1 liam p. gaffney oliver lodge laboratory, university of liverpool, uk instituut voor kern- en...
TRANSCRIPT
1
Liam P GaffneyLiam P Gaffney
Oliver Lodge Laboratory University of Liverpool UKOliver Lodge Laboratory University of Liverpool UK
Instituut voor Kern- en Stralingsfysica KU Leuven Belgium Instituut voor Kern- en Stralingsfysica KU Leuven Belgium
Octupole collectivityOctupole collectivitystudied using radioactive-ion studied using radioactive-ion beamsbeams
1
2
Octupole Collectivity
λ = 2 Quadrupoleλ = 3 Octupole
68Se
90Se
144Ba
148150Nd
226Ra
2λ
Octupole correlations enhanced at magic numbers 34 56 88 134
Exotic regions of the Segreacute chart so far inaccessible
Radioactive Ion Beams are the key
Schiff momen
t
CP violationEDM
Odd-ATalk by Peter Butler earlier this morning
3
Octupole CollectivityMicroscopically
Intruder orbitals of opposite parity and ∆J ∆L = 3 close to the Fermi level
220Rn and 224Ra lie near Z=88 N=134
εF
20
28
50
82
126
184
34
56
88
134
4
Octupole CollectivityMacroscopically
Nuclei take on a ldquopearrdquo shape
Reflection asymmetric
bull β3-vibrationbull Static β3-deformationbull Rigid β3-deformation
Signatures
Odd-even staggering negative parity
Parity doublets in odd-A nuclei
Enhanced E1 transitions
Large E3 strength rarr =
5
Octupole Collectivity
Rn (Z=86)
Z = 34
Z = 56
Z = 88 N = 134
6
Radon-220 and Radium-224
220Rn 224Ra[ref] JFC Cocks et al Phys Rev Lett 78 (1997) and Nucl Phys A 645 (1999)
7
Coulomb Excitation
Projectile (Z1A1)
Target (Z2A2)
bθ
v
Sommerfeld parameter
ldquoSaferdquo Coulex
Reduced matrix elements
8
REX-ISOLDEIsotopeSeparationOn-Line D-Etector
RIBE-Xperiment
RadioactiveIonBeam 14GeV protons
from PS BoosterA
Heated tungsten line (Ra)
Plasma ion source (Rn)
Ionised atoms diffuse out of target
B
Mass separationin HRS
C
DPost-acceleration
8 UCx
9
MINIBALL REX-ISOLDE
9
220Rn224Ra beam
~283AMeV
Coulex target~2mgcm2
10
MINIBALLbull Particle ID in a Double-Sided Si Strip Detector
bull Event by event Doppler correction
bull 17˚ lt θlab lt 54˚
bull Array of HPGe of 8 triple clusters
bull 6-fold segmentation for positioning
bull ε gt 7 for 13MeV γ-rays
11
Particle-gamma coincidences
Prompt Random
Normalisation = tprompt
trandom
12
Analysis - 224Ra NiSn
60Ni target - 21mgcm2
120Sn target - 20mgcm2
13
Analysis - 220Rn NiSn
60Ni target - 21mgcm2
120Sn target - 23mgcm2
14
Analysis - 220Rn γ-γ
γ(697 keV)
15
Analysis - 220Rn HighLow θ
High CoM θLow CoM θ
16
Analysis - 224Ra Gosia16 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 3- 5- 7- 2+γ)
-- 5
Delayed-coincidence[56] Lifetimes (2+ 4+) -- 2
CdSn high CoM range 239˚ lt θlab lt 403˚
γ-ray yield-- 8 + 7
Ni high CoM range 231˚ lt θlab lt 399˚
γ-ray yield-- 10
CdSn low CoM range 403˚ lt θlab lt 543˚
γ-ray yield-- 8 + 8
Ni low CoM range 393˚ lt θlab lt 532˚
γ-ray yield-- 7
Total 55 data points[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 055
16
17
Results - 224Ra
bull Consistent with rotational model
bull Unstretched E3 matrix elements are non-zero Rot-vib model predicts these vanish
bull Coupled with level energy data we observe a static octupole deformation in 224Ra Awai
ting p
ublicat
ion
Embar
goed b
y Jo
urnal
0+
2+
4+ 1-
3-
5-
3ℏ phonon
18
Analysis - 220Rn Gosia15 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 5- 7-)
-- 3
Delayed-coincidence[56] Lifetimes (2+) -- 1
CdSnNi high CoM range 221˚ lt θlab lt 378˚
γ-ray yield-- 2 + 8 + 5
CdSnNi low CoM range 379˚ lt θlab lt 518˚
γ-ray yield-- 2 + 8 + 5
Total 34 data points
[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 086
19
Results - 220Rn
bull Consistent with rotational model
bull No information on unstretched E3
bull Larger data set required to determine if lt1-||E3||2+gt or lt1-||E3||4+gt vanish
bull Not definitive determination of collective mode dynamic (vibrational) or static (rotational) from Q3 alone
bull δE and Δix implies a coupling of an octupole phonon to the even-spin rotational band
bull Magnitude of Q3 consistent with dynamic picture similar to Q3(208Pb) and Q3(232Th)
bull Dynamic collectivity in 220Rn
Awaiting publication
Embargoed by Journal
20
220Rn - Vibrational
QuickTimetrade and a decompressor
are needed to see this picture
21
Discussion and Interpretation
8 -8
22
Discussion and Interpretation
23
Comparison to theory
Q1
Q2
Q3
bull Cluster model [1] - Misses small Q1
- Q2 is consistently too low- Q3 trend not observed
bull Mean field HFB with D1S or D1M [2]- Predicts cancelation of Q1
- Differences in Q3 predictions
[1] Shneidman et al (2003) Phys Rev C 67(1) 14313
[2] Robledo L M amp Bertsch G F (2011) Phys Rev C 84(5) 54302
Awaiting publicationEmbargoed by Journal
24
Summary amp Outlook
See talk by George OrsquoNeill at 1545 today
bull Demonstrated sensitivity and ability to measure E3 matrix elements with Radioactive Ion Beams (RIBs)
bull B(E3 3- -gt 0+) measured for the first time in Rn and only second measurement in Ra both to ~10 precision
bull Experimental values rule out trend of cluster models
bull Exposes detailed differences in parameterisations of mean field calculations
bull Proposal for measurements in 222226228Ra and Ba region
bull Odd-mass nuclei key to atomic EDM measurements
25
CollaboratorsTE Cocolios J Pakarinen JCederkall D Voulot F Wernander
Th Kroumlll S Boumlnig C Bauer M von SchmidB Bastin
T Grahn A HerzanA Blazhev M Seidlitz N Warr M Albers M Pfeiffer D Radeck
M Rudigier P ThoumlleP van Duppen N Bree J Diriken N Kesteloot
S Sambi K ReyndersL P Gaffney P A Butler M Scheck DT Joss SV Rigby
E KwanT Chupp
D Cline CY WuM Zielinska P Napiorkowski M Kowalczyk
DG JenkinsCERN-ISOLDE SwitzerlandTU Darmstadt GermanyGanil FranceUniversity of Jyvaumlskylauml FinlandUniversity of Koumlln Germany
KU Leuven Belgium
University of Liverpool UK Lawrence Livermore Laboratory USUniversity of Michigan USUniversity of Rochester USHIL University of Warsaw PolandUniversity of York UK
Thank youand the REX-ISOLDE and MINIBALL collaborations
26
Aside - Protons off
bull Evidence of rapid exponential decay in beam rate after protons cease
bull Comparison of direct production vs alpha decay of parent (T12 = 366 days)
27
Radon-220 and Radium-224
220Rn
224Ra
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
- Slide 12
- Slide 13
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Slide 21
- Slide 22
- Slide 23
- Slide 24
- Slide 25
- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
2
Octupole Collectivity
λ = 2 Quadrupoleλ = 3 Octupole
68Se
90Se
144Ba
148150Nd
226Ra
2λ
Octupole correlations enhanced at magic numbers 34 56 88 134
Exotic regions of the Segreacute chart so far inaccessible
Radioactive Ion Beams are the key
Schiff momen
t
CP violationEDM
Odd-ATalk by Peter Butler earlier this morning
3
Octupole CollectivityMicroscopically
Intruder orbitals of opposite parity and ∆J ∆L = 3 close to the Fermi level
220Rn and 224Ra lie near Z=88 N=134
εF
20
28
50
82
126
184
34
56
88
134
4
Octupole CollectivityMacroscopically
Nuclei take on a ldquopearrdquo shape
Reflection asymmetric
bull β3-vibrationbull Static β3-deformationbull Rigid β3-deformation
Signatures
Odd-even staggering negative parity
Parity doublets in odd-A nuclei
Enhanced E1 transitions
Large E3 strength rarr =
5
Octupole Collectivity
Rn (Z=86)
Z = 34
Z = 56
Z = 88 N = 134
6
Radon-220 and Radium-224
220Rn 224Ra[ref] JFC Cocks et al Phys Rev Lett 78 (1997) and Nucl Phys A 645 (1999)
7
Coulomb Excitation
Projectile (Z1A1)
Target (Z2A2)
bθ
v
Sommerfeld parameter
ldquoSaferdquo Coulex
Reduced matrix elements
8
REX-ISOLDEIsotopeSeparationOn-Line D-Etector
RIBE-Xperiment
RadioactiveIonBeam 14GeV protons
from PS BoosterA
Heated tungsten line (Ra)
Plasma ion source (Rn)
Ionised atoms diffuse out of target
B
Mass separationin HRS
C
DPost-acceleration
8 UCx
9
MINIBALL REX-ISOLDE
9
220Rn224Ra beam
~283AMeV
Coulex target~2mgcm2
10
MINIBALLbull Particle ID in a Double-Sided Si Strip Detector
bull Event by event Doppler correction
bull 17˚ lt θlab lt 54˚
bull Array of HPGe of 8 triple clusters
bull 6-fold segmentation for positioning
bull ε gt 7 for 13MeV γ-rays
11
Particle-gamma coincidences
Prompt Random
Normalisation = tprompt
trandom
12
Analysis - 224Ra NiSn
60Ni target - 21mgcm2
120Sn target - 20mgcm2
13
Analysis - 220Rn NiSn
60Ni target - 21mgcm2
120Sn target - 23mgcm2
14
Analysis - 220Rn γ-γ
γ(697 keV)
15
Analysis - 220Rn HighLow θ
High CoM θLow CoM θ
16
Analysis - 224Ra Gosia16 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 3- 5- 7- 2+γ)
-- 5
Delayed-coincidence[56] Lifetimes (2+ 4+) -- 2
CdSn high CoM range 239˚ lt θlab lt 403˚
γ-ray yield-- 8 + 7
Ni high CoM range 231˚ lt θlab lt 399˚
γ-ray yield-- 10
CdSn low CoM range 403˚ lt θlab lt 543˚
γ-ray yield-- 8 + 8
Ni low CoM range 393˚ lt θlab lt 532˚
γ-ray yield-- 7
Total 55 data points[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 055
16
17
Results - 224Ra
bull Consistent with rotational model
bull Unstretched E3 matrix elements are non-zero Rot-vib model predicts these vanish
bull Coupled with level energy data we observe a static octupole deformation in 224Ra Awai
ting p
ublicat
ion
Embar
goed b
y Jo
urnal
0+
2+
4+ 1-
3-
5-
3ℏ phonon
18
Analysis - 220Rn Gosia15 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 5- 7-)
-- 3
Delayed-coincidence[56] Lifetimes (2+) -- 1
CdSnNi high CoM range 221˚ lt θlab lt 378˚
γ-ray yield-- 2 + 8 + 5
CdSnNi low CoM range 379˚ lt θlab lt 518˚
γ-ray yield-- 2 + 8 + 5
Total 34 data points
[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 086
19
Results - 220Rn
bull Consistent with rotational model
bull No information on unstretched E3
bull Larger data set required to determine if lt1-||E3||2+gt or lt1-||E3||4+gt vanish
bull Not definitive determination of collective mode dynamic (vibrational) or static (rotational) from Q3 alone
bull δE and Δix implies a coupling of an octupole phonon to the even-spin rotational band
bull Magnitude of Q3 consistent with dynamic picture similar to Q3(208Pb) and Q3(232Th)
bull Dynamic collectivity in 220Rn
Awaiting publication
Embargoed by Journal
20
220Rn - Vibrational
QuickTimetrade and a decompressor
are needed to see this picture
21
Discussion and Interpretation
8 -8
22
Discussion and Interpretation
23
Comparison to theory
Q1
Q2
Q3
bull Cluster model [1] - Misses small Q1
- Q2 is consistently too low- Q3 trend not observed
bull Mean field HFB with D1S or D1M [2]- Predicts cancelation of Q1
- Differences in Q3 predictions
[1] Shneidman et al (2003) Phys Rev C 67(1) 14313
[2] Robledo L M amp Bertsch G F (2011) Phys Rev C 84(5) 54302
Awaiting publicationEmbargoed by Journal
24
Summary amp Outlook
See talk by George OrsquoNeill at 1545 today
bull Demonstrated sensitivity and ability to measure E3 matrix elements with Radioactive Ion Beams (RIBs)
bull B(E3 3- -gt 0+) measured for the first time in Rn and only second measurement in Ra both to ~10 precision
bull Experimental values rule out trend of cluster models
bull Exposes detailed differences in parameterisations of mean field calculations
bull Proposal for measurements in 222226228Ra and Ba region
bull Odd-mass nuclei key to atomic EDM measurements
25
CollaboratorsTE Cocolios J Pakarinen JCederkall D Voulot F Wernander
Th Kroumlll S Boumlnig C Bauer M von SchmidB Bastin
T Grahn A HerzanA Blazhev M Seidlitz N Warr M Albers M Pfeiffer D Radeck
M Rudigier P ThoumlleP van Duppen N Bree J Diriken N Kesteloot
S Sambi K ReyndersL P Gaffney P A Butler M Scheck DT Joss SV Rigby
E KwanT Chupp
D Cline CY WuM Zielinska P Napiorkowski M Kowalczyk
DG JenkinsCERN-ISOLDE SwitzerlandTU Darmstadt GermanyGanil FranceUniversity of Jyvaumlskylauml FinlandUniversity of Koumlln Germany
KU Leuven Belgium
University of Liverpool UK Lawrence Livermore Laboratory USUniversity of Michigan USUniversity of Rochester USHIL University of Warsaw PolandUniversity of York UK
Thank youand the REX-ISOLDE and MINIBALL collaborations
26
Aside - Protons off
bull Evidence of rapid exponential decay in beam rate after protons cease
bull Comparison of direct production vs alpha decay of parent (T12 = 366 days)
27
Radon-220 and Radium-224
220Rn
224Ra
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
- Slide 12
- Slide 13
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Slide 21
- Slide 22
- Slide 23
- Slide 24
- Slide 25
- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
3
Octupole CollectivityMicroscopically
Intruder orbitals of opposite parity and ∆J ∆L = 3 close to the Fermi level
220Rn and 224Ra lie near Z=88 N=134
εF
20
28
50
82
126
184
34
56
88
134
4
Octupole CollectivityMacroscopically
Nuclei take on a ldquopearrdquo shape
Reflection asymmetric
