HIE-ISOLDE Project Y. Kadi (EN-STI) On behalf of the HIE-ISOLDE Coordination team.
MINIBALL g -ray Spectroscopy far from Stability Overview Physics C ase MINIBALL @ REX-ISOLDE ...
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Transcript of MINIBALL g -ray Spectroscopy far from Stability Overview Physics C ase MINIBALL @ REX-ISOLDE ...
MINIBALL g-ray Spectroscopy far from Stability
• Overview Physics Case• MINIBALL @ REX-ISOLDE• ‚Island of Inversion‘ Results• Perspectives with HIE-ISOLDE
Peter ReiterIKP, University of Cologne
for the MINIBALL collaboration
Nuclear Structure and Dynamics Opatija, Croatia, July 9. – 13., 2012
Shell Model Physics with MINIBALL@REX-ISOLDE
transfer reactions at N=28 (Darmstadt, Munich)
46Ar
“Island of inversion” N=20Coulomb excitation &
transfer reactions (Darmstadt, Cologne,
Munich) 28,29,30Na29,30,31,32Mg Towards the doubly magic 78Ni
with Coulomb excitation and nucleontransfer reactions around 68Ni
(CERN, Leuven, Munich) 66,67,68Ni 67,68,69,70,71,73Cu 72,74,76,78,79,80Zn
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
Phys. Rev. C 84, 064323 (2011)Phys. Rev. C 82, 064309 (2010)Phys. Rev. C. 79, 014309 (2009)Phys. Rev. Lett. 100, 112502 (2008)Phys. Rev. C. 78, 047301 (2008)Phys. Rev. Lett. 99, 142501 (2007)Phys. Rev. Lett. 98, 122701 (2007)
Phys. Lett. B, 700 ( 2011) 181Phys. Rev. Lett. 105, 252501 (2010)Phys. Rev. Lett. 103, 012501 (2009)Phys. Rev. Lett. 94, 172501 (2005)
B(E2) measurements around 132Sn(Darmstadt, Munich)
122,124,128Cd138,140,142,144Xe 140,142,148Ba
g-factors in Te isotopes(Darmstadt, Madrid)
132,134,136Te
Shell Model Physics with MINIBALL@REX-ISOLDETowards the doubly magic 100Sn
(Lund, CERN) 106,107,108,109,110Sn
107,108In100,102,104Cd
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
Eur. Phys. J. A 44 (2010) 355Phys. Rev. C 80, 054302 (2009)Phys. Rev. Lett. 101, 012502 (2008)Phys. Rev. Lett. 98, 172501 (2007)
Shapes & collectivity with MINIBALL@REX-ISOLDE
Shapes and collectivity between Kr and Sr
(York, Cologne, Munich, Orsay,Grenoble, Saclay)
72Kr 88,92,94,96Kr 93,95,97,99Rb
96Sr
Shapes and collectivity
in the rare earth region
(Darmstadt, Saclay, Oslo)
138,140Nd140,142Sm 142Gd 144Dy
Collectivity near Z=50(York, Darmstadt)
116,118Te
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
Phys.Rev.Lett. 108, 062701 (2012)Phys.Rev.Lett. 98, 072501 (2007)
Octupole collectivityin heavy Rn, Ra isotopes
(Liverpool) 220,222Rn 222,224Ra
Shapes & collectivity with MINIBALL@REX-ISOLDE
Shapes in Hg, Pb, Po nuclei(Liverpool, Leuven, Jyväskylä) 182,184,186,188Hg 188,190,192,194,196,198Pb
198,200,202Po
Shapes and collectivityin light Po, Rn nuclei
(York, Jyväskylä)206Po
202,204Rn
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
The MINIBALLCoulomb excitation setup
segmented Si detector for particle detection (DSSSD)• 16 rings (front side)• 96 strips (back side)• angle coverage: θlab = 16-55°• ΔE-E measurement possible
(pad)
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
RIB production at ISOLDE
RIB Production:• 1,4 GeV protons• various targets• ionization• mass separation in
GPS/HRS• 800 RIBs available
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
Isomeric beams @ ISOLDE
6-
1+ (g.s.)
68Cu6- (g.s.)
