1. MINIBALL g-ray Spectroscopy far from Stability
Overview Physics Case
REX-ISOLDE
‚Island of Inversion‘ Results
Perspectives with HIE-ISOLDE
Peter Reiter
IKP, University of Cologne
for the MINIBALL collaboration
Nuclear Structure and Dynamics Opatija, Croatia, July 9. – 13., 2012

2. Shell Model Physics with MINIBALL@REX-ISOLDE
Outline - Physics case Island of Inversion - Perspectives
Shell Model Physics with
“Island of inversion” N=20
Coulomb excitation &
transfer reactions
(Darmstadt, Cologne, Munich)
28,29,30Na
29,30,31,32Mg
Phys. Lett. B, 700 ( 2011) 181
Phys. Rev. Lett. 105, (2010)
Phys. Rev. Lett. 103, (2009)
Phys. Rev. Lett. 94, (2005)
Towards the doubly magic 78Ni
with Coulomb excitation and nucleon
transfer reactions around 68Ni
(CERN, Leuven, Munich)
66,67,68Ni
67,68,69,70,71,73Cu
72,74,76,78,79,80Zn
Phys. Rev. C 84, (2011)
Phys. Rev. C 82, (2010)
Phys. Rev. C. 79, (2009)
Phys. Rev. Lett. 100, (2008)
Phys. Rev. C. 78, (2008)
Phys. Rev. Lett. 99, (2007)
Phys. Rev. Lett. 98, (2007)
transfer reactions at N=28
(Darmstadt, Munich)
46Ar

3. Shell Model Physics with MINIBALL@REX-ISOLDE
Outline - Physics case Island of Inversion - Perspectives
Shell Model Physics with
Towards the doubly magic 100Sn
(Lund, CERN)
106,107,108,109,110Sn
107,108In
100,102,104Cd
Eur. Phys. J. A 44 (2010) 355
Phys. Rev. C 80,  (2009)
Phys. Rev. Lett. 101, (2008)
Phys. Rev. Lett. 98, (2007)
g-factors in Te isotopes
(Darmstadt, Madrid)
132,134,136Te
B(E2) measurements around 132Sn
(Darmstadt, Munich)
122,124,128Cd
138,140,142,144Xe
140,142,148Ba

4. Shapes & collectivity with MINIBALL@REX-ISOLDE
Outline - Physics case Island of Inversion - Perspectives
Shapes & collectivity with
Shapes and collectivity
in the rare earth region
(Darmstadt, Saclay, Oslo)
138,140Nd
140,142Sm
142Gd
144Dy
Collectivity near Z=50
(York, Darmstadt)
116,118Te
Shapes and collectivity between Kr and Sr
(York, Cologne, Munich, Orsay,
Grenoble, Saclay)
72Kr
88,92,94,96Kr
93,95,97,99Rb
96Sr
Phys.Rev.Lett. 108, (2012)
Phys.Rev.Lett. 98, (2007) 4

5. Shapes & collectivity with MINIBALL@REX-ISOLDE
Outline - Physics case Island of Inversion - Perspectives
Shapes & collectivity with
Shapes and collectivity
in light Po, Rn nuclei
(York, Jyväskylä)
206Po
202,204Rn
Octupole collectivity
in heavy Rn, Ra isotopes
(Liverpool)
220,222Rn
222,224Ra
Shapes in Hg, Pb, Po nuclei
(Liverpool, Leuven, Jyväskylä)
182,184,186,188Hg
188,190,192,194,196,198Pb
198,200,202Po 5

6. Coulomb excitation setup
Outline - Physics case Island of Inversion - Perspectives
The MINIBALL
Coulomb 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) 6

7. RIB production at ISOLDE
Outline - Physics case 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

8. Isomeric beams @ ISOLDE
Outline - Physics case Island of Inversion - Perspectives
Isomeric ISOLDE
technique based on in-source laser spectroscopy
(U. Köster et al., NIM B160, 528 (2000), L. Weissman et al., PRC 65, (2000))
set the laser frequency to select and maximize the production
of the isomer of interest 6-
1+ (g.s.)
68Cu
6- (g.s.) 1+
70Cu 3-
722 
242
101
g-Spectroscopy with Cu isomer beams: I. Stefanescu et al. PRL 98, (2007), E. Rapisarda et al. PRC 84, (2011) 8