bull β3-vibrationbull Static β3-deformationbull Rigid β3-deformation
Signatures
Odd-even staggering negative parity
Parity doublets in odd-A nuclei
Enhanced E1 transitions
Large E3 strength rarr =
5
Octupole Collectivity
Rn (Z=86)
Z = 34
Z = 56
Z = 88 N = 134
6
Radon-220 and Radium-224
220Rn 224Ra[ref] JFC Cocks et al Phys Rev Lett 78 (1997) and Nucl Phys A 645 (1999)
7
Coulomb Excitation
Projectile (Z1A1)
Target (Z2A2)
bθ
v
Sommerfeld parameter
ldquoSaferdquo Coulex
Reduced matrix elements
8
REX-ISOLDEIsotopeSeparationOn-Line D-Etector
RIBE-Xperiment
RadioactiveIonBeam 14GeV protons
from PS BoosterA
Heated tungsten line (Ra)
Plasma ion source (Rn)
Ionised atoms diffuse out of target
B
Mass separationin HRS
C
DPost-acceleration
8 UCx
9
MINIBALL REX-ISOLDE
9
220Rn224Ra beam
~283AMeV
Coulex target~2mgcm2
10
MINIBALLbull Particle ID in a Double-Sided Si Strip Detector
bull Event by event Doppler correction
bull 17˚ lt θlab lt 54˚
bull Array of HPGe of 8 triple clusters
bull 6-fold segmentation for positioning
bull ε gt 7 for 13MeV γ-rays
11
Particle-gamma coincidences
Prompt Random
Normalisation = tprompt
trandom
12
Analysis - 224Ra NiSn
60Ni target - 21mgcm2
120Sn target - 20mgcm2
13
Analysis - 220Rn NiSn
60Ni target - 21mgcm2
120Sn target - 23mgcm2
14
Analysis - 220Rn γ-γ
γ(697 keV)
15
Analysis - 220Rn HighLow θ
High CoM θLow CoM θ
16
Analysis - 224Ra Gosia16 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 3- 5- 7- 2+γ)
-- 5
Delayed-coincidence[56] Lifetimes (2+ 4+) -- 2
CdSn high CoM range 239˚ lt θlab lt 403˚
γ-ray yield-- 8 + 7
Ni high CoM range 231˚ lt θlab lt 399˚
γ-ray yield-- 10
CdSn low CoM range 403˚ lt θlab lt 543˚
γ-ray yield-- 8 + 8
Ni low CoM range 393˚ lt θlab lt 532˚
γ-ray yield-- 7
Total 55 data points[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 055
16
17
Results - 224Ra
bull Consistent with rotational model
bull Unstretched E3 matrix elements are non-zero Rot-vib model predicts these vanish
bull Coupled with level energy data we observe a static octupole deformation in 224Ra Awai
ting p
ublicat
ion
Embar
goed b
y Jo
urnal
0+
2+
4+ 1-
3-
5-
3ℏ phonon
18
Analysis - 220Rn Gosia15 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 5- 7-)
-- 3
Delayed-coincidence[56] Lifetimes (2+) -- 1
CdSnNi high CoM range 221˚ lt θlab lt 378˚
γ-ray yield-- 2 + 8 + 5
CdSnNi low CoM range 379˚ lt θlab lt 518˚
γ-ray yield-- 2 + 8 + 5
Total 34 data points
[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 086
19
Results - 220Rn
bull Consistent with rotational model
bull No information on unstretched E3
bull Larger data set required to determine if lt1-||E3||2+gt or lt1-||E3||4+gt vanish
bull Not definitive determination of collective mode dynamic (vibrational) or static (rotational) from Q3 alone
bull δE and Δix implies a coupling of an octupole phonon to the even-spin rotational band
bull Magnitude of Q3 consistent with dynamic picture similar to Q3(208Pb) and Q3(232Th)
bull Dynamic collectivity in 220Rn
Awaiting publication
Embargoed by Journal
20
220Rn - Vibrational
QuickTimetrade and a decompressor
are needed to see this picture
21
Discussion and Interpretation
8 -8
22
Discussion and Interpretation
23
Comparison to theory
Q1
Q2
Q3
bull Cluster model [1] - Misses small Q1
- Q2 is consistently too low- Q3 trend not observed
bull Mean field HFB with D1S or D1M [2]- Predicts cancelation of Q1
- Differences in Q3 predictions
[1] Shneidman et al (2003) Phys Rev C 67(1) 14313
[2] Robledo L M amp Bertsch G F (2011) Phys Rev C 84(5) 54302
Awaiting publicationEmbargoed by Journal
24
Summary amp Outlook
See talk by George OrsquoNeill at 1545 today
bull Demonstrated sensitivity and ability to measure E3 matrix elements with Radioactive Ion Beams (RIBs)
bull B(E3 3- -gt 0+) measured for the first time in Rn and only second measurement in Ra both to ~10 precision
bull Experimental values rule out trend of cluster models
bull Exposes detailed differences in parameterisations of mean field calculations
bull Proposal for measurements in 222226228Ra and Ba region
bull Odd-mass nuclei key to atomic EDM measurements
25
CollaboratorsTE Cocolios J Pakarinen JCederkall D Voulot F Wernander
Th Kroumlll S Boumlnig C Bauer M von SchmidB Bastin
T Grahn A HerzanA Blazhev M Seidlitz N Warr M Albers M Pfeiffer D Radeck
M Rudigier P ThoumlleP van Duppen N Bree J Diriken N Kesteloot
S Sambi K ReyndersL P Gaffney P A Butler M Scheck DT Joss SV Rigby
E KwanT Chupp
D Cline CY WuM Zielinska P Napiorkowski M Kowalczyk
DG JenkinsCERN-ISOLDE SwitzerlandTU Darmstadt GermanyGanil FranceUniversity of Jyvaumlskylauml FinlandUniversity of Koumlln Germany
KU Leuven Belgium
University of Liverpool UK Lawrence Livermore Laboratory USUniversity of Michigan USUniversity of Rochester USHIL University of Warsaw PolandUniversity of York UK
Thank youand the REX-ISOLDE and MINIBALL collaborations
26
Aside - Protons off
bull Evidence of rapid exponential decay in beam rate after protons cease
bull Comparison of direct production vs alpha decay of parent (T12 = 366 days)
27
Radon-220 and Radium-224
220Rn
224Ra
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
- Slide 12
- Slide 13
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Slide 21
- Slide 22
- Slide 23
- Slide 24
- Slide 25
- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
4
Octupole CollectivityMacroscopically
Nuclei take on a ldquopearrdquo shape
Reflection asymmetric
bull β3-vibrationbull Static β3-deformationbull Rigid β3-deformation
Signatures
Odd-even staggering negative parity
Parity doublets in odd-A nuclei
Enhanced E1 transitions
Large E3 strength rarr =
5
Octupole Collectivity
Rn (Z=86)
Z = 34
Z = 56
Z = 88 N = 134
6
Radon-220 and Radium-224
220Rn 224Ra[ref] JFC Cocks et al Phys Rev Lett 78 (1997) and Nucl Phys A 645 (1999)
7
Coulomb Excitation
Projectile (Z1A1)
Target (Z2A2)
bθ
v
Sommerfeld parameter
ldquoSaferdquo Coulex
Reduced matrix elements
8
REX-ISOLDEIsotopeSeparationOn-Line D-Etector
RIBE-Xperiment
RadioactiveIonBeam 14GeV protons
from PS BoosterA
Heated tungsten line (Ra)
Plasma ion source (Rn)
Ionised atoms diffuse out of target
B
Mass separationin HRS
C
DPost-acceleration
8 UCx
9
MINIBALL REX-ISOLDE
9
220Rn224Ra beam
~283AMeV
Coulex target~2mgcm2
10
MINIBALLbull Particle ID in a Double-Sided Si Strip Detector
bull Event by event Doppler correction
bull 17˚ lt θlab lt 54˚
bull Array of HPGe of 8 triple clusters
bull 6-fold segmentation for positioning
bull ε gt 7 for 13MeV γ-rays
11
Particle-gamma coincidences
Prompt Random
Normalisation = tprompt
trandom
12
Analysis - 224Ra NiSn
60Ni target - 21mgcm2
120Sn target - 20mgcm2
13
Analysis - 220Rn NiSn
60Ni target - 21mgcm2
120Sn target - 23mgcm2
14
Analysis - 220Rn γ-γ
γ(697 keV)
15
Analysis - 220Rn HighLow θ
High CoM θLow CoM θ
16
Analysis - 224Ra Gosia16 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 3- 5- 7- 2+γ)
-- 5
Delayed-coincidence[56] Lifetimes (2+ 4+) -- 2
CdSn high CoM range 239˚ lt θlab lt 403˚
γ-ray yield-- 8 + 7
Ni high CoM range 231˚ lt θlab lt 399˚
γ-ray yield-- 10
CdSn low CoM range 403˚ lt θlab lt 543˚
γ-ray yield-- 8 + 8
Ni low CoM range 393˚ lt θlab lt 532˚
γ-ray yield-- 7
Total 55 data points[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 055
16
17
Results - 224Ra
bull Consistent with rotational model
bull Unstretched E3 matrix elements are non-zero Rot-vib model predicts these vanish
bull Coupled with level energy data we observe a static octupole deformation in 224Ra Awai
ting p
ublicat
ion
Embar
goed b
y Jo
urnal
0+
2+
4+ 1-
3-
5-
3ℏ phonon
18
Analysis - 220Rn Gosia15 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 5- 7-)
-- 3
Delayed-coincidence[56] Lifetimes (2+) -- 1
CdSnNi high CoM range 221˚ lt θlab lt 378˚
γ-ray yield-- 2 + 8 + 5
CdSnNi low CoM range 379˚ lt θlab lt 518˚
γ-ray yield-- 2 + 8 + 5
Total 34 data points
[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 086
19
Results - 220Rn
bull Consistent with rotational model
bull No information on unstretched E3
bull Larger data set required to determine if lt1-||E3||2+gt or lt1-||E3||4+gt vanish
bull Not definitive determination of collective mode dynamic (vibrational) or static (rotational) from Q3 alone
bull δE and Δix implies a coupling of an octupole phonon to the even-spin rotational band
bull Magnitude of Q3 consistent with dynamic picture similar to Q3(208Pb) and Q3(232Th)
bull Dynamic collectivity in 220Rn
Awaiting publication
Embargoed by Journal
20
220Rn - Vibrational
QuickTimetrade and a decompressor
are needed to see this picture
21
Discussion and Interpretation
8 -8
22
Discussion and Interpretation
23
Comparison to theory
Q1
Q2
Q3
bull Cluster model [1] - Misses small Q1
- Q2 is consistently too low- Q3 trend not observed
bull Mean field HFB with D1S or D1M [2]- Predicts cancelation of Q1
- Differences in Q3 predictions
[1] Shneidman et al (2003) Phys Rev C 67(1) 14313
[2] Robledo L M amp Bertsch G F (2011) Phys Rev C 84(5) 54302
Awaiting publicationEmbargoed by Journal
24
Summary amp Outlook
See talk by George OrsquoNeill at 1545 today
bull Demonstrated sensitivity and ability to measure E3 matrix elements with Radioactive Ion Beams (RIBs)
bull B(E3 3- -gt 0+) measured for the first time in Rn and only second measurement in Ra both to ~10 precision
bull Experimental values rule out trend of cluster models
bull Exposes detailed differences in parameterisations of mean field calculations
bull Proposal for measurements in 222226228Ra and Ba region
bull Odd-mass nuclei key to atomic EDM measurements
25
CollaboratorsTE Cocolios J Pakarinen JCederkall D Voulot F Wernander
Th Kroumlll S Boumlnig C Bauer M von SchmidB Bastin
T Grahn A HerzanA Blazhev M Seidlitz N Warr M Albers M Pfeiffer D Radeck
M Rudigier P ThoumlleP van Duppen N Bree J Diriken N Kesteloot
S Sambi K ReyndersL P Gaffney P A Butler M Scheck DT Joss SV Rigby
E KwanT Chupp
D Cline CY WuM Zielinska P Napiorkowski M Kowalczyk
DG JenkinsCERN-ISOLDE SwitzerlandTU Darmstadt GermanyGanil FranceUniversity of Jyvaumlskylauml FinlandUniversity of Koumlln Germany
KU Leuven Belgium
University of Liverpool UK Lawrence Livermore Laboratory USUniversity of Michigan USUniversity of Rochester USHIL University of Warsaw PolandUniversity of York UK
Thank youand the REX-ISOLDE and MINIBALL collaborations
26
Aside - Protons off
bull Evidence of rapid exponential decay in beam rate after protons cease
bull Comparison of direct production vs alpha decay of parent (T12 = 366 days)
27
Radon-220 and Radium-224
220Rn
224Ra
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
- Slide 12
- Slide 13
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Slide 21
- Slide 22
- Slide 23
- Slide 24
- Slide 25
- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
5
Octupole Collectivity
Rn (Z=86)
Z = 34
Z = 56
Z = 88 N = 134
6
Radon-220 and Radium-224
220Rn 224Ra[ref] JFC Cocks et al Phys Rev Lett 78 (1997) and Nucl Phys A 645 (1999)
7
Coulomb Excitation
Projectile (Z1A1)
Target (Z2A2)
bθ
v
Sommerfeld parameter
ldquoSaferdquo Coulex
Reduced matrix elements
8
REX-ISOLDEIsotopeSeparationOn-Line D-Etector
RIBE-Xperiment
RadioactiveIonBeam 14GeV protons
from PS BoosterA
Heated tungsten line (Ra)
Plasma ion source (Rn)
Ionised atoms diffuse out of target
B
Mass separationin HRS
C
DPost-acceleration
8 UCx
9
MINIBALL REX-ISOLDE
9
220Rn224Ra beam
~283AMeV
Coulex target~2mgcm2
10
MINIBALLbull Particle ID in a Double-Sided Si Strip Detector
bull Event by event Doppler correction
bull 17˚ lt θlab lt 54˚
bull Array of HPGe of 8 triple clusters
bull 6-fold segmentation for positioning
bull ε gt 7 for 13MeV γ-rays
11
Particle-gamma coincidences
Prompt Random
Normalisation = tprompt
trandom
12
Analysis - 224Ra NiSn
60Ni target - 21mgcm2
120Sn target - 20mgcm2
13
Analysis - 220Rn NiSn
60Ni target - 21mgcm2
120Sn target - 23mgcm2
14
Analysis - 220Rn γ-γ
γ(697 keV)
15
Analysis - 220Rn HighLow θ
High CoM θLow CoM θ
16
Analysis - 224Ra Gosia16 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 3- 5- 7- 2+γ)
-- 5
Delayed-coincidence[56] Lifetimes (2+ 4+) -- 2
CdSn high CoM range 239˚ lt θlab lt 403˚
γ-ray yield-- 8 + 7
Ni high CoM range 231˚ lt θlab lt 399˚
γ-ray yield-- 10
CdSn low CoM range 403˚ lt θlab lt 543˚
γ-ray yield-- 8 + 8
Ni low CoM range 393˚ lt θlab lt 532˚
γ-ray yield-- 7
Total 55 data points[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 055
16
17
Results - 224Ra
bull Consistent with rotational model
bull Unstretched E3 matrix elements are non-zero Rot-vib model predicts these vanish
bull Coupled with level energy data we observe a static octupole deformation in 224Ra Awai
ting p
ublicat
ion
Embar
goed b