1+
70Cu 3-
1+
6-
0
722
6-
1+
0
242
3-
101
• technique based on in-source laser spectroscopy (U. Köster et al., NIM B160, 528 (2000), L. Weissman et al., PRC 65, 024315 (2000))
• set the laser frequency to select and maximize the production
of the isomer of interest
g-Spectroscopy with Cu isomer beams: I. Stefanescu et al. PRL 98, 122701 (2007), E. Rapisarda et al. PRC 84, 064323 (2011)
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
Z=28 N=28
• realistic interaction (M. Hjorth-Jensen et al., Phys.Rep.26 (2004)
• model space: 1f5/2 2p3/2 2p1/2 1g9/2
outside 56Ni inert core;
SMI Calculations by N. Smirnova• hybrid interaction (S.Lenzi et al., PRC82, 05430(2010))
• model space:1f7/2 1f5/2 2p3/2 2p1/2 protons
1f5/22p3/22p1/21g9/22d5/2 neutrons 48Ca inert core
Coulomb excitation of isomeric states of 70Cu
SMII Calculations by K. Sieja
1g9/2
2p1/2
2p3/2
1f5/2
• NO proton-core excitations
• NO neutron-core excitations
Systematics of 6- 4- transition
Z=20 N=28
2p1/2
2p3/2
1f5/2
1f7/2
2d5/2
Neutrons excitations across N=50
Proton excitations across Z=28
1g9/2
RIB preparation @ REX-ISOLDE
Re-acceleration• acceleration of the ions in
the REX-LINAC• beam energy: 0,8-3,0 MeV/u
Acceleration up to Ra achieved
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
Charge breeding:• cooling and bunching of
the RIB in the REXTRAP• breeding to higher
charge states in the EBIS to A/q<4.5• breeding time up to 400
ms• A/q selection
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
224Ra (+120Sn) Coulomb excitation
P.A. Butler1, L.P. Gaffney1, M. Scheck1,2, F. Wenander3, for the IS475 collaboration1University of Liverpool, UK , 2Technical University Darmstadt, Germany, 3CERN-ISOLDE
- Heaviest REX-ISOLDE beam
- B(E3, 0+ ↦ 3-)
E.K. Warburton, J. A. Becker and B. A. Brown, PRC 41 (1990) 1147.
20
s1/2
f7/2
d5/2
d3/2
p3/2f7/2
d3/2
p3/2
d5/2
s1/2
0p0h, spherical 2p2h (intruder), deformed
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
0+
2+
30Mg
E2
32Mg… 38Mg
E2
2+
0+
T. Motobayashi, et al.; PLB 346 (1995) P Doornenbal et al
30,31,32Mg, 30Na
0+
0+
2+
30Mg 32Mg
???
31Mg
E0 E2E2
inversion normalsd
configurations
intruderfp
configurations
2+
0+
0+
Where are the borders?
How does transition into island of inversion occur ?
Does picture of shape coexistence hold?
d3/2
+f7/2
-
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
H. Scheit et al; in prep.M. Seidlitz et al; Phys. Lett. B 700 (2011) 181
O. Niedermeier et al. Phys. Rev. Lett. 94, 172501 (2005)
Neutron number
Coulomb excitation of 30,32Mg
‚Safe‘ energy Coulomb excitation at 2.25 MeV/u
MINIBALL measures with small uncertaintyB(E2) values from first excited 2+ statesto ground state in 30,32Mg
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
G. Neyens et al., PRL 94, 022501 (2005)D. Yordanov et al., PRL 99, 212501 (2007)
laser spectroscopy and -NMRg-factor and spin for 31Mg and 33Mgfrom sign of g-factor parity
31Mg, Ip = 1/2+ (sd)-3 (fp)2
33Mg, Ip = 3/2- (sd)-2(fp)3
pure 2p-2h intruder ground states !
Al28
Al29
Al30
Al31
Al32
Al33
Al34
Al35
Al36
Mg27
Mg28
Mg29
Mg30
Mg31
Mg32
Mg33
Mg34
Mg35
20
d3/2
+f7/2
-
20
31Mg (N=19)
d3/2
20
33Mg (N=21)f7/2
Normal ground state configurations:
Ip=3/2+ Ip=7/2-
pf
sd
Intruder ground state configurations:
20
31Mg (N=19)
d3/2
Ip=1/2+
20
33Mg (N=21)
Ip=3/2-
g-factor and spin of the 31,33Mg ground state
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
Renewed -decay studies31Mg F. Maréchal et al., PRC 72, 044314 (2005)33Mg V. Tripathi et al., PRL 101, 142504 (2008)
Coulomb excitation 31Mg
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
31Mg Results
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
M. Seidlitz et al; PLB 700 (2011) 181 G. Neyens, Phys. Rev. C 84, 064310 (2011)M. Kimura, Phys. Rev. C 75, 041302(R) (2007)
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
Coulomb excitation of 30Na, higher lying states?