9. Coulomb excitation of isomeric states of 70Cu
Outline - Physics case Island of Inversion - Perspectives
Coulomb excitation of isomeric states of 70Cu
Systematics of
6- 4- transition
SMI Calculations by N. Smirnova
SMII Calculations by K. Sieja
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
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;
2d5/2
1g9/2
2p1/2
2p3/2
1f5/2
Neutrons excitations across N=50
1g9/2
2p1/2
2p3/2
1f5/2
NO proton-core excitations
NO neutron-core excitations
Proton excitations across Z=28
1f7/2
Z=28
N=28
N=28
Z=20 9

10. RIB preparation @ REX-ISOLDE
Outline - Physics case 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
RIB 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 10

11. 224Ra (+120Sn) Coulomb excitation
Outline - Physics case Island of Inversion - Perspectives
224Ra (+120Sn) Coulomb excitation
- Heaviest REX-ISOLDE
beam
- B(E3, 0+ ↦ 3-)
P.A. Butler1, L.P. Gaffney1, M. Scheck1,2, F. Wenander3, for the IS475 collaboration
1University of Liverpool, UK , 2Technical University Darmstadt, Germany, 3CERN-ISOLDE 11

12. 30,31,32Mg, 30Na 2+ 2+ E2 E2 0+ 0+ 32Mg… 38Mg 30Mg 0p0h, spherical
Outline - Physics case Island of Inversion - Perspectives
30,31,32Mg, 30Na
0p0h, spherical
2p2h (intruder), deformed 2+
p3/2
p3/2
f7/2
f7/2 2+ E2 20
d3/2 E2
d3/2
s1/2
s1/2 0+
d5/2
d5/2 0+  
30Mg
32Mg… 38Mg
E.K. Warburton, J. A. Becker and B. A. Brown, PRC 41 (1990) 1147.
T. Motobayashi, et al.; PLB 346 (1995) P Doornenbal et al

13. ??? inversion normal sd configurations 0+ 0+ 2+ 2+ E2 E0 E2 intruder
Outline - Physics case Island of Inversion - Perspectives
inversion
normal sd
configurations 0+
??? 0+ 2+ 2+ E2 E0 E2
intruder fp
configurations 0+ 0+
30Mg
31Mg
32Mg
nd3/2 +
nf7/2 -
Where are the borders?
How does transition into island of inversion occur ?
Does picture of shape coexistence hold?

14. Coulomb excitation of 30,32Mg
Outline - Physics case Island of Inversion - Perspectives
Coulomb excitation of 30,32Mg
Neutron number
‚Safe‘ energy Coulomb excitation at 2.25 MeV/u
MINIBALL measures with small uncertainty
B(E2) values from first excited 2+ states
to ground state in 30,32Mg
H. Scheit et al; in prep.
M. Seidlitz et al; Phys. Lett. B 700 (2011) 181
O. Niedermeier et al. Phys. Rev. Lett. 94, (2005)

15. g-factor and spin of the 31,33Mg ground state
Outline - Physics case Island of Inversion - Perspectives
g-factor and spin of the 31,33Mg ground state
laser spectroscopy and b-NMR
g-factor and spin for 31Mg and 33Mg
from sign of g-factor  parity
31Mg, Ip = 1/2+ n(sd)-3 (fp)2
33Mg, Ip = 3/2- n(sd)-2(fp)3
pure 2p-2h intruder ground states ! Al 28 29 30 31 32 33 34 35 36 Mg 27 20
nd3/2 +
nf7/2 -
Intruder ground state configurations: 20
31Mg (N=19)
d3/2
33Mg (N=21)
f7/2
Normal ground state configurations:
Ip=3/2+
Ip=7/2- 20
31Mg (N=19)
d3/2
Ip=1/2+ 20
33Mg (N=21)
Ip=3/2- pf sd
Renewed b-decay studies
G. Neyens et al., PRL 94, (2005)
D. Yordanov et al., PRL 99, (2007)
31Mg F. Maréchal et al., PRC 72, (2005)
33Mg V. Tripathi et al., PRL 101, (2008)

16. Outline - Physics case - MINIBALL@REX-ISOLDE - Island of Inversion - Perspectives
Coulomb excitation 31Mg

17. 31Mg Results M. Seidlitz et al; PLB 700 (2011) 181
Outline - Physics case Island of Inversion - Perspectives
31Mg Results
M. Seidlitz et al; PLB 700 (2011) 181
G. Neyens, Phys. Rev. C 84, (2011)
M. Kimura, Phys. Rev. C 75, (R) (2007)