y Jo
urnal
0+
2+
4+ 1-
3-
5-
3ℏ phonon
18
Analysis - 220Rn Gosia15 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 5- 7-)
-- 3
Delayed-coincidence[56] Lifetimes (2+) -- 1
CdSnNi high CoM range 221˚ lt θlab lt 378˚
γ-ray yield-- 2 + 8 + 5
CdSnNi low CoM range 379˚ lt θlab lt 518˚
γ-ray yield-- 2 + 8 + 5
Total 34 data points
[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 086
19
Results - 220Rn
bull Consistent with rotational model
bull No information on unstretched E3
bull Larger data set required to determine if lt1-||E3||2+gt or lt1-||E3||4+gt vanish
bull Not definitive determination of collective mode dynamic (vibrational) or static (rotational) from Q3 alone
bull δE and Δix implies a coupling of an octupole phonon to the even-spin rotational band
bull Magnitude of Q3 consistent with dynamic picture similar to Q3(208Pb) and Q3(232Th)
bull Dynamic collectivity in 220Rn
Awaiting publication
Embargoed by Journal
20
220Rn - Vibrational
QuickTimetrade and a decompressor
are needed to see this picture
21
Discussion and Interpretation
8 -8
22
Discussion and Interpretation
23
Comparison to theory
Q1
Q2
Q3
bull Cluster model [1] - Misses small Q1
- Q2 is consistently too low- Q3 trend not observed
bull Mean field HFB with D1S or D1M [2]- Predicts cancelation of Q1
- Differences in Q3 predictions
[1] Shneidman et al (2003) Phys Rev C 67(1) 14313
[2] Robledo L M amp Bertsch G F (2011) Phys Rev C 84(5) 54302
Awaiting publicationEmbargoed by Journal
24
Summary amp Outlook
See talk by George OrsquoNeill at 1545 today
bull Demonstrated sensitivity and ability to measure E3 matrix elements with Radioactive Ion Beams (RIBs)
bull B(E3 3- -gt 0+) measured for the first time in Rn and only second measurement in Ra both to ~10 precision
bull Experimental values rule out trend of cluster models
bull Exposes detailed differences in parameterisations of mean field calculations
bull Proposal for measurements in 222226228Ra and Ba region
bull Odd-mass nuclei key to atomic EDM measurements
25
CollaboratorsTE Cocolios J Pakarinen JCederkall D Voulot F Wernander
Th Kroumlll S Boumlnig C Bauer M von SchmidB Bastin
T Grahn A HerzanA Blazhev M Seidlitz N Warr M Albers M Pfeiffer D Radeck
M Rudigier P ThoumlleP van Duppen N Bree J Diriken N Kesteloot
S Sambi K ReyndersL P Gaffney P A Butler M Scheck DT Joss SV Rigby
E KwanT Chupp
D Cline CY WuM Zielinska P Napiorkowski M Kowalczyk
DG JenkinsCERN-ISOLDE SwitzerlandTU Darmstadt GermanyGanil FranceUniversity of Jyvaumlskylauml FinlandUniversity of Koumlln Germany
KU Leuven Belgium
University of Liverpool UK Lawrence Livermore Laboratory USUniversity of Michigan USUniversity of Rochester USHIL University of Warsaw PolandUniversity of York UK
Thank youand the REX-ISOLDE and MINIBALL collaborations
26
Aside - Protons off
bull Evidence of rapid exponential decay in beam rate after protons cease
bull Comparison of direct production vs alpha decay of parent (T12 = 366 days)
27
Radon-220 and Radium-224
220Rn
224Ra
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
- Slide 12
- Slide 13
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Slide 21
- Slide 22
- Slide 23
- Slide 24
- Slide 25
- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
6
Radon-220 and Radium-224
220Rn 224Ra[ref] JFC Cocks et al Phys Rev Lett 78 (1997) and Nucl Phys A 645 (1999)
7
Coulomb Excitation
Projectile (Z1A1)
Target (Z2A2)
bθ
v
Sommerfeld parameter
ldquoSaferdquo Coulex
Reduced matrix elements
8
REX-ISOLDEIsotopeSeparationOn-Line D-Etector
RIBE-Xperiment
RadioactiveIonBeam 14GeV protons
from PS BoosterA
Heated tungsten line (Ra)
Plasma ion source (Rn)
Ionised atoms diffuse out of target
B
Mass separationin HRS
C
DPost-acceleration
8 UCx
9
MINIBALL REX-ISOLDE
9
220Rn224Ra beam
~283AMeV
Coulex target~2mgcm2
10
MINIBALLbull Particle ID in a Double-Sided Si Strip Detector
bull Event by event Doppler correction
bull 17˚ lt θlab lt 54˚
bull Array of HPGe of 8 triple clusters
bull 6-fold segmentation for positioning
bull ε gt 7 for 13MeV γ-rays
11
Particle-gamma coincidences
Prompt Random
Normalisation = tprompt
trandom
12
Analysis - 224Ra NiSn
60Ni target - 21mgcm2
120Sn target - 20mgcm2
13
Analysis - 220Rn NiSn
60Ni target - 21mgcm2
120Sn target - 23mgcm2
14
Analysis - 220Rn γ-γ
γ(697 keV)
15
Analysis - 220Rn HighLow θ
High CoM θLow CoM θ
16
Analysis - 224Ra Gosia16 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 3- 5- 7- 2+γ)
-- 5
Delayed-coincidence[56] Lifetimes (2+ 4+) -- 2
CdSn high CoM range 239˚ lt θlab lt 403˚
γ-ray yield-- 8 + 7
Ni high CoM range 231˚ lt θlab lt 399˚
γ-ray yield-- 10
CdSn low CoM range 403˚ lt θlab lt 543˚
γ-ray yield-- 8 + 8
Ni low CoM range 393˚ lt θlab lt 532˚
γ-ray yield-- 7
Total 55 data points[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 055
16
17
Results - 224Ra
bull Consistent with rotational model
bull Unstretched E3 matrix elements are non-zero Rot-vib model predicts these vanish
bull Coupled with level energy data we observe a static octupole deformation in 224Ra Awai
ting p
ublicat
ion
Embar
goed b
y Jo
urnal
0+
2+
4+ 1-
3-
5-
3ℏ phonon
18
Analysis - 220Rn Gosia15 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 5- 7-)
-- 3
Delayed-coincidence[56] Lifetimes (2+) -- 1
CdSnNi high CoM range 221˚ lt θlab lt 378˚
γ-ray yield-- 2 + 8 + 5
CdSnNi low CoM range 379˚ lt θlab lt 518˚
γ-ray yield-- 2 + 8 + 5
Total 34 data points
[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 086
19
Results - 220Rn
bull Consistent with rotational model
bull No information on unstretched E3
bull Larger data set required to determine if lt1-||E3||2+gt or lt1-||E3||4+gt vanish
bull Not definitive determination of collective mode dynamic (vibrational) or static (rotational) from Q3 alone
bull δE and Δix implies a coupling of an octupole phonon to the even-spin rotational band
bull Magnitude of Q3 consistent with dynamic picture similar to Q3(208Pb) and Q3(232Th)
bull Dynamic collectivity in 220Rn
Awaiting publication
Embargoed by Journal
20
220Rn - Vibrational
QuickTimetrade and a decompressor
are needed to see this picture
21
Discussion and Interpretation
8 -8
22
Discussion and Interpretation
23
Comparison to theory
Q1
Q2
Q3
bull Cluster model [1] - Misses small Q1
- Q2 is consistently too low- Q3 trend not observed
bull Mean field HFB with D1S or D1M [2]- Predicts cancelation of Q1
- Differences in Q3 predictions
[1] Shneidman et al (2003) Phys Rev C 67(1) 14313
[2] Robledo L M amp Bertsch G F (2011) Phys Rev C 84(5) 54302
Awaiting publicationEmbargoed by Journal
24
Summary amp Outlook
See talk by George OrsquoNeill at 1545 today
bull Demonstrated sensitivity and ability to measure E3 matrix elements with Radioactive Ion Beams (RIBs)
bull B(E3 3- -gt 0+) measured for the first time in Rn and only second measurement in Ra both to ~10 precision
bull Experimental values rule out trend of cluster models
bull Exposes detailed differences in parameterisations of mean field calculations
bull Proposal for measurements in 222226228Ra and Ba region
bull Odd-mass nuclei key to atomic EDM measurements
25
CollaboratorsTE Cocolios J Pakarinen JCederkall D Voulot F Wernander
Th Kroumlll S Boumlnig C Bauer M von SchmidB Bastin
T Grahn A HerzanA Blazhev M Seidlitz N Warr M Albers M Pfeiffer D Radeck
M Rudigier P ThoumlleP van Duppen N Bree J Diriken N Kesteloot
S Sambi K ReyndersL P Gaffney P A Butler M Scheck DT Joss SV Rigby
E KwanT Chupp
D Cline CY WuM Zielinska P Napiorkowski M Kowalczyk
DG JenkinsCERN-ISOLDE SwitzerlandTU Darmstadt GermanyGanil FranceUniversity of Jyvaumlskylauml FinlandUniversity of Koumlln Germany
KU Leuven Belgium
University of Liverpool UK Lawrence Livermore Laboratory USUniversity of Michigan USUniversity of Rochester USHIL University of Warsaw PolandUniversity of York UK
Thank youand the REX-ISOLDE and MINIBALL collaborations
26
Aside - Protons off
bull Evidence of rapid exponential decay in beam rate after protons cease
bull Comparison of direct production vs alpha decay of parent (T12 = 366 days)
27
Radon-220 and Radium-224
220Rn
224Ra
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
- Slide 12
- Slide 13
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Slide 21
- Slide 22
- Slide 23
- Slide 24
- Slide 25
- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
7
Coulomb Excitation
Projectile (Z1A1)
Target (Z2A2)
bθ
v
Sommerfeld parameter
ldquoSaferdquo Coulex
Reduced matrix elements
8
REX-ISOLDEIsotopeSeparationOn-Line D-Etector
RIBE-Xperiment
RadioactiveIonBeam 14GeV protons
from PS BoosterA
Heated tungsten line (Ra)
Plasma ion source (Rn)
Ionised atoms diffuse out of target
B
Mass separationin HRS
C
DPost-acceleration
8 UCx
9
MINIBALL REX-ISOLDE
9
220Rn224Ra beam
~283AMeV
Coulex target~2mgcm2
10
MINIBALLbull Particle ID in a Double-Sided Si Strip Detector
bull Event by event Doppler correction
bull 17˚ lt θlab lt 54˚
bull Array of HPGe of 8 triple clusters
bull 6-fold segmentation for positioning
bull ε gt 7 for 13MeV γ-rays
11
Particle-gamma coincidences
Prompt Random
Normalisation = tprompt
trandom
12
Analysis - 224Ra NiSn
60Ni target - 21mgcm2
120Sn target - 20mgcm2
13
Analysis - 220Rn NiSn
60Ni target - 21mgcm2
120Sn target - 23mgcm2
14
Analysis - 220Rn γ-γ
γ(697 keV)
15
Analysis - 220Rn HighLow θ
High CoM θLow CoM θ
16
Analysis - 224Ra Gosia16 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 3- 5- 7- 2+γ)
-- 5
Delayed-coincidence[56] Lifetimes (2+ 4+) -- 2
CdSn high CoM range 239˚ lt θlab lt 403˚
γ-ray yield-- 8 + 7
Ni high CoM range 231˚ lt θlab lt 399˚
γ-ray yield-- 10
CdSn low CoM range 403˚ lt θlab lt 543˚
γ-ray yield-- 8 + 8
Ni low CoM range 393˚ lt θlab lt 532˚
γ-ray yield-- 7
Total 55 data points[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 055
16
17
Results - 224Ra
bull Consistent with rotational model
bull Unstretched E3 matrix elements are non-zero Rot-vib model predicts these vanish
bull Coupled with level energy data we observe a static octupole deformation in 224Ra Awai
ting p
ublicat
ion
Embar
goed b
y Jo
urnal
0+
2+
4+ 1-
3-
5-
3ℏ phonon
18
Analysis - 220Rn Gosia15 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 5- 7-)
-- 3
Delayed-coincidence[56] Lifetimes (2+) -- 1
CdSnNi high CoM range 221˚ lt θlab lt 378˚
γ-ray yield-- 2 + 8 + 5
CdSnNi low CoM range 379˚ lt θlab lt 518˚
γ-ray yield-- 2 + 8 + 5
Total 34 data points
[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 086
19
Results - 220Rn
bull Consistent with rotational model
bull No information on unstretched E3
bull Larger data set required to determine if lt1-||E3||2+gt or lt1-||E3||4+gt vanish
bull Not definitive determination of collective mode dynamic (vibrational) or static (rotational) from Q3 alone
bull δE and Δix implies a coupling of an octupole phonon to the even-spin rotational band
bull Magnitude of Q3 consistent with dynamic picture similar to Q3(208Pb) and Q3(232Th)
bull Dynamic collectivity in 220Rn
Awaiting publication
Embargoed by Journal
20
220Rn - Vibrational
QuickTimetrade and a decompressor
are needed to see this picture
21
Discussion and Interpretation
8 -8
22
Discussion and Interpretation
23
Comparison to theory
Q1
Q2
Q3
bull Cluster model [1] - Misses small Q1
- Q2 is consistently too low- Q3 trend not observed
bull Mean field HFB with D1S or D1M [2]- Predicts cancelation of Q1
- Differences in Q3 predictions
[1] Shneidman et al (2003) Phys Rev C 67(1) 14313
[2] Robledo L M amp Bertsch G F (2011) Phys Rev C 84(5) 54302
Awaiting publicationEmbargoed by Journal
24
Summary amp Outlook
See talk by George OrsquoNeill at 1545 today
bull Demonstrated sensitivity and ability to measure E3 matrix elements with Radioactive Ion Beams (RIBs)
bull B(E3 3- -gt 0+) measured for the first time in Rn and only second measurement in Ra both to ~10 precision
bull Experimental values rule out trend of cluster models
bull Exposes detailed differences in parameterisations of mean field calculations
bull Proposal for measurements in 222226228Ra and Ba region
bull Odd-mass nuclei key to atomic EDM measurements
25
CollaboratorsTE Cocolios J Pakarinen JCederkall D Voulot F Wernander
Th Kroumlll S Boumlnig C Bauer M von SchmidB Bastin
T Grahn A HerzanA Blazhev M Seidlitz N Warr M Albers M Pfeiffer D Radeck
M Rudigier P ThoumlleP van Duppen N Bree J Diriken N Kesteloot
S Sambi K ReyndersL P Gaffney P A Butler M Scheck DT Joss SV Rigby
E KwanT Chupp
D Cline CY WuM Zielinska P Napiorkowski M Kowalczyk
DG JenkinsCERN-ISOLDE SwitzerlandTU Darmstadt GermanyGanil FranceUniversity of Jyvaumlskylauml FinlandUniversity of Koumlln Germany
KU Leuven Belgium