B(E2, 2+ → (4+)) = 108 (33) e2fm4 (preliminary!)
theoretical predictions: B(E2, 2+ → 4+) = 90 e2fm4
background subtracted, Doppler corrected for 30Na30Na ((3+) → 2+)
30Na ((4+) → (3+))30Na ((4+) → 2+)
beam time: 80 hoursbeam intensity: 550 ions/sec
more beam time Oct. 2012
0+
0+
2+
30Mg 32Mg
???
31Mg
E0 E2E2
inversion normalsd
configurations
intruderfp
configurations
2+
0+
0+
Does picture of shape coexistence hold?
d3/2
+f7/2
-
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
Shape coexistence in 30Mg
30Mg 32Mg 0+
1
0+2 0+
2
0+1
W. Schwerdtfeger, et al; PRL 103, 012501 (2009)
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
- electron spectroscopy after -decay at ISOLDE- first excited 0+ state at 1789 keV in 30Mg
The MINIBALL T-REX setup
RIB
• large solid angle (58% of 4π)• position sensitive• PID (ΔE-E): p, d, t, α, … and e- from β-decay (!)
V. Bildstein, K. Wimmer,Th. Kröll, R. Gernhäuser et al. (funded by TU München,KU Leuven, U Edinburgh, CSNSM Orsay, TU Darmstadt)
T-REX: Si detector array for Transfer experiments at REX-ISOLDE
Technical details:Barrel: 140 mm ΔE / 16 resistive strips 1000 mm E / padBackward CD: 500 mm ΔE / DSSSD 500 mm E / pad
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
t(30Mg, 32Mg)p – two-neutron transfer
• 3H loaded Ti foil (40 mg/cm2 3H, 10 GBq)• 30Mg @ 2 MeV/u• 4·104 part/s / 150 h beam on target• Q00 = -295(20) keV• Two states populated: ground state and new state at 1083(33) keV
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
K. Wimmer et al; PRL 105, 252501 (2010)
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
normalsd
configurations
intruderfp
configurations
K. Heyde, J.L. Wood, REV. OF MOD. PHYS., Vol 83, (2011) 1467S. Grévy et al,; ARIS2011 proceedings
0+ 2719
0+
0+2+
30Mg 32Mg
E0 E2E2
2+
0+
0+
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
d(66Ni,67Ni)p – the 68Ni region (N=40)
preliminaryJ. Diriken, P. van Duppen, R. Raabe, et al.; IKS-KU Leuven for the IS469 collaboration
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
d(66Ni,67Ni)p – the 68Ni region (N=40)
J. Diriken, P. van Duppen, R. Raabe, et al.; IKS-KU Leuven for the IS469 collaboration
preliminary
• proton gated g-spectrum• g-transitions up to 5800 keV• p-g-g- coincidence analysis
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
d(66Ni,67Ni)p – the 68Ni region (N=40)
Ex=3600(250) keV
Eg=3619(30) keV
Ex [
keV
]
Eg [keV]
shell closure at N=40?
NNDC
High resolution of MINIBALL allows to resolve states and to analyse angular distribution
preliminary
J. Diriken, P. van Duppen, R. Raabe, et al.; IKS-KU Leuven for the IS469 collaboration
HIE-ISOLDE
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
• intensity upgrade• energy upgrade
2014
2016
1.2 MeV/u
3 MeV/u
5.5 MeV/u
10 MeV/u
8 MeV/u
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
Transfer reactions at HIE-ISOLDEHigher energies at HIE-ISOLDE will be favorable for transfer reaction studies with heavy beams!