18. Coulomb excitation of 30Na, higher lying states?
Outline - Physics case Island of Inversion - Perspectives
Coulomb excitation of 30Na, higher lying states?
background subtracted, Doppler corrected for 30Na
30Na ((3+) → 2+)
30Na ((4+) → (3+))
30Na ((4+) → 2+)
beam time:
80 hours
beam intensity:
550 ions/sec
more beam time Oct. 2012
B(E2, 2+ → (4+)) = 108 (33) e2fm4 (preliminary!)
theoretical predictions: B(E2, 2+ → 4+) = 90 e2fm4

19. ??? inversion normal sd configurations 0+ 0+ 2+ 2+ E2 E0 E2 intruder
Outline - Physics case Island of Inversion - Perspectives
inversion
normal sd
configurations 0+
??? 0+ 2+ 2+ E2 E0 E2
intruder fp
configurations 0+ 0+
30Mg
31Mg
32Mg
nd3/2 +
nf7/2 -
Does picture of shape coexistence hold?

20. 0+ 0+ 0+ 0+ 30Mg 32Mg Shape coexistence in 30Mg 2 2 1 1
Outline - Physics case Island of Inversion - Perspectives
Shape coexistence in 30Mg 0+ 2 0+ 2 0+ 0+ 1 1
30Mg Mg
- electron spectroscopy after b-decay at ISOLDE
- first excited 0+ state at 1789 keV in 30Mg
W. Schwerdtfeger, et al; PRL 103, (2009)

21. The MINIBALL T-REX setup
Outline - Physics case Island of Inversion - Perspectives
The MINIBALL T-REX setup
T-REX: Si detector array for Transfer experiments at REX-ISOLDE
large solid angle (58% of 4π)
position sensitive
PID (ΔE-E): p, d, t, α,
… and e- from β-decay (!)
Technical details:
Barrel: 140 mm ΔE / 16 resistive strips
1000 mm E / pad
Backward CD: 500 mm ΔE / DSSSD
500 mm E / pad
RIB
V. Bildstein, K. Wimmer,
Th. Kröll, R. Gernhäuser et al.
(funded by TU München,
KU Leuven, U Edinburgh, CSNSM Orsay, TU Darmstadt) 21

22. t(30Mg, 32Mg)p – two-neutron transfer
Outline - Physics case Island of Inversion - Perspectives
t(30Mg, 32Mg)p – two-neutron transfer
3H loaded Ti foil (40 mg/cm2 3H, 10 GBq)
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
K. Wimmer et al; PRL 105, (2010)

23. 0+ 2+ 0+ 2+ E2 E0 E2 0+ 0+ 32Mg 30Mg intruder fp configurations normal
Outline - Physics case Island of Inversion - Perspectives 0+ 2+ 0+ 2+ E2 E0 E2 0+ 0+
30Mg
32Mg
intruder fp
configurations
normal sd
configurations
K. Heyde, J.L. Wood, REV. OF MOD. PHYS., Vol 83, (2011) 1467
S. Grévy et al,; ARIS2011 proceedings

24. preliminary d(66Ni,67Ni)p – the 68Ni region (N=40)
Outline - Physics case Island of Inversion - Perspectives
d(66Ni,67Ni)p – the 68Ni region (N=40)
preliminary
J. Diriken, P. van Duppen, R. Raabe, et al.; IKS-KU Leuven for the IS469 collaboration

25. preliminary d(66Ni,67Ni)p – the 68Ni region (N=40)
Outline - Physics case Island of Inversion - Perspectives
d(66Ni,67Ni)p – the 68Ni region (N=40)
preliminary
proton gated g-spectrum
g-transitions up to 5800 keV
p-g-g- coincidence analysis
J. Diriken, P. van Duppen, R. Raabe, et al.; IKS-KU Leuven for the IS469 collaboration

26. preliminary d(66Ni,67Ni)p – the 68Ni region (N=40)
Outline - Physics case Island of Inversion - Perspectives
d(66Ni,67Ni)p – the 68Ni region (N=40)
shell closure at N=40?
preliminary
Ex [keV]
Ex=3600(250) keV
NNDC
Eg=3619(30) keV
Eg [keV]
High resolution of MINIBALL allows to resolve
states and to analyse angular distribution
J. Diriken, P. van Duppen, R. Raabe, et al.; IKS-KU Leuven for the IS469 collaboration