University of Liverpool UK Lawrence Livermore Laboratory USUniversity of Michigan USUniversity of Rochester USHIL University of Warsaw PolandUniversity of York UK
Thank youand the REX-ISOLDE and MINIBALL collaborations
26
Aside - Protons off
bull Evidence of rapid exponential decay in beam rate after protons cease
bull Comparison of direct production vs alpha decay of parent (T12 = 366 days)
27
Radon-220 and Radium-224
220Rn
224Ra
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
- Slide 12
- Slide 13
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Slide 21
- Slide 22
- Slide 23
- Slide 24
- Slide 25
- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
8
REX-ISOLDEIsotopeSeparationOn-Line D-Etector
RIBE-Xperiment
RadioactiveIonBeam 14GeV protons
from PS BoosterA
Heated tungsten line (Ra)
Plasma ion source (Rn)
Ionised atoms diffuse out of target
B
Mass separationin HRS
C
DPost-acceleration
8 UCx
9
MINIBALL REX-ISOLDE
9
220Rn224Ra beam
~283AMeV
Coulex target~2mgcm2
10
MINIBALLbull Particle ID in a Double-Sided Si Strip Detector
bull Event by event Doppler correction
bull 17˚ lt θlab lt 54˚
bull Array of HPGe of 8 triple clusters
bull 6-fold segmentation for positioning
bull ε gt 7 for 13MeV γ-rays
11
Particle-gamma coincidences
Prompt Random
Normalisation = tprompt
trandom
12
Analysis - 224Ra NiSn
60Ni target - 21mgcm2
120Sn target - 20mgcm2
13
Analysis - 220Rn NiSn
60Ni target - 21mgcm2
120Sn target - 23mgcm2
14
Analysis - 220Rn γ-γ
γ(697 keV)
15
Analysis - 220Rn HighLow θ
High CoM θLow CoM θ
16
Analysis - 224Ra Gosia16 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 3- 5- 7- 2+γ)
-- 5
Delayed-coincidence[56] Lifetimes (2+ 4+) -- 2
CdSn high CoM range 239˚ lt θlab lt 403˚
γ-ray yield-- 8 + 7
Ni high CoM range 231˚ lt θlab lt 399˚
γ-ray yield-- 10
CdSn low CoM range 403˚ lt θlab lt 543˚
γ-ray yield-- 8 + 8
Ni low CoM range 393˚ lt θlab lt 532˚
γ-ray yield-- 7
Total 55 data points[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 055
16
17
Results - 224Ra
bull Consistent with rotational model
bull Unstretched E3 matrix elements are non-zero Rot-vib model predicts these vanish
bull Coupled with level energy data we observe a static octupole deformation in 224Ra Awai
ting p
ublicat
ion
Embar
goed b
y Jo
urnal
0+
2+
4+ 1-
3-
5-
3ℏ phonon
18
Analysis - 220Rn Gosia15 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 5- 7-)
-- 3
Delayed-coincidence[56] Lifetimes (2+) -- 1
CdSnNi high CoM range 221˚ lt θlab lt 378˚
γ-ray yield-- 2 + 8 + 5
CdSnNi low CoM range 379˚ lt θlab lt 518˚
γ-ray yield-- 2 + 8 + 5
Total 34 data points
[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 086
19
Results - 220Rn
bull Consistent with rotational model
bull No information on unstretched E3
bull Larger data set required to determine if lt1-||E3||2+gt or lt1-||E3||4+gt vanish
bull Not definitive determination of collective mode dynamic (vibrational) or static (rotational) from Q3 alone
bull δE and Δix implies a coupling of an octupole phonon to the even-spin rotational band
bull Magnitude of Q3 consistent with dynamic picture similar to Q3(208Pb) and Q3(232Th)
bull Dynamic collectivity in 220Rn
Awaiting publication
Embargoed by Journal
20
220Rn - Vibrational
QuickTimetrade and a decompressor
are needed to see this picture
21
Discussion and Interpretation
8 -8
22
Discussion and Interpretation
23
Comparison to theory
Q1
Q2
Q3
bull Cluster model [1] - Misses small Q1
- Q2 is consistently too low- Q3 trend not observed
bull Mean field HFB with D1S or D1M [2]- Predicts cancelation of Q1
- Differences in Q3 predictions
[1] Shneidman et al (2003) Phys Rev C 67(1) 14313
[2] Robledo L M amp Bertsch G F (2011) Phys Rev C 84(5) 54302
Awaiting publicationEmbargoed by Journal
24
Summary amp Outlook
See talk by George OrsquoNeill at 1545 today
bull Demonstrated sensitivity and ability to measure E3 matrix elements with Radioactive Ion Beams (RIBs)
bull B(E3 3- -gt 0+) measured for the first time in Rn and only second measurement in Ra both to ~10 precision
bull Experimental values rule out trend of cluster models
bull Exposes detailed differences in parameterisations of mean field calculations
bull Proposal for measurements in 222226228Ra and Ba region
bull Odd-mass nuclei key to atomic EDM measurements
25
CollaboratorsTE Cocolios J Pakarinen JCederkall D Voulot F Wernander
Th Kroumlll S Boumlnig C Bauer M von SchmidB Bastin
T Grahn A HerzanA Blazhev M Seidlitz N Warr M Albers M Pfeiffer D Radeck
M Rudigier P ThoumlleP van Duppen N Bree J Diriken N Kesteloot
S Sambi K ReyndersL P Gaffney P A Butler M Scheck DT Joss SV Rigby
E KwanT Chupp
D Cline CY WuM Zielinska P Napiorkowski M Kowalczyk
DG JenkinsCERN-ISOLDE SwitzerlandTU Darmstadt GermanyGanil FranceUniversity of Jyvaumlskylauml FinlandUniversity of Koumlln Germany
KU Leuven Belgium
University of Liverpool UK Lawrence Livermore Laboratory USUniversity of Michigan USUniversity of Rochester USHIL University of Warsaw PolandUniversity of York UK
Thank youand the REX-ISOLDE and MINIBALL collaborations
26
Aside - Protons off
bull Evidence of rapid exponential decay in beam rate after protons cease
bull Comparison of direct production vs alpha decay of parent (T12 = 366 days)
27
Radon-220 and Radium-224
220Rn
224Ra
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
- Slide 12
- Slide 13
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Slide 21
- Slide 22
- Slide 23
- Slide 24
- Slide 25
- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
9
MINIBALL REX-ISOLDE
9
220Rn224Ra beam
~283AMeV
Coulex target~2mgcm2
10
MINIBALLbull Particle ID in a Double-Sided Si Strip Detector
bull Event by event Doppler correction
bull 17˚ lt θlab lt 54˚
bull Array of HPGe of 8 triple clusters
bull 6-fold segmentation for positioning
bull ε gt 7 for 13MeV γ-rays
11
Particle-gamma coincidences
Prompt Random
Normalisation = tprompt
trandom
12
Analysis - 224Ra NiSn
60Ni target - 21mgcm2
120Sn target - 20mgcm2
13
Analysis - 220Rn NiSn
60Ni target - 21mgcm2
120Sn target - 23mgcm2
14
Analysis - 220Rn γ-γ
γ(697 keV)
15
Analysis - 220Rn HighLow θ
High CoM θLow CoM θ
16
Analysis - 224Ra Gosia16 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 3- 5- 7- 2+γ)
-- 5
Delayed-coincidence[56] Lifetimes (2+ 4+) -- 2
CdSn high CoM range 239˚ lt θlab lt 403˚
γ-ray yield-- 8 + 7
Ni high CoM range 231˚ lt θlab lt 399˚
γ-ray yield-- 10
CdSn low CoM range 403˚ lt θlab lt 543˚
γ-ray yield-- 8 + 8
Ni low CoM range 393˚ lt θlab lt 532˚
γ-ray yield-- 7
Total 55 data points[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 055
16
17
Results - 224Ra
bull Consistent with rotational model
bull Unstretched E3 matrix elements are non-zero Rot-vib model predicts these vanish
bull Coupled with level energy data we observe a static octupole deformation in 224Ra Awai
ting p
ublicat
ion
Embar
goed b
y Jo
urnal
0+
2+
4+ 1-
3-
5-
3ℏ phonon
18
Analysis - 220Rn Gosia15 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 5- 7-)
-- 3
Delayed-coincidence[56] Lifetimes (2+) -- 1
CdSnNi high CoM range 221˚ lt θlab lt 378˚
γ-ray yield-- 2 + 8 + 5
CdSnNi low CoM range 379˚ lt θlab lt 518˚
γ-ray yield-- 2 + 8 + 5
Total 34 data points
[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 086
19
Results - 220Rn
bull Consistent with rotational model
bull No information on unstretched E3
bull Larger data set required to determine if lt1-||E3||2+gt or lt1-||E3||4+gt vanish
bull Not definitive determination of collective mode dynamic (vibrational) or static (rotational) from Q3 alone
bull δE and Δix implies a coupling of an octupole phonon to the even-spin rotational band
bull Magnitude of Q3 consistent with dynamic picture similar to Q3(208Pb) and Q3(232Th)
bull Dynamic collectivity in 220Rn
Awaiting publication
Embargoed by Journal
20
220Rn - Vibrational
QuickTimetrade and a decompressor
are needed to see this picture
21
Discussion and Interpretation
8 -8
22
Discussion and Interpretation
23
Comparison to theory
Q1
Q2
Q3
bull Cluster model [1] - Misses small Q1
- Q2 is consistently too low- Q3 trend not observed
bull Mean field HFB with D1S or D1M [2]- Predicts cancelation of Q1
- Differences in Q3 predictions
[1] Shneidman et al (2003) Phys Rev C 67(1) 14313
[2] Robledo L M amp Bertsch G F (2011) Phys Rev C 84(5) 54302
Awaiting publicationEmbargoed by Journal
24
Summary amp Outlook
See talk by George OrsquoNeill at 1545 today
bull Demonstrated sensitivity and ability to measure E3 matrix elements with Radioactive Ion Beams (RIBs)
bull B(E3 3- -gt 0+) measured for the first time in Rn and only second measurement in Ra both to ~10 precision
bull Experimental values rule out trend of cluster models
bull Exposes detailed differences in parameterisations of mean field calculations
bull Proposal for measurements in 222226228Ra and Ba region
bull Odd-mass nuclei key to atomic EDM measurements
25
CollaboratorsTE Cocolios J Pakarinen JCederkall D Voulot F Wernander
Th Kroumlll S Boumlnig C Bauer M von SchmidB Bastin
T Grahn A HerzanA Blazhev M Seidlitz N Warr M Albers M Pfeiffer D Radeck
M Rudigier P ThoumlleP van Duppen N Bree J Diriken N Kesteloot
S Sambi K ReyndersL P Gaffney P A Butler M Scheck DT Joss SV Rigby
E KwanT Chupp
D Cline CY WuM Zielinska P Napiorkowski M Kowalczyk
DG JenkinsCERN-ISOLDE SwitzerlandTU Darmstadt GermanyGanil FranceUniversity of Jyvaumlskylauml FinlandUniversity of Koumlln Germany
KU Leuven Belgium
University of Liverpool UK Lawrence Livermore Laboratory USUniversity of Michigan USUniversity of Rochester USHIL University of Warsaw PolandUniversity of York UK
Thank youand the REX-ISOLDE and MINIBALL collaborations
26
Aside - Protons off
bull Evidence of rapid exponential decay in beam rate after protons cease
bull Comparison of direct production vs alpha decay of parent (T12 = 366 days)
27
Radon-220 and Radium-224
220Rn
224Ra
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
- Slide 12
- Slide 13
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Slide 21
- Slide 22
- Slide 23
- Slide 24
- Slide 25
- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
10
MINIBALLbull Particle ID in a Double-Sided Si Strip Detector
bull Event by event Doppler correction
bull 17˚ lt θlab lt 54˚
bull Array of HPGe of 8 triple clusters
bull 6-fold segmentation for positioning
bull ε gt 7 for 13MeV γ-rays
11
Particle-gamma coincidences
Prompt Random
Normalisation = tprompt
trandom
12
Analysis - 224Ra NiSn
60Ni target - 21mgcm2
120Sn target - 20mgcm2
13
Analysis - 220Rn NiSn
60Ni target - 21mgcm2
120Sn target - 23mgcm2
14
Analysis - 220Rn γ-γ
γ(697 keV)
15
Analysis - 220Rn HighLow θ
High CoM θLow CoM θ
16
Analysis - 224Ra Gosia16 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 3- 5- 7- 2+γ)
-- 5
Delayed-coincidence[56] Lifetimes (2+ 4+) -- 2
CdSn high CoM range 239˚ lt θlab lt 403˚
γ-ray yield-- 8 + 7
Ni high CoM range 231˚ lt θlab lt 399˚
γ-ray yield-- 10
CdSn low CoM range 403˚ lt θlab lt 543˚
γ-ray yield-- 8 + 8
Ni low CoM range 393˚ lt θlab lt 532˚
γ-ray yield-- 7
Total 55 data points[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 055
16
17
Results - 224Ra
bull Consistent with rotational model
bull Unstretched E3 matrix elements are non-zero Rot-vib model predicts these vanish
bull Coupled with level energy data we observe a static octupole deformation in 224Ra Awai
ting p
ublicat
ion
Embar
goed b
y Jo
urnal
0+
2+
4+ 1-
3-
5-
3ℏ phonon
18
Analysis - 220Rn Gosia15 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 5- 7-)
-- 3
Delayed-coincidence[56] Lifetimes (2+) -- 1
CdSnNi high CoM range 221˚ lt θlab lt 378˚
γ-ray yield-- 2 + 8 + 5
CdSnNi low CoM range 379˚ lt θlab lt 518˚
γ-ray yield-- 2 + 8 + 5
Total 34 data points
[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 086
19
Results - 220Rn
bull Consistent with rotational model
bull No information on unstretched E3
bull Larger data set required to determine if lt1-||E3||2+gt or lt1-||E3||4+gt vanish
bull Not definitive determination of collective mode dynamic (vibrational) or static (rotational) from Q3 alone
bull δE and Δix implies a coupling of an octupole phonon to the even-spin rotational band
bull Magnitude of Q3 consistent with dynamic picture similar to Q3(208Pb) and Q3(232Th)
bull Dynamic collectivity in 220Rn
Awaiting publication
Embargoed by Journal
20
220Rn - Vibrational
QuickTimetrade and a decompressor
are needed to see this picture
21
Discussion and Interpretation
8 -8
22
Discussion and Interpretation
23
Comparison to theory
Q1
Q2
Q3
bull Cluster model [1] - Misses small Q1
- Q2 is consistently too low- Q3 trend not observed
bull Mean field HFB with D1S or D1M [2]- Predicts cancelation of Q1
- Differences in Q3 predictions