Show case example: d(132Sn,133Sn)p
FRESCO calc‘s by K. Wimmer (NSCL, MSU)
Several HIE-ISOLDE LoIs based onMINIBALL & T-REX:- shell evolution- shape coexistence- pairing correlations ó pair transfer- nuclear astrophysics: (d,p) ó (n,g) capture reactions
Upgrade of T-REX -> flexiblegeometry of Si detectors
Fusion veto detector
Spectrometer to identify heavy transfer products
Summary• MINIBALL spectrometer very well suited for REX-ISOLDE• Physics case covers the range from 17F to 224Ra• First years: Shell model physics and Coulomb excitation• Recent developments: - isomeric and heavy beams - T-REX transfer reactions & g-ray spectroscopy • Major perspective: HIE-ISOLDE
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
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HIE-ISOLDEOutline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
● MINIBALL + T-REX● New instrumentation:
MAYA/ACTAR active target SPEDE - SPectrometer for Electron DEtection in radioactive beamHELIOS superconducting magnet for charged particle detectionPARIS (Photon Array for studies with Radioactive Ion and Stable beams) GASPARD (GAmma Spectroscopy and PArticle Detection)Neutron detectorsTSR storage ring
● Magnetic spectrometer or separator for channel selection
Mark Huyse, IKS K.U. Leuven ISOLDE workshop 2010
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
C. Thibault, et al.; PRC 12 (1975) 644
‚Island of Inversion‘First and recent results from ISOLDE
masses show considerable deviations for nuclei around Z=11, N=20. additional binding energy
Charge radii differences from isotope shift measurement D.T. Yordanov, et al.; PRL 108 (2012) 042504
RIB preparation @ REX-ISOLDE
Charge breeding:• cooling and bunching of
the RIB in the REXTRAP• breeding to higher
charge states in the EBIS to A/q<4.5• breeding time up to 400
ms• A/q selectionPossibility of in-trap decay during charge breeding:
61Mn → 61Fe
J. Van de Walle et al., CERN-INTC-2009-006 (2009)
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
6-fold segmented, encapsulated MINIBALL detector
Collaboration: Köln, Heidelberg, München, Leuven
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
Triple cluster detector3 x core + 3 x 6 segmentsIKP Köln and CTT
PreamplifierIKP KölnMPI-K Hd
Digital high resolution spectroscopy electronics
40 MHz digitizer: DGF 4C Company XIA
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
Pulse shape analysis and position sensitivity
in-beam data:(line width after Doppler correction) Abs. Eff. 8 %, ΔΘ = 3.30
Deviations from classical shell model
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
Transfer to ground state in 32Mgg.s. occupation numbers using effective USD / SDPF-M interactions:B. H. Wildenthal, Prog. Part. Nucl. Phys. 1, 5 (1984) T. Otsuka et al., Prog. Part. Nucl. Phys. 47, 319 (2001)
Transfer to ground state in 32Mg• pure transfer to (f7/2)2 to small • large contribution from (p3/2)2 needed (a > 0.7) SDPF-M underestimates the p3/2 content in the wave functions
Transfer to excited 0+ state in 32Mg• wave function similar to g.s. in 30Mg• two-neutron spectroscopic amplitudes for pure sd → sd transitions • cross section underestimated, small (p3/2)2 amplitude (a ≈ 0.3)
a
Transfer to excited 0+ state in 32Mg
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
K. Wimmer et al; PRL 105, 252501 (2010)
Shape coexistence in 30Mg
W. Schwerdtfeger, et al; PRL 103, 012501 (2009)
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
electric monopole (E0) transition to ground state: r2(E0)= (26.2 (7.5)) x 10-3
beyond-mean-field calculations with Gogny force:• two competing configurations, small mixing • largely different intrinsic quadrupole deformation • ground state: 1d3/2 neutrons• first excited 0+ state: 1f7/2 neutrons
predictions for 32Mg
Beam quality, monitoring, quantitative composition
Laser ON
Laser OFF
Measured with ionization chamber (ΔE-Erest)at the MINIBALL beam dump position
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
Short term perspectivesOutline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
• 2011 campaign- Coulex experiments: 188;..,198Pb, 140Nd, 96Kr, 220Rn, 208Rn, 128Cd, 72Kr, 30Na, 98Sr- transfer experiments- g-factor measurements
Discussion of physics campaign during CERN shut down periodMINIBALL workshopUniversity of Cologne 27.-28. February or March 5.-6. March 2012.
• 2012 campaign
• 2013 CERN shut down
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
t(44Ar,46Ar)p – probing N=28
Analysis by K. Nowak, TU München)Spokesperson: K. Wimmer
Identified protons g-rays in coincidence with protons
Transfer to gs of 46Ar
Weakening of N=28 closure below 48Ca?è onset of deformation / shape coexistence? Search for the second 0+ state
O. Niedermeier, et al., Phys. Rev. Lett. 94, 172501 (2005)
Neutron number
Coulomb excitation of 30,32Mg
‚Safe‘ energy Coulomb excitation at 2.25 MeV/u
MINIBALL measures with small uncertaintyB(E2) values from first excited 2+ statesto ground state in 30,32Mg
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
E.K. Warburton, J. A. Becker and B. A. Brown, PRC 41 (1990) 1147.