27. 2014 HIE-ISOLDE intensity upgrade energy upgrade 2016 1.2 MeV/u 3
Outline - Physics case Island of Inversion - Perspectives
HIE-ISOLDE
intensity upgrade
energy upgrade
2014
1.2 MeV/u 3
MeV/u
5.5 MeV/u
10 MeV/u
8 MeV/u
2016

28. Transfer reactions at HIE-ISOLDE
Outline - Physics case Island of Inversion - Perspectives
Transfer reactions at HIE-ISOLDE
Higher energies at HIE-ISOLDE will be favorable for transfer reaction studies
with heavy beams!
Show case example: d(132Sn,133Sn)p
Several HIE-ISOLDE LoIs based on
MINIBALL & T-REX:
- shell evolution
- shape coexistence
- pairing correlations ó pair transfer
- nuclear astrophysics:
(d,p) ó (n,g) capture reactions
Upgrade of T-REX -> flexible
geometry of Si detectors
Fusion veto detector
Spectrometer to identify
heavy transfer products
FRESCO calc‘s by K. Wimmer (NSCL, MSU)

29. Summary MINIBALL spectrometer very well suited for REX-ISOLDE
Outline - Physics case Island of Inversion - Perspectives
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 l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l

30. HIE-ISOLDE MINIBALL + T-REX New instrumentation:
Outline - Physics case Island of Inversion - Perspectives
HIE-ISOLDE
MINIBALL + T-REX
New instrumentation:
MAYA/ACTAR active target
SPEDE - SPectrometer for Electron DEtection in radioactive beam
HELIOS superconducting magnet for charged particle detection
PARIS (Photon Array for studies with Radioactive Ion and Stable beams)
GASPARD (GAmma Spectroscopy and PArticle Detection)
Neutron detectors
TSR storage ring
Magnetic spectrometer or separator for channel selection
Mark Huyse, IKS K.U. Leuven ISOLDE workshop 2010

31. First and recent results from ISOLDE
Outline - Physics case Island of Inversion - Perspectives
‚Island of Inversion‘
First and recent results from ISOLDE
masses show considerable deviations
for nuclei around Z=11, N=20.
 additional binding energy
C. Thibault, et al.; PRC 12 (1975) 644
Charge radii differences from isotope shift measurement
D.T. Yordanov, et al.; PRL 108 (2012) 31

32. RIB preparation @ REX-ISOLDE
Outline - Physics case Island of Inversion - Perspectives
RIB 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 selection
Possibility of in-trap decay during charge breeding:
61Mn → 61Fe
J. Van de Walle et al., CERN-INTC (2009)

33. 6-fold segmented, encapsulated MINIBALL detector
Outline - Physics case Island of Inversion - Perspectives
6-fold segmented, encapsulated MINIBALL detector
Collaboration: Köln, Heidelberg, München, Leuven 33

34. Digital high resolution spectroscopy electronics
Outline - Physics case Island of Inversion - Perspectives
Preamplifier
IKP Köln
MPI-K Hd
Digital high resolution spectroscopy electronics
40 MHz digitizer: DGF 4C Company XIA
Triple cluster detector
3 x core + 3 x 6 segments
IKP Köln and CTT 34

35. (line width after Doppler correction) Abs. Eff. 8 %, ΔΘ = 3.30
Outline - Physics case Island of Inversion - Perspectives
Pulse shape analysis and position sensitivity
in-beam data:
(line width after Doppler correction) Abs. Eff. 8 %, ΔΘ = 3.30 35

36. Deviations from classical shell model
Outline - Physics case Island of Inversion - Perspectives
Deviations from classical shell model

37. Transfer to ground state in 32Mg
Outline - Physics case Island of Inversion - Perspectives
g.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
Transfer to excited 0+ state in 32Mg
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 np3/2 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
K. Wimmer et al; PRL 105, (2010)

38. Shape coexistence in 30Mg
Outline - Physics case Island of Inversion - Perspectives
Shape coexistence in 30Mg
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
W. Schwerdtfeger, et al; PRL 103, (2009)

39. Beam quality, monitoring, quantitative composition
Outline - Physics case Island of Inversion - Perspectives
Beam quality, monitoring, quantitative composition
Measured with ionization chamber (ΔE-Erest)
at the MINIBALL beam dump position
Laser ON
Laser OFF

40. Short term perspectives
Outline - Physics case Island of Inversion - Perspectives
Short term 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 period
MINIBALL workshop
University of Cologne
February or March March 2012.
2012 campaign
2013 CERN shut down