[1] Shneidman et al (2003) Phys Rev C 67(1) 14313
[2] Robledo L M amp Bertsch G F (2011) Phys Rev C 84(5) 54302
Awaiting publicationEmbargoed by Journal
24
Summary amp Outlook
See talk by George OrsquoNeill at 1545 today
bull Demonstrated sensitivity and ability to measure E3 matrix elements with Radioactive Ion Beams (RIBs)
bull B(E3 3- -gt 0+) measured for the first time in Rn and only second measurement in Ra both to ~10 precision
bull Experimental values rule out trend of cluster models
bull Exposes detailed differences in parameterisations of mean field calculations
bull Proposal for measurements in 222226228Ra and Ba region
bull Odd-mass nuclei key to atomic EDM measurements
25
CollaboratorsTE Cocolios J Pakarinen JCederkall D Voulot F Wernander
Th Kroumlll S Boumlnig C Bauer M von SchmidB Bastin
T Grahn A HerzanA Blazhev M Seidlitz N Warr M Albers M Pfeiffer D Radeck
M Rudigier P ThoumlleP van Duppen N Bree J Diriken N Kesteloot
S Sambi K ReyndersL P Gaffney P A Butler M Scheck DT Joss SV Rigby
E KwanT Chupp
D Cline CY WuM Zielinska P Napiorkowski M Kowalczyk
DG JenkinsCERN-ISOLDE SwitzerlandTU Darmstadt GermanyGanil FranceUniversity of Jyvaumlskylauml FinlandUniversity of Koumlln Germany
KU Leuven Belgium
University of Liverpool UK Lawrence Livermore Laboratory USUniversity of Michigan USUniversity of Rochester USHIL University of Warsaw PolandUniversity of York UK
Thank youand the REX-ISOLDE and MINIBALL collaborations
26
Aside - Protons off
bull Evidence of rapid exponential decay in beam rate after protons cease
bull Comparison of direct production vs alpha decay of parent (T12 = 366 days)
27
Radon-220 and Radium-224
220Rn
224Ra
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
- Slide 12
- Slide 13
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Slide 21
- Slide 22
- Slide 23
- Slide 24
- Slide 25
- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
11
Particle-gamma coincidences
Prompt Random
Normalisation = tprompt
trandom
12
Analysis - 224Ra NiSn
60Ni target - 21mgcm2
120Sn target - 20mgcm2
13
Analysis - 220Rn NiSn
60Ni target - 21mgcm2
120Sn target - 23mgcm2
14
Analysis - 220Rn γ-γ
γ(697 keV)
15
Analysis - 220Rn HighLow θ
High CoM θLow CoM θ
16
Analysis - 224Ra Gosia16 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 3- 5- 7- 2+γ)
-- 5
Delayed-coincidence[56] Lifetimes (2+ 4+) -- 2
CdSn high CoM range 239˚ lt θlab lt 403˚
γ-ray yield-- 8 + 7
Ni high CoM range 231˚ lt θlab lt 399˚
γ-ray yield-- 10
CdSn low CoM range 403˚ lt θlab lt 543˚
γ-ray yield-- 8 + 8
Ni low CoM range 393˚ lt θlab lt 532˚
γ-ray yield-- 7
Total 55 data points[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 055
16
17
Results - 224Ra
bull Consistent with rotational model
bull Unstretched E3 matrix elements are non-zero Rot-vib model predicts these vanish
bull Coupled with level energy data we observe a static octupole deformation in 224Ra Awai
ting p
ublicat
ion
Embar
goed b
y Jo
urnal
0+
2+
4+ 1-
3-
5-
3ℏ phonon
18
Analysis - 220Rn Gosia15 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 5- 7-)
-- 3
Delayed-coincidence[56] Lifetimes (2+) -- 1
CdSnNi high CoM range 221˚ lt θlab lt 378˚
γ-ray yield-- 2 + 8 + 5
CdSnNi low CoM range 379˚ lt θlab lt 518˚
γ-ray yield-- 2 + 8 + 5
Total 34 data points
[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 086
19
Results - 220Rn
bull Consistent with rotational model
bull No information on unstretched E3
bull Larger data set required to determine if lt1-||E3||2+gt or lt1-||E3||4+gt vanish
bull Not definitive determination of collective mode dynamic (vibrational) or static (rotational) from Q3 alone
bull δE and Δix implies a coupling of an octupole phonon to the even-spin rotational band
bull Magnitude of Q3 consistent with dynamic picture similar to Q3(208Pb) and Q3(232Th)
bull Dynamic collectivity in 220Rn
Awaiting publication
Embargoed by Journal
20
220Rn - Vibrational
QuickTimetrade and a decompressor
are needed to see this picture
21
Discussion and Interpretation
8 -8
22
Discussion and Interpretation
23
Comparison to theory
Q1
Q2
Q3
bull Cluster model [1] - Misses small Q1
- Q2 is consistently too low- Q3 trend not observed
bull Mean field HFB with D1S or D1M [2]- Predicts cancelation of Q1
- Differences in Q3 predictions
[1] Shneidman et al (2003) Phys Rev C 67(1) 14313
[2] Robledo L M amp Bertsch G F (2011) Phys Rev C 84(5) 54302
Awaiting publicationEmbargoed by Journal
24
Summary amp Outlook
See talk by George OrsquoNeill at 1545 today
bull Demonstrated sensitivity and ability to measure E3 matrix elements with Radioactive Ion Beams (RIBs)
bull B(E3 3- -gt 0+) measured for the first time in Rn and only second measurement in Ra both to ~10 precision
bull Experimental values rule out trend of cluster models
bull Exposes detailed differences in parameterisations of mean field calculations
bull Proposal for measurements in 222226228Ra and Ba region
bull Odd-mass nuclei key to atomic EDM measurements
25
CollaboratorsTE Cocolios J Pakarinen JCederkall D Voulot F Wernander
Th Kroumlll S Boumlnig C Bauer M von SchmidB Bastin
T Grahn A HerzanA Blazhev M Seidlitz N Warr M Albers M Pfeiffer D Radeck
M Rudigier P ThoumlleP van Duppen N Bree J Diriken N Kesteloot
S Sambi K ReyndersL P Gaffney P A Butler M Scheck DT Joss SV Rigby
E KwanT Chupp
D Cline CY WuM Zielinska P Napiorkowski M Kowalczyk
DG JenkinsCERN-ISOLDE SwitzerlandTU Darmstadt GermanyGanil FranceUniversity of Jyvaumlskylauml FinlandUniversity of Koumlln Germany
KU Leuven Belgium
University of Liverpool UK Lawrence Livermore Laboratory USUniversity of Michigan USUniversity of Rochester USHIL University of Warsaw PolandUniversity of York UK
Thank youand the REX-ISOLDE and MINIBALL collaborations
26
Aside - Protons off
bull Evidence of rapid exponential decay in beam rate after protons cease
bull Comparison of direct production vs alpha decay of parent (T12 = 366 days)
27
Radon-220 and Radium-224
220Rn
224Ra
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
- Slide 12
- Slide 13
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Slide 21
- Slide 22
- Slide 23
- Slide 24
- Slide 25
- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
12
Analysis - 224Ra NiSn
60Ni target - 21mgcm2
120Sn target - 20mgcm2
13
Analysis - 220Rn NiSn
60Ni target - 21mgcm2
120Sn target - 23mgcm2
14
Analysis - 220Rn γ-γ
γ(697 keV)
15
Analysis - 220Rn HighLow θ
High CoM θLow CoM θ
16
Analysis - 224Ra Gosia16 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 3- 5- 7- 2+γ)
-- 5
Delayed-coincidence[56] Lifetimes (2+ 4+) -- 2
CdSn high CoM range 239˚ lt θlab lt 403˚
γ-ray yield-- 8 + 7
Ni high CoM range 231˚ lt θlab lt 399˚
γ-ray yield-- 10
CdSn low CoM range 403˚ lt θlab lt 543˚
γ-ray yield-- 8 + 8
Ni low CoM range 393˚ lt θlab lt 532˚
γ-ray yield-- 7
Total 55 data points[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 055
16
17
Results - 224Ra
bull Consistent with rotational model
bull Unstretched E3 matrix elements are non-zero Rot-vib model predicts these vanish
bull Coupled with level energy data we observe a static octupole deformation in 224Ra Awai
ting p
ublicat
ion
Embar
goed b
y Jo
urnal
0+
2+
4+ 1-
3-
5-
3ℏ phonon
18
Analysis - 220Rn Gosia15 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 5- 7-)
-- 3
Delayed-coincidence[56] Lifetimes (2+) -- 1
CdSnNi high CoM range 221˚ lt θlab lt 378˚
γ-ray yield-- 2 + 8 + 5
CdSnNi low CoM range 379˚ lt θlab lt 518˚
γ-ray yield-- 2 + 8 + 5
Total 34 data points
[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 086
19
Results - 220Rn
bull Consistent with rotational model
bull No information on unstretched E3
bull Larger data set required to determine if lt1-||E3||2+gt or lt1-||E3||4+gt vanish
bull Not definitive determination of collective mode dynamic (vibrational) or static (rotational) from Q3 alone
bull δE and Δix implies a coupling of an octupole phonon to the even-spin rotational band
bull Magnitude of Q3 consistent with dynamic picture similar to Q3(208Pb) and Q3(232Th)
bull Dynamic collectivity in 220Rn
Awaiting publication
Embargoed by Journal
20
220Rn - Vibrational
QuickTimetrade and a decompressor
are needed to see this picture
21
Discussion and Interpretation
8 -8
22
Discussion and Interpretation
23
Comparison to theory
Q1
Q2
Q3
bull Cluster model [1] - Misses small Q1
- Q2 is consistently too low- Q3 trend not observed
bull Mean field HFB with D1S or D1M [2]- Predicts cancelation of Q1
- Differences in Q3 predictions
[1] Shneidman et al (2003) Phys Rev C 67(1) 14313
[2] Robledo L M amp Bertsch G F (2011) Phys Rev C 84(5) 54302
Awaiting publicationEmbargoed by Journal
24
Summary amp Outlook
See talk by George OrsquoNeill at 1545 today
bull Demonstrated sensitivity and ability to measure E3 matrix elements with Radioactive Ion Beams (RIBs)
bull B(E3 3- -gt 0+) measured for the first time in Rn and only second measurement in Ra both to ~10 precision
bull Experimental values rule out trend of cluster models
bull Exposes detailed differences in parameterisations of mean field calculations
bull Proposal for measurements in 222226228Ra and Ba region
bull Odd-mass nuclei key to atomic EDM measurements
25
CollaboratorsTE Cocolios J Pakarinen JCederkall D Voulot F Wernander
Th Kroumlll S Boumlnig C Bauer M von SchmidB Bastin
T Grahn A HerzanA Blazhev M Seidlitz N Warr M Albers M Pfeiffer D Radeck
M Rudigier P ThoumlleP van Duppen N Bree J Diriken N Kesteloot
S Sambi K ReyndersL P Gaffney P A Butler M Scheck DT Joss SV Rigby
E KwanT Chupp
D Cline CY WuM Zielinska P Napiorkowski M Kowalczyk
DG JenkinsCERN-ISOLDE SwitzerlandTU Darmstadt GermanyGanil FranceUniversity of Jyvaumlskylauml FinlandUniversity of Koumlln Germany
KU Leuven Belgium
University of Liverpool UK Lawrence Livermore Laboratory USUniversity of Michigan USUniversity of Rochester USHIL University of Warsaw PolandUniversity of York UK
Thank youand the REX-ISOLDE and MINIBALL collaborations
26
Aside - Protons off
bull Evidence of rapid exponential decay in beam rate after protons cease
bull Comparison of direct production vs alpha decay of parent (T12 = 366 days)
27
Radon-220 and Radium-224
220Rn
224Ra
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
- Slide 12
- Slide 13
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Slide 21
- Slide 22
- Slide 23
- Slide 24
- Slide 25
- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
13
Analysis - 220Rn NiSn
60Ni target - 21mgcm2
120Sn target - 23mgcm2
14
Analysis - 220Rn γ-γ
γ(697 keV)
15
Analysis - 220Rn HighLow θ
High CoM θLow CoM θ
16
Analysis - 224Ra Gosia16 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 3- 5- 7- 2+γ)
-- 5
Delayed-coincidence[56] Lifetimes (2+ 4+) -- 2
CdSn high CoM range 239˚ lt θlab lt 403˚
γ-ray yield-- 8 + 7
Ni high CoM range 231˚ lt θlab lt 399˚
γ-ray yield-- 10
CdSn low CoM range 403˚ lt θlab lt 543˚
γ-ray yield-- 8 + 8
Ni low CoM range 393˚ lt θlab lt 532˚
γ-ray yield-- 7
Total 55 data points[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 055
16
17
Results - 224Ra
bull Consistent with rotational model
bull Unstretched E3 matrix elements are non-zero Rot-vib model predicts these vanish
bull Coupled with level energy data we observe a static octupole deformation in 224Ra Awai
ting p
ublicat
ion
Embar
goed b
y Jo
urnal
0+
2+
4+ 1-
3-
5-
3ℏ phonon
18
Analysis - 220Rn Gosia15 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 5- 7-)
-- 3
Delayed-coincidence[56] Lifetimes (2+) -- 1
CdSnNi high CoM range 221˚ lt θlab lt 378˚
γ-ray yield-- 2 + 8 + 5
CdSnNi low CoM range 379˚ lt θlab lt 518˚
γ-ray yield-- 2 + 8 + 5
Total 34 data points
[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 086
19
Results - 220Rn
bull Consistent with rotational model
bull No information on unstretched E3
bull Larger data set required to determine if lt1-||E3||2+gt or lt1-||E3||4+gt vanish
bull Not definitive determination of collective mode dynamic (vibrational) or static (rotational) from Q3 alone
bull δE and Δix implies a coupling of an octupole phonon to the even-spin rotational band
bull Magnitude of Q3 consistent with dynamic picture similar to Q3(208Pb) and Q3(232Th)
bull Dynamic collectivity in 220Rn
Awaiting publication
Embargoed by Journal
20
220Rn - Vibrational
QuickTimetrade and a decompressor
are needed to see this picture
21
Discussion and Interpretation
8 -8
22
Discussion and Interpretation
23
Comparison to theory
Q1
Q2
Q3
bull Cluster model [1] - Misses small Q1
- Q2 is consistently too low- Q3 trend not observed
bull Mean field HFB with D1S or D1M [2]- Predicts cancelation of Q1
- Differences in Q3 predictions
[1] Shneidman et al (2003) Phys Rev C 67(1) 14313