20
s1/2
f7/2
d5/2
d3/2
p3/2f7/2
d3/2
p3/2
d5/2
s1/2
0p0h, spherical 2p2h (intruder)
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
0+
2+
30Mg
E2
32Mg
E2
2+
0+
T. Motobayashi, et al.; PLB 346 (1995) 9
30,31,32Mg, 30Na
886
792 722
660 660
collective properties of 31Mg
F. Maréchal et al., Phys. Rev. C 72, 044314 (2005)M. Kimura, Phys. Rev. C 75, 041302(R) (2007)
- -decay studies of 31Mg at GANIL
- shell model calculation sd-fp valence space ANTOINE code, effective interaction SDPF-NR
collective properties of positive K=1/2 rotational band of 31Mg:excitation energy, quadrupole moment Q, B(E2), magnetic moment μ, B(M1)
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
GOSIA Coulex calculationResults:- one step E2 excitation
- decay of (5/2+,3/2+) level via M1 transition
- results confirms strong collective
excitation - rotational sequence: 1/2+ → 3/2+ → 5/2+
B(M1, 5/2+→ 3/2+)=0.1 – 0.5 µn
2
B(E2, 1/2+→5/2+) = 182 e2fm4
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
M. Seidlitz et al; PLB 700 (2011) 181M. Kimura, Phys. Rev. C 75, 041302(R) (2007)
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
Collective properties of the Na-Isotopes
B(E2, 2+ → (3+)) = 147 (21) e2fm4
(Ettenauer et al., Phys. Rev. C 78, 017302, 2008)
Y. Ut
suno
, et
al.,
Phys
. Rev
. C70
, 044
307,
200
4
B(E2, 3/2+ → (5/2+)) = 140 (25) e2fm4
(Hurst et al., Phys. Lett. B 674, 168-171, 2009)theoretical predictions:B(E2, 3/2+ → 5/2+) = 111-135 e2fm4
B(E2, 3/2+ → 7/2+) = 57 e2fm4
theoretical predictions:B(E2, 2+ → 3+) = 168 e2fm4
B(E2, 2+ → 4+) = 90 e2fm4
The „Island of Inversion“
(5/2+)
? (3+) ?
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
Coulomb excitation of 30Na, higher lying states?
B(E2, 2+ → (4+)) = 108 (33) e2fm4 (preliminary!)
theoretical predictions: B(E2, 2+ → 4+) = 90 e2fm4
background subtracted, Doppler corrected for 30Na30Na ((3+) → 2+)
30Na ((4+) → (3+))30Na ((4+) → 2+)
measuring time: 80 hoursbeam intensity: 550 ions/sec
Follow up beam time Oct. 2012
GOSIA Coulex calculationResults:- one step E2 excitation
- decay of (5/2+,3/2+) level via M1 transition
- results confirms strong collective
excitation - rotational sequence: 1/2+ → 3/2+ → 5/2+
B(M1, 5/2+→ 3/2+)=0.1 – 0.5 µn
2
B(E2, 1/2+→5/2+) = 182 e2fm4
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
M. Seidlitz et al; PLB 700 (2011) 181M. Kimura, Phys. Rev. C 75, 041302(R) (2007)
Shape coexistence in 30Mg
W. Schwerdtfeger, et al; PRL 103, 012501 (2009)
Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
electric monopole (E0) transition to ground state: r2(E0)= (26.2 (7.5)) x 10-3
beyond-mean-field calculations with Gogny force:• two competing configurations, small mixing • largely different intrinsic quadrupole deformation • ground state: 1d3/2 neutrons• first excited 0+ state: 1f7/2 neutrons
predictions for 32Mg
Short term perspectivesOutline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
• 2011 campaign- Coulex experiments: 188;..,198Pb, 140Nd, 96Kr, 220Rn, 208Rn, 128Cd, 72Kr, 30Na, 98Sr- transfer experiments- g-factor measurements
Discussion of physics campaign during CERN shut down periodMINIBALL workshopUniversity of Cologne 27.-28. February or March 5.-6. March 2012.
• 2012 campaign
• 2013 CERN shut down