41. t(44Ar,46Ar)p – probing N=28 Weakening of N=28 closure below 48Ca?
Outline - Physics case Island of Inversion - Perspectives
t(44Ar,46Ar)p – probing N=28
Weakening of N=28 closure below 48Ca?
è onset of deformation / shape coexistence?
Search for the second 0+ state
Identified protons
g-rays in coincidence with protons
Transfer to gs of 46Ar
Analysis by K. Nowak, TU München)
Spokesperson: K. Wimmer

42. Coulomb excitation of 30,32Mg
Outline - Physics case Island of Inversion - Perspectives
Coulomb excitation of 30,32Mg
Neutron number
‚Safe‘ energy Coulomb excitation at 2.25 MeV/u
MINIBALL measures with small uncertainty
B(E2) values from first excited 2+ states
to ground state in 30,32Mg
O. Niedermeier, et al., Phys. Rev. Lett. 94, (2005)

43. 30,31,32Mg, 30Na 2+ 2+ E2 E2 0+ 0+ 32Mg 30Mg 0p0h, spherical
Outline - Physics case Island of Inversion - Perspectives
30,31,32Mg, 30Na
0p0h, spherical
2p2h (intruder) 2+
p3/2
p3/2
f7/2
f7/2 2+ E2 20
d3/2 E2
d3/2
s1/2
s1/2 0+
d5/2
d5/2 0+
886
660
660  
30Mg
32Mg
792
722
E.K. Warburton, J. A. Becker and B. A. Brown, PRC 41 (1990) 1147.
T. Motobayashi, et al.; PLB 346 (1995) 9

44. collective properties of 31Mg
Outline - Physics case Island of Inversion - Perspectives
collective properties of 31Mg
- b-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)
F. Maréchal et al., Phys. Rev. C 72, (2005)
M. Kimura, Phys. Rev. C 75, (R) (2007)

45. GOSIA Coulex calculation
Outline - Physics case Island of Inversion - Perspectives
GOSIA Coulex calculation
Results:
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(E2, 1/2+→5/2+) = 182 e2fm4
B(M1, 5/2+→ 3/2+)=0.1 – 0.5 µn2
M. Seidlitz et al; PLB 700 (2011) 181
M. Kimura, Phys. Rev. C 75, (R) (2007)

46. ? ? The „Island of Inversion“ Collective properties of the Na-Isotopes
Outline - Physics case Island of Inversion - Perspectives
The „Island of Inversion“
Collective properties of the Na-Isotopes
(5/2+) ?
(3+) ?
Phys. Rev. C70, , 2004
Y. Utsuno, et al.,
B(E2, 3/2+ → (5/2+)) = 140 (25) e2fm4
(Hurst et al., Phys. Lett. B 674, , 2009)
B(E2, 2+ → (3+)) = 147 (21) e2fm4
(Ettenauer et al., Phys. Rev. C 78, , 2008)
theoretical predictions:
B(E2, 3/2+ → 5/2+) = e2fm4
B(E2, 3/2+ → 7/2+) = 57 e2fm4
theoretical predictions:
B(E2, 2+ → 3+) = 168 e2fm4
B(E2, 2+ → 4+) = 90 e2fm4

47. Coulomb excitation of 30Na, higher lying states?
Outline - Physics case Island of Inversion - Perspectives
Coulomb excitation of 30Na, higher lying states?
background subtracted, Doppler corrected for 30Na
30Na ((3+) → 2+)
30Na ((4+) → (3+))
30Na ((4+) → 2+)
measuring time:
80 hours
beam intensity:
550 ions/sec
Follow up beam time Oct. 2012
B(E2, 2+ → (4+)) = 108 (33) e2fm4 (preliminary!)
theoretical predictions: B(E2, 2+ → 4+) = 90 e2fm4

48. GOSIA Coulex calculation
Outline - Physics case Island of Inversion - Perspectives
GOSIA Coulex calculation
Results:
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(E2, 1/2+→5/2+) = 182 e2fm4
B(M1, 5/2+→ 3/2+)=0.1 – 0.5 µn2
M. Seidlitz et al; PLB 700 (2011) 181
M. Kimura, Phys. Rev. C 75, (R) (2007)

49. Shape coexistence in 30Mg
Outline - Physics case Island of Inversion - Perspectives
Shape coexistence in 30Mg
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
W. Schwerdtfeger, et al; PRL 103, (2009)

50. Short term perspectives
Outline - Physics case Island of Inversion - Perspectives
Short term 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 period
MINIBALL workshop
University of Cologne
February or March March 2012.
2012 campaign
2013 CERN shut down