[2] Robledo L M amp Bertsch G F (2011) Phys Rev C 84(5) 54302
Awaiting publicationEmbargoed by Journal
24
Summary amp Outlook
See talk by George OrsquoNeill at 1545 today
bull Demonstrated sensitivity and ability to measure E3 matrix elements with Radioactive Ion Beams (RIBs)
bull B(E3 3- -gt 0+) measured for the first time in Rn and only second measurement in Ra both to ~10 precision
bull Experimental values rule out trend of cluster models
bull Exposes detailed differences in parameterisations of mean field calculations
bull Proposal for measurements in 222226228Ra and Ba region
bull Odd-mass nuclei key to atomic EDM measurements
25
CollaboratorsTE Cocolios J Pakarinen JCederkall D Voulot F Wernander
Th Kroumlll S Boumlnig C Bauer M von SchmidB Bastin
T Grahn A HerzanA Blazhev M Seidlitz N Warr M Albers M Pfeiffer D Radeck
M Rudigier P ThoumlleP van Duppen N Bree J Diriken N Kesteloot
S Sambi K ReyndersL P Gaffney P A Butler M Scheck DT Joss SV Rigby
E KwanT Chupp
D Cline CY WuM Zielinska P Napiorkowski M Kowalczyk
DG JenkinsCERN-ISOLDE SwitzerlandTU Darmstadt GermanyGanil FranceUniversity of Jyvaumlskylauml FinlandUniversity of Koumlln Germany
KU Leuven Belgium
University of Liverpool UK Lawrence Livermore Laboratory USUniversity of Michigan USUniversity of Rochester USHIL University of Warsaw PolandUniversity of York UK
Thank youand the REX-ISOLDE and MINIBALL collaborations
26
Aside - Protons off
bull Evidence of rapid exponential decay in beam rate after protons cease
bull Comparison of direct production vs alpha decay of parent (T12 = 366 days)
27
Radon-220 and Radium-224
220Rn
224Ra
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
- Slide 12
- Slide 13
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Slide 21
- Slide 22
- Slide 23
- Slide 24
- Slide 25
- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
14
Analysis - 220Rn γ-γ
γ(697 keV)
15
Analysis - 220Rn HighLow θ
High CoM θLow CoM θ
16
Analysis - 224Ra Gosia16 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 3- 5- 7- 2+γ)
-- 5
Delayed-coincidence[56] Lifetimes (2+ 4+) -- 2
CdSn high CoM range 239˚ lt θlab lt 403˚
γ-ray yield-- 8 + 7
Ni high CoM range 231˚ lt θlab lt 399˚
γ-ray yield-- 10
CdSn low CoM range 403˚ lt θlab lt 543˚
γ-ray yield-- 8 + 8
Ni low CoM range 393˚ lt θlab lt 532˚
γ-ray yield-- 7
Total 55 data points[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 055
16
17
Results - 224Ra
bull Consistent with rotational model
bull Unstretched E3 matrix elements are non-zero Rot-vib model predicts these vanish
bull Coupled with level energy data we observe a static octupole deformation in 224Ra Awai
ting p
ublicat
ion
Embar
goed b
y Jo
urnal
0+
2+
4+ 1-
3-
5-
3ℏ phonon
18
Analysis - 220Rn Gosia15 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 5- 7-)
-- 3
Delayed-coincidence[56] Lifetimes (2+) -- 1
CdSnNi high CoM range 221˚ lt θlab lt 378˚
γ-ray yield-- 2 + 8 + 5
CdSnNi low CoM range 379˚ lt θlab lt 518˚
γ-ray yield-- 2 + 8 + 5
Total 34 data points
[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 086
19
Results - 220Rn
bull Consistent with rotational model
bull No information on unstretched E3
bull Larger data set required to determine if lt1-||E3||2+gt or lt1-||E3||4+gt vanish
bull Not definitive determination of collective mode dynamic (vibrational) or static (rotational) from Q3 alone
bull δE and Δix implies a coupling of an octupole phonon to the even-spin rotational band
bull Magnitude of Q3 consistent with dynamic picture similar to Q3(208Pb) and Q3(232Th)
bull Dynamic collectivity in 220Rn
Awaiting publication
Embargoed by Journal
20
220Rn - Vibrational
QuickTimetrade and a decompressor
are needed to see this picture
21
Discussion and Interpretation
8 -8
22
Discussion and Interpretation
23
Comparison to theory
Q1
Q2
Q3
bull Cluster model [1] - Misses small Q1
- Q2 is consistently too low- Q3 trend not observed
bull Mean field HFB with D1S or D1M [2]- Predicts cancelation of Q1
- Differences in Q3 predictions
[1] Shneidman et al (2003) Phys Rev C 67(1) 14313
[2] Robledo L M amp Bertsch G F (2011) Phys Rev C 84(5) 54302
Awaiting publicationEmbargoed by Journal
24
Summary amp Outlook
See talk by George OrsquoNeill at 1545 today
bull Demonstrated sensitivity and ability to measure E3 matrix elements with Radioactive Ion Beams (RIBs)
bull B(E3 3- -gt 0+) measured for the first time in Rn and only second measurement in Ra both to ~10 precision
bull Experimental values rule out trend of cluster models
bull Exposes detailed differences in parameterisations of mean field calculations
bull Proposal for measurements in 222226228Ra and Ba region
bull Odd-mass nuclei key to atomic EDM measurements
25
CollaboratorsTE Cocolios J Pakarinen JCederkall D Voulot F Wernander
Th Kroumlll S Boumlnig C Bauer M von SchmidB Bastin
T Grahn A HerzanA Blazhev M Seidlitz N Warr M Albers M Pfeiffer D Radeck
M Rudigier P ThoumlleP van Duppen N Bree J Diriken N Kesteloot
S Sambi K ReyndersL P Gaffney P A Butler M Scheck DT Joss SV Rigby
E KwanT Chupp
D Cline CY WuM Zielinska P Napiorkowski M Kowalczyk
DG JenkinsCERN-ISOLDE SwitzerlandTU Darmstadt GermanyGanil FranceUniversity of Jyvaumlskylauml FinlandUniversity of Koumlln Germany
KU Leuven Belgium
University of Liverpool UK Lawrence Livermore Laboratory USUniversity of Michigan USUniversity of Rochester USHIL University of Warsaw PolandUniversity of York UK
Thank youand the REX-ISOLDE and MINIBALL collaborations
26
Aside - Protons off
bull Evidence of rapid exponential decay in beam rate after protons cease
bull Comparison of direct production vs alpha decay of parent (T12 = 366 days)
27
Radon-220 and Radium-224
220Rn
224Ra
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
- Slide 12
- Slide 13
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Slide 21
- Slide 22
- Slide 23
- Slide 24
- Slide 25
- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
15
Analysis - 220Rn HighLow θ
High CoM θLow CoM θ
16
Analysis - 224Ra Gosia16 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 3- 5- 7- 2+γ)
-- 5
Delayed-coincidence[56] Lifetimes (2+ 4+) -- 2
CdSn high CoM range 239˚ lt θlab lt 403˚
γ-ray yield-- 8 + 7
Ni high CoM range 231˚ lt θlab lt 399˚
γ-ray yield-- 10
CdSn low CoM range 403˚ lt θlab lt 543˚
γ-ray yield-- 8 + 8
Ni low CoM range 393˚ lt θlab lt 532˚
γ-ray yield-- 7
Total 55 data points[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 055
16
17
Results - 224Ra
bull Consistent with rotational model
bull Unstretched E3 matrix elements are non-zero Rot-vib model predicts these vanish
bull Coupled with level energy data we observe a static octupole deformation in 224Ra Awai
ting p
ublicat
ion
Embar
goed b
y Jo
urnal
0+
2+
4+ 1-
3-
5-
3ℏ phonon
18
Analysis - 220Rn Gosia15 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 5- 7-)
-- 3
Delayed-coincidence[56] Lifetimes (2+) -- 1
CdSnNi high CoM range 221˚ lt θlab lt 378˚
γ-ray yield-- 2 + 8 + 5
CdSnNi low CoM range 379˚ lt θlab lt 518˚
γ-ray yield-- 2 + 8 + 5
Total 34 data points
[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 086
19
Results - 220Rn
bull Consistent with rotational model
bull No information on unstretched E3
bull Larger data set required to determine if lt1-||E3||2+gt or lt1-||E3||4+gt vanish
bull Not definitive determination of collective mode dynamic (vibrational) or static (rotational) from Q3 alone
bull δE and Δix implies a coupling of an octupole phonon to the even-spin rotational band
bull Magnitude of Q3 consistent with dynamic picture similar to Q3(208Pb) and Q3(232Th)
bull Dynamic collectivity in 220Rn
Awaiting publication
Embargoed by Journal
20
220Rn - Vibrational
QuickTimetrade and a decompressor
are needed to see this picture
21
Discussion and Interpretation
8 -8
22
Discussion and Interpretation
23
Comparison to theory
Q1
Q2
Q3
bull Cluster model [1] - Misses small Q1
- Q2 is consistently too low- Q3 trend not observed
bull Mean field HFB with D1S or D1M [2]- Predicts cancelation of Q1
- Differences in Q3 predictions
[1] Shneidman et al (2003) Phys Rev C 67(1) 14313
[2] Robledo L M amp Bertsch G F (2011) Phys Rev C 84(5) 54302
Awaiting publicationEmbargoed by Journal
24
Summary amp Outlook
See talk by George OrsquoNeill at 1545 today
bull Demonstrated sensitivity and ability to measure E3 matrix elements with Radioactive Ion Beams (RIBs)
bull B(E3 3- -gt 0+) measured for the first time in Rn and only second measurement in Ra both to ~10 precision
bull Experimental values rule out trend of cluster models
bull Exposes detailed differences in parameterisations of mean field calculations
bull Proposal for measurements in 222226228Ra and Ba region
bull Odd-mass nuclei key to atomic EDM measurements
25
CollaboratorsTE Cocolios J Pakarinen JCederkall D Voulot F Wernander
Th Kroumlll S Boumlnig C Bauer M von SchmidB Bastin
T Grahn A HerzanA Blazhev M Seidlitz N Warr M Albers M Pfeiffer D Radeck
M Rudigier P ThoumlleP van Duppen N Bree J Diriken N Kesteloot
S Sambi K ReyndersL P Gaffney P A Butler M Scheck DT Joss SV Rigby
E KwanT Chupp
D Cline CY WuM Zielinska P Napiorkowski M Kowalczyk
DG JenkinsCERN-ISOLDE SwitzerlandTU Darmstadt GermanyGanil FranceUniversity of Jyvaumlskylauml FinlandUniversity of Koumlln Germany
KU Leuven Belgium
University of Liverpool UK Lawrence Livermore Laboratory USUniversity of Michigan USUniversity of Rochester USHIL University of Warsaw PolandUniversity of York UK
Thank youand the REX-ISOLDE and MINIBALL collaborations
26
Aside - Protons off
bull Evidence of rapid exponential decay in beam rate after protons cease
bull Comparison of direct production vs alpha decay of parent (T12 = 366 days)
27
Radon-220 and Radium-224
220Rn
224Ra
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
- Slide 12
- Slide 13
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Slide 21
- Slide 22
- Slide 23
- Slide 24
- Slide 25
- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
16
Analysis - 224Ra Gosia16 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 3- 5- 7- 2+γ)
-- 5
Delayed-coincidence[56] Lifetimes (2+ 4+) -- 2
CdSn high CoM range 239˚ lt θlab lt 403˚
γ-ray yield-- 8 + 7
Ni high CoM range 231˚ lt θlab lt 399˚
γ-ray yield-- 10
CdSn low CoM range 403˚ lt θlab lt 543˚
γ-ray yield-- 8 + 8
Ni low CoM range 393˚ lt θlab lt 532˚
γ-ray yield-- 7
Total 55 data points[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 055
16
17
Results - 224Ra
bull Consistent with rotational model
bull Unstretched E3 matrix elements are non-zero Rot-vib model predicts these vanish
bull Coupled with level energy data we observe a static octupole deformation in 224Ra Awai
ting p
ublicat
ion
Embar
goed b
y Jo
urnal
0+
2+
4+ 1-
3-
5-
3ℏ phonon
18
Analysis - 220Rn Gosia15 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 5- 7-)
-- 3
Delayed-coincidence[56] Lifetimes (2+) -- 1
CdSnNi high CoM range 221˚ lt θlab lt 378˚
γ-ray yield-- 2 + 8 + 5
CdSnNi low CoM range 379˚ lt θlab lt 518˚
γ-ray yield-- 2 + 8 + 5
Total 34 data points
[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 086
19
Results - 220Rn
bull Consistent with rotational model
bull No information on unstretched E3
bull Larger data set required to determine if lt1-||E3||2+gt or lt1-||E3||4+gt vanish
bull Not definitive determination of collective mode dynamic (vibrational) or static (rotational) from Q3 alone
bull δE and Δix implies a coupling of an octupole phonon to the even-spin rotational band
bull Magnitude of Q3 consistent with dynamic picture similar to Q3(208Pb) and Q3(232Th)
bull Dynamic collectivity in 220Rn
Awaiting publication
Embargoed by Journal
20
220Rn - Vibrational
QuickTimetrade and a decompressor
are needed to see this picture
21
Discussion and Interpretation
8 -8
22
Discussion and Interpretation
23
Comparison to theory
Q1
Q2
Q3
bull Cluster model [1] - Misses small Q1
- Q2 is consistently too low- Q3 trend not observed
bull Mean field HFB with D1S or D1M [2]- Predicts cancelation of Q1
- Differences in Q3 predictions
[1] Shneidman et al (2003) Phys Rev C 67(1) 14313
[2] Robledo L M amp Bertsch G F (2011) Phys Rev C 84(5) 54302
Awaiting publicationEmbargoed by Journal
24
Summary amp Outlook
See talk by George OrsquoNeill at 1545 today
bull Demonstrated sensitivity and ability to measure E3 matrix elements with Radioactive Ion Beams (RIBs)
bull B(E3 3- -gt 0+) measured for the first time in Rn and only second measurement in Ra both to ~10 precision
bull Experimental values rule out trend of cluster models
bull Exposes detailed differences in parameterisations of mean field calculations
bull Proposal for measurements in 222226228Ra and Ba region
bull Odd-mass nuclei key to atomic EDM measurements
25
CollaboratorsTE Cocolios J Pakarinen JCederkall D Voulot F Wernander
Th Kroumlll S Boumlnig C Bauer M von SchmidB Bastin
T Grahn A HerzanA Blazhev M Seidlitz N Warr M Albers M Pfeiffer D Radeck
M Rudigier P ThoumlleP van Duppen N Bree J Diriken N Kesteloot
S Sambi K ReyndersL P Gaffney P A Butler M Scheck DT Joss SV Rigby
E KwanT Chupp
D Cline CY WuM Zielinska P Napiorkowski M Kowalczyk
DG JenkinsCERN-ISOLDE SwitzerlandTU Darmstadt GermanyGanil FranceUniversity of Jyvaumlskylauml FinlandUniversity of Koumlln Germany
KU Leuven Belgium
University of Liverpool UK Lawrence Livermore Laboratory USUniversity of Michigan USUniversity of Rochester USHIL University of Warsaw PolandUniversity of York UK
Thank youand the REX-ISOLDE and MINIBALL collaborations
26
Aside - Protons off
bull Evidence of rapid exponential decay in beam rate after protons cease
bull Comparison of direct production vs alpha decay of parent (T12 = 366 days)
27
Radon-220 and Radium-224
220Rn
224Ra
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
- Slide 12
- Slide 13
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Slide 21
- Slide 22
- Slide 23
- Slide 24
- Slide 25
- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
17
Results - 224Ra
bull Consistent with rotational model
bull Unstretched E3 matrix elements are non-zero Rot-vib model predicts these vanish
bull Coupled with level energy data we observe a static octupole deformation in 224Ra Awai
ting p
ublicat
ion
Embar
goed b
y Jo
urnal
0+
2+
4+ 1-
3-
5-
3ℏ phonon
18
Analysis - 220Rn Gosia15 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 5- 7-)
-- 3
Delayed-coincidence[56] Lifetimes (2+) -- 1
CdSnNi high CoM range 221˚ lt θlab lt 378˚
γ-ray yield-- 2 + 8 + 5
CdSnNi low CoM range 379˚ lt θlab lt 518˚
γ-ray yield-- 2 + 8 + 5
Total 34 data points
[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 086
19
Results - 220Rn
bull Consistent with rotational model
bull No information on unstretched E3
bull Larger data set required to determine if lt1-||E3||2+gt or lt1-||E3||4+gt vanish
bull Not definitive determination of collective mode dynamic (vibrational) or static (rotational) from Q3 alone
bull δE and Δix implies a coupling of an octupole phonon to the even-spin rotational band
bull Magnitude of Q3 consistent with dynamic picture similar to Q3(208Pb) and Q3(232Th)
bull Dynamic collectivity in 220Rn
Awaiting publication
Embargoed by Journal
20
220Rn - Vibrational
QuickTimetrade and a decompressor
are needed to see this picture
21
Discussion and Interpretation
8 -8
22
Discussion and Interpretation
23
Comparison to theory
Q1
Q2
Q3
bull Cluster model [1] - Misses small Q1
- Q2 is consistently too low- Q3 trend not observed
bull Mean field HFB with D1S or D1M [2]- Predicts cancelation of Q1
- Differences in Q3 predictions
[1] Shneidman et al (2003) Phys Rev C 67(1) 14313
[2] Robledo L M amp Bertsch G F (2011) Phys Rev C 84(5) 54302
Awaiting publicationEmbargoed by Journal
24
Summary amp Outlook
See talk by George OrsquoNeill at 1545 today
bull Demonstrated sensitivity and ability to measure E3 matrix elements with Radioactive Ion Beams (RIBs)
bull B(E3 3- -gt 0+) measured for the first time in Rn and only second measurement in Ra both to ~10 precision
bull Experimental values rule out trend of cluster models
bull Exposes detailed differences in parameterisations of mean field calculations
bull Proposal for measurements in 222226228Ra and Ba region
bull Odd-mass nuclei key to atomic EDM measurements
25
CollaboratorsTE Cocolios J Pakarinen JCederkall D Voulot F Wernander
Th Kroumlll S Boumlnig C Bauer M von SchmidB Bastin
T Grahn A HerzanA Blazhev M Seidlitz N Warr M Albers M Pfeiffer D Radeck
M Rudigier P ThoumlleP van Duppen N Bree J Diriken N Kesteloot
S Sambi K ReyndersL P Gaffney P A Butler M Scheck DT Joss SV Rigby
E KwanT Chupp
D Cline CY WuM Zielinska P Napiorkowski M Kowalczyk
DG JenkinsCERN-ISOLDE SwitzerlandTU Darmstadt GermanyGanil FranceUniversity of Jyvaumlskylauml FinlandUniversity of Koumlln Germany
KU Leuven Belgium
University of Liverpool UK Lawrence Livermore Laboratory USUniversity of Michigan USUniversity of Rochester USHIL University of Warsaw PolandUniversity of York UK
Thank youand the REX-ISOLDE and MINIBALL collaborations
26
Aside - Protons off
bull Evidence of rapid exponential decay in beam rate after protons cease
bull Comparison of direct production vs alpha decay of parent (T12 = 366 days)
27
Radon-220 and Radium-224
220Rn
224Ra
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
- Slide 12
- Slide 13
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Slide 21
- Slide 22
- Slide 23
- Slide 24
- Slide 25
- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
18
Analysis - 220Rn Gosia15 free matrix elements + 6 normalisation factors
ldquoExperimentrdquo Number and type of data
Multi-nucleon transfer[12]
226Ra(58Ni60Ni)224Ra 232Th(136Xe128Te)224RaAlpha alpha-prime[3]
226Ra(ααrsquo2n)224RaAlpha(beta)-decay[4]
228Th(224Fr) rarr α(β)
Branching ratios (1- 5- 7-)
-- 3
Delayed-coincidence[56] Lifetimes (2+) -- 1
CdSnNi high CoM range 221˚ lt θlab lt 378˚
γ-ray yield-- 2 + 8 + 5
CdSnNi low CoM range 379˚ lt θlab lt 518˚
γ-ray yield-- 2 + 8 + 5
Total 34 data points
[1] Poynter et al Phys Lett B 232 447 (1989)[2] JFC Cocks et al Nucl Phys A 645 61 (1999)[3] Marten-Toumllle et al Z Phys A 336 27 (1990)[4] W Kurcewicz et al Nucl Phys A 289 (1977)[5] WR Neal and HW Kraner Phys Rev 137 B1164 (1965)[6] H Ton et al Nucl Phys A 155 235 (1970)
χ2 = 086
19
Results - 220Rn
bull Consistent with rotational model
bull No information on unstretched E3
bull Larger data set required to determine if lt1-||E3||2+gt or lt1-||E3||4+gt vanish
bull Not definitive determination of collective mode dynamic (vibrational) or static (rotational) from Q3 alone
bull δE and Δix implies a coupling of an octupole phonon to the even-spin rotational band
bull Magnitude of Q3 consistent with dynamic picture similar to Q3(208Pb) and Q3(232Th)
bull Dynamic collectivity in 220Rn
Awaiting publication
Embargoed by Journal
20
220Rn - Vibrational
QuickTimetrade and a decompressor
are needed to see this picture
21
Discussion and Interpretation
8 -8
22
Discussion and Interpretation
23
Comparison to theory
Q1
Q2
Q3
bull Cluster model [1] - Misses small Q1
- Q2 is consistently too low- Q3 trend not observed
bull Mean field HFB with D1S or D1M [2]- Predicts cancelation of Q1
- Differences in Q3 predictions
[1] Shneidman et al (2003) Phys Rev C 67(1) 14313
[2] Robledo L M amp Bertsch G F (2011) Phys Rev C 84(5) 54302
Awaiting publicationEmbargoed by Journal
24
Summary amp Outlook
See talk by George OrsquoNeill at 1545 today
bull Demonstrated sensitivity and ability to measure E3 matrix elements with Radioactive Ion Beams (RIBs)
bull B(E3 3- -gt 0+) measured for the first time in Rn and only second measurement in Ra both to ~10 precision
bull Experimental values rule out trend of cluster models
bull Exposes detailed differences in parameterisations of mean field calculations
bull Proposal for measurements in 222226228Ra and Ba region
bull Odd-mass nuclei key to atomic EDM measurements
25
CollaboratorsTE Cocolios J Pakarinen JCederkall D Voulot F Wernander
Th Kroumlll S Boumlnig C Bauer M von SchmidB Bastin
T Grahn A HerzanA Blazhev M Seidlitz N Warr M Albers M Pfeiffer D Radeck
M Rudigier P ThoumlleP van Duppen N Bree J Diriken N Kesteloot
S Sambi K ReyndersL P Gaffney P A Butler M Scheck DT Joss SV Rigby
E KwanT Chupp
D Cline CY WuM Zielinska P Napiorkowski M Kowalczyk
DG JenkinsCERN-ISOLDE SwitzerlandTU Darmstadt GermanyGanil FranceUniversity of Jyvaumlskylauml FinlandUniversity of Koumlln Germany
KU Leuven Belgium
University of Liverpool UK Lawrence Livermore Laboratory USUniversity of Michigan USUniversity of Rochester USHIL University of Warsaw PolandUniversity of York UK
Thank youand the REX-ISOLDE and MINIBALL collaborations
26
Aside - Protons off
bull Evidence of rapid exponential decay in beam rate after protons cease
bull Comparison of direct production vs alpha decay of parent (T12 = 366 days)
27
Radon-220 and Radium-224
220Rn
224Ra
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
- Slide 12
- Slide 13
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Slide 21
- Slide 22
- Slide 23
- Slide 24
- Slide 25
- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
19
Results - 220Rn
bull Consistent with rotational model
bull No information on unstretched E3
bull Larger data set required to determine if lt1-||E3||2+gt or lt1-||E3||4+gt vanish
bull Not definitive determination of collective mode dynamic (vibrational) or static (rotational) from Q3 alone
bull δE and Δix implies a coupling of an octupole phonon to the even-spin rotational band
bull Magnitude of Q3 consistent with dynamic picture similar to Q3(208Pb) and Q3(232Th)
bull Dynamic collectivity in 220Rn
Awaiting publication
Embargoed by Journal
20
220Rn - Vibrational
QuickTimetrade and a decompressor
are needed to see this picture
21
Discussion and Interpretation
8 -8
22
Discussion and Interpretation
23
Comparison to theory
Q1
Q2
Q3
bull Cluster model [1] - Misses small Q1
- Q2 is consistently too low- Q3 trend not observed
bull Mean field HFB with D1S or D1M [2]- Predicts cancelation of Q1
- Differences in Q3 predictions
[1] Shneidman et al (2003) Phys Rev C 67(1) 14313
[2] Robledo L M amp Bertsch G F (2011) Phys Rev C 84(5) 54302
Awaiting publicationEmbargoed by Journal
24
Summary amp Outlook
See talk by George OrsquoNeill at 1545 today
bull Demonstrated sensitivity and ability to measure E3 matrix elements with Radioactive Ion Beams (RIBs)
bull B(E3 3- -gt 0+) measured for the first time in Rn and only second measurement in Ra both to ~10 precision
bull Experimental values rule out trend of cluster models
bull Exposes detailed differences in parameterisations of mean field calculations
bull Proposal for measurements in 222226228Ra and Ba region
bull Odd-mass nuclei key to atomic EDM measurements
25
CollaboratorsTE Cocolios J Pakarinen JCederkall D Voulot F Wernander
Th Kroumlll S Boumlnig C Bauer M von SchmidB Bastin
T Grahn A HerzanA Blazhev M Seidlitz N Warr M Albers M Pfeiffer D Radeck
M Rudigier P ThoumlleP van Duppen N Bree J Diriken N Kesteloot
S Sambi K ReyndersL P Gaffney P A Butler M Scheck DT Joss SV Rigby
E KwanT Chupp
D Cline CY WuM Zielinska P Napiorkowski M Kowalczyk
DG JenkinsCERN-ISOLDE SwitzerlandTU Darmstadt GermanyGanil FranceUniversity of Jyvaumlskylauml FinlandUniversity of Koumlln Germany
KU Leuven Belgium
University of Liverpool UK Lawrence Livermore Laboratory USUniversity of Michigan USUniversity of Rochester USHIL University of Warsaw PolandUniversity of York UK
Thank youand the REX-ISOLDE and MINIBALL collaborations
26
Aside - Protons off
bull Evidence of rapid exponential decay in beam rate after protons cease
bull Comparison of direct production vs alpha decay of parent (T12 = 366 days)
27
Radon-220 and Radium-224
220Rn
224Ra
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
- Slide 12
- Slide 13
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Slide 21
- Slide 22
- Slide 23
- Slide 24
- Slide 25
- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
20
220Rn - Vibrational
QuickTimetrade and a decompressor
are needed to see this picture
21
Discussion and Interpretation
8 -8
22
Discussion and Interpretation
23
Comparison to theory
Q1
Q2
Q3
bull Cluster model [1] - Misses small Q1
- Q2 is consistently too low- Q3 trend not observed
bull Mean field HFB with D1S or D1M [2]- Predicts cancelation of Q1
- Differences in Q3 predictions
[1] Shneidman et al (2003) Phys Rev C 67(1) 14313
[2] Robledo L M amp Bertsch G F (2011) Phys Rev C 84(5) 54302
Awaiting publicationEmbargoed by Journal
24
Summary amp Outlook
See talk by George OrsquoNeill at 1545 today
bull Demonstrated sensitivity and ability to measure E3 matrix elements with Radioactive Ion Beams (RIBs)
bull B(E3 3- -gt 0+) measured for the first time in Rn and only second measurement in Ra both to ~10 precision
bull Experimental values rule out trend of cluster models
bull Exposes detailed differences in parameterisations of mean field calculations
bull Proposal for measurements in 222226228Ra and Ba region
bull Odd-mass nuclei key to atomic EDM measurements
25
CollaboratorsTE Cocolios J Pakarinen JCederkall D Voulot F Wernander
Th Kroumlll S Boumlnig C Bauer M von SchmidB Bastin
T Grahn A HerzanA Blazhev M Seidlitz N Warr M Albers M Pfeiffer D Radeck
M Rudigier P ThoumlleP van Duppen N Bree J Diriken N Kesteloot
S Sambi K ReyndersL P Gaffney P A Butler M Scheck DT Joss SV Rigby
E KwanT Chupp
D Cline CY WuM Zielinska P Napiorkowski M Kowalczyk
DG JenkinsCERN-ISOLDE SwitzerlandTU Darmstadt GermanyGanil FranceUniversity of Jyvaumlskylauml FinlandUniversity of Koumlln Germany
KU Leuven Belgium
University of Liverpool UK Lawrence Livermore Laboratory USUniversity of Michigan USUniversity of Rochester USHIL University of Warsaw PolandUniversity of York UK
Thank youand the REX-ISOLDE and MINIBALL collaborations
26
Aside - Protons off
bull Evidence of rapid exponential decay in beam rate after protons cease
bull Comparison of direct production vs alpha decay of parent (T12 = 366 days)
27
Radon-220 and Radium-224
220Rn
224Ra
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
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- Slide 19
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- Slide 21
- Slide 22
- Slide 23
- Slide 24
- Slide 25
- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
21
Discussion and Interpretation
8 -8
22
Discussion and Interpretation
23
Comparison to theory
Q1
Q2
Q3
bull Cluster model [1] - Misses small Q1
- Q2 is consistently too low- Q3 trend not observed
bull Mean field HFB with D1S or D1M [2]- Predicts cancelation of Q1
- Differences in Q3 predictions
[1] Shneidman et al (2003) Phys Rev C 67(1) 14313
[2] Robledo L M amp Bertsch G F (2011) Phys Rev C 84(5) 54302
Awaiting publicationEmbargoed by Journal
24
Summary amp Outlook
See talk by George OrsquoNeill at 1545 today
bull Demonstrated sensitivity and ability to measure E3 matrix elements with Radioactive Ion Beams (RIBs)
bull B(E3 3- -gt 0+) measured for the first time in Rn and only second measurement in Ra both to ~10 precision
bull Experimental values rule out trend of cluster models
bull Exposes detailed differences in parameterisations of mean field calculations
bull Proposal for measurements in 222226228Ra and Ba region
bull Odd-mass nuclei key to atomic EDM measurements
25
CollaboratorsTE Cocolios J Pakarinen JCederkall D Voulot F Wernander
Th Kroumlll S Boumlnig C Bauer M von SchmidB Bastin
T Grahn A HerzanA Blazhev M Seidlitz N Warr M Albers M Pfeiffer D Radeck
M Rudigier P ThoumlleP van Duppen N Bree J Diriken N Kesteloot
S Sambi K ReyndersL P Gaffney P A Butler M Scheck DT Joss SV Rigby
E KwanT Chupp
D Cline CY WuM Zielinska P Napiorkowski M Kowalczyk
DG JenkinsCERN-ISOLDE SwitzerlandTU Darmstadt GermanyGanil FranceUniversity of Jyvaumlskylauml FinlandUniversity of Koumlln Germany
KU Leuven Belgium
University of Liverpool UK Lawrence Livermore Laboratory USUniversity of Michigan USUniversity of Rochester USHIL University of Warsaw PolandUniversity of York UK
Thank youand the REX-ISOLDE and MINIBALL collaborations
26
Aside - Protons off
bull Evidence of rapid exponential decay in beam rate after protons cease
bull Comparison of direct production vs alpha decay of parent (T12 = 366 days)
27
Radon-220 and Radium-224
220Rn
224Ra
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
- Slide 12
- Slide 13
- Slide 14
- Slide 15
- Slide 16
- Slide 17
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- Slide 19
- Slide 20
- Slide 21
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- Slide 23
- Slide 24
- Slide 25
- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
22
Discussion and Interpretation
23
Comparison to theory
Q1
Q2
Q3
bull Cluster model [1] - Misses small Q1
- Q2 is consistently too low- Q3 trend not observed
bull Mean field HFB with D1S or D1M [2]- Predicts cancelation of Q1
- Differences in Q3 predictions
[1] Shneidman et al (2003) Phys Rev C 67(1) 14313
[2] Robledo L M amp Bertsch G F (2011) Phys Rev C 84(5) 54302
Awaiting publicationEmbargoed by Journal
24
Summary amp Outlook
See talk by George OrsquoNeill at 1545 today
bull Demonstrated sensitivity and ability to measure E3 matrix elements with Radioactive Ion Beams (RIBs)
bull B(E3 3- -gt 0+) measured for the first time in Rn and only second measurement in Ra both to ~10 precision
bull Experimental values rule out trend of cluster models
bull Exposes detailed differences in parameterisations of mean field calculations
bull Proposal for measurements in 222226228Ra and Ba region
bull Odd-mass nuclei key to atomic EDM measurements
25
CollaboratorsTE Cocolios J Pakarinen JCederkall D Voulot F Wernander
Th Kroumlll S Boumlnig C Bauer M von SchmidB Bastin
T Grahn A HerzanA Blazhev M Seidlitz N Warr M Albers M Pfeiffer D Radeck
M Rudigier P ThoumlleP van Duppen N Bree J Diriken N Kesteloot
S Sambi K ReyndersL P Gaffney P A Butler M Scheck DT Joss SV Rigby
E KwanT Chupp
D Cline CY WuM Zielinska P Napiorkowski M Kowalczyk
DG JenkinsCERN-ISOLDE SwitzerlandTU Darmstadt GermanyGanil FranceUniversity of Jyvaumlskylauml FinlandUniversity of Koumlln Germany
KU Leuven Belgium
University of Liverpool UK Lawrence Livermore Laboratory USUniversity of Michigan USUniversity of Rochester USHIL University of Warsaw PolandUniversity of York UK
Thank youand the REX-ISOLDE and MINIBALL collaborations
26
Aside - Protons off
bull Evidence of rapid exponential decay in beam rate after protons cease
bull Comparison of direct production vs alpha decay of parent (T12 = 366 days)
27
Radon-220 and Radium-224
220Rn
224Ra
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
- Slide 12
- Slide 13
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Slide 21
- Slide 22
- Slide 23
- Slide 24
- Slide 25
- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
23
Comparison to theory
Q1
Q2
Q3
bull Cluster model [1] - Misses small Q1
- Q2 is consistently too low- Q3 trend not observed
bull Mean field HFB with D1S or D1M [2]- Predicts cancelation of Q1
- Differences in Q3 predictions
[1] Shneidman et al (2003) Phys Rev C 67(1) 14313
[2] Robledo L M amp Bertsch G F (2011) Phys Rev C 84(5) 54302
Awaiting publicationEmbargoed by Journal
24
Summary amp Outlook
See talk by George OrsquoNeill at 1545 today
bull Demonstrated sensitivity and ability to measure E3 matrix elements with Radioactive Ion Beams (RIBs)
bull B(E3 3- -gt 0+) measured for the first time in Rn and only second measurement in Ra both to ~10 precision
bull Experimental values rule out trend of cluster models
bull Exposes detailed differences in parameterisations of mean field calculations
bull Proposal for measurements in 222226228Ra and Ba region
bull Odd-mass nuclei key to atomic EDM measurements
25
CollaboratorsTE Cocolios J Pakarinen JCederkall D Voulot F Wernander
Th Kroumlll S Boumlnig C Bauer M von SchmidB Bastin
T Grahn A HerzanA Blazhev M Seidlitz N Warr M Albers M Pfeiffer D Radeck
M Rudigier P ThoumlleP van Duppen N Bree J Diriken N Kesteloot
S Sambi K ReyndersL P Gaffney P A Butler M Scheck DT Joss SV Rigby
E KwanT Chupp
D Cline CY WuM Zielinska P Napiorkowski M Kowalczyk
DG JenkinsCERN-ISOLDE SwitzerlandTU Darmstadt GermanyGanil FranceUniversity of Jyvaumlskylauml FinlandUniversity of Koumlln Germany
KU Leuven Belgium
University of Liverpool UK Lawrence Livermore Laboratory USUniversity of Michigan USUniversity of Rochester USHIL University of Warsaw PolandUniversity of York UK
Thank youand the REX-ISOLDE and MINIBALL collaborations
26
Aside - Protons off
bull Evidence of rapid exponential decay in beam rate after protons cease
bull Comparison of direct production vs alpha decay of parent (T12 = 366 days)
27
Radon-220 and Radium-224
220Rn
224Ra
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
- Slide 12
- Slide 13
- Slide 14
- Slide 15
- Slide 16
- Slide 17
- Slide 18
- Slide 19
- Slide 20
- Slide 21
- Slide 22
- Slide 23
- Slide 24
- Slide 25
- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
24
Summary amp Outlook
See talk by George OrsquoNeill at 1545 today
bull Demonstrated sensitivity and ability to measure E3 matrix elements with Radioactive Ion Beams (RIBs)
bull B(E3 3- -gt 0+) measured for the first time in Rn and only second measurement in Ra both to ~10 precision
bull Experimental values rule out trend of cluster models
bull Exposes detailed differences in parameterisations of mean field calculations
bull Proposal for measurements in 222226228Ra and Ba region
bull Odd-mass nuclei key to atomic EDM measurements
25
CollaboratorsTE Cocolios J Pakarinen JCederkall D Voulot F Wernander
Th Kroumlll S Boumlnig C Bauer M von SchmidB Bastin
T Grahn A HerzanA Blazhev M Seidlitz N Warr M Albers M Pfeiffer D Radeck
M Rudigier P ThoumlleP van Duppen N Bree J Diriken N Kesteloot
S Sambi K ReyndersL P Gaffney P A Butler M Scheck DT Joss SV Rigby
E KwanT Chupp
D Cline CY WuM Zielinska P Napiorkowski M Kowalczyk
DG JenkinsCERN-ISOLDE SwitzerlandTU Darmstadt GermanyGanil FranceUniversity of Jyvaumlskylauml FinlandUniversity of Koumlln Germany
KU Leuven Belgium
University of Liverpool UK Lawrence Livermore Laboratory USUniversity of Michigan USUniversity of Rochester USHIL University of Warsaw PolandUniversity of York UK
Thank youand the REX-ISOLDE and MINIBALL collaborations
26
Aside - Protons off
bull Evidence of rapid exponential decay in beam rate after protons cease
bull Comparison of direct production vs alpha decay of parent (T12 = 366 days)
27
Radon-220 and Radium-224
220Rn
224Ra
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
- Slide 12
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- Slide 24
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- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
25
CollaboratorsTE Cocolios J Pakarinen JCederkall D Voulot F Wernander
Th Kroumlll S Boumlnig C Bauer M von SchmidB Bastin
T Grahn A HerzanA Blazhev M Seidlitz N Warr M Albers M Pfeiffer D Radeck
M Rudigier P ThoumlleP van Duppen N Bree J Diriken N Kesteloot
S Sambi K ReyndersL P Gaffney P A Butler M Scheck DT Joss SV Rigby
E KwanT Chupp
D Cline CY WuM Zielinska P Napiorkowski M Kowalczyk
DG JenkinsCERN-ISOLDE SwitzerlandTU Darmstadt GermanyGanil FranceUniversity of Jyvaumlskylauml FinlandUniversity of Koumlln Germany
KU Leuven Belgium
University of Liverpool UK Lawrence Livermore Laboratory USUniversity of Michigan USUniversity of Rochester USHIL University of Warsaw PolandUniversity of York UK
Thank youand the REX-ISOLDE and MINIBALL collaborations
26
Aside - Protons off
bull Evidence of rapid exponential decay in beam rate after protons cease
bull Comparison of direct production vs alpha decay of parent (T12 = 366 days)
27
Radon-220 and Radium-224
220Rn
224Ra
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
- Slide 12
- Slide 13
- Slide 14
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- Slide 25
- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
26
Aside - Protons off
bull Evidence of rapid exponential decay in beam rate after protons cease
bull Comparison of direct production vs alpha decay of parent (T12 = 366 days)
27
Radon-220 and Radium-224
220Rn
224Ra
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
- Slide 12
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- Slide 16
- Slide 17
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- Slide 24
- Slide 25
- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
27
Radon-220 and Radium-224
220Rn
224Ra
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
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- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
28
Simulation - 224Ra
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
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- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
29
Simulation - 224Ra
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
- Slide 12
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- Slide 21
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- Slide 24
- Slide 25
- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
30
Gosia Analysis
Measured E2 matrix elements [efm2]
TransitionalDiagonal
Measured E3 matrix elements [efm3]
StretchedUn-stretched
[Ref] H J Wollersheim et al Nucl Phys A 556 261 (1993)
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
- Slide 11
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- Slide 13
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- Slide 25
- Slide 26
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- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
31
Gosia Analysis
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
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- Slide 26
- Slide 27
- Slide 28
- Slide 29
- Slide 30
- Slide 31
- Slide 32
-
32
Discussion and Interpretation - 224Ra
- Slide 1
- Slide 2
- Slide 3
- Slide 4
- Slide 5
- Slide 6
- Slide 7
- Slide 8
- Slide 9
- Slide 10
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-