ISOLDE Workshop and Users meeting 2012

Session

Medium nuclei II

19 Dec 2012, 15:40

503/1-001 - Council Chamber (CERN)

Conveners

Medium nuclei II

• Yorick Blumenfeld (Institut de Physique Nucléaire-Orsay)

46. Shape transition and coexistence in neutron-deficient rare earth nuclei: Coulomb excitation of 140Sm

Andreas Goergen (University of Oslo)

19/12/2012, 15:40

Submitted

The open-shell nuclei with Z>50 and N<82 are predicted to have the largest ground-state deformation in the entire nuclear chart. The shapes are predicted to be prolate except for a small region of nuclei with Z>60 and N≈78, which are predicted to be oblate. Similar to the situation in Hg and Pb isotopes at neutron mid-shell, prolate and oblate shapes can be expected to lie close in energy for...

1. Shape coexistence and shape evolution in neutron-rich A$\simeq$100 nuclei

Prof. Alexandrina Petrovici (IFIN-HH)

19/12/2012, 16:00

Submitted

The structure of neutron-rich nuclei in the A~100 mass region relevant for the astrophysical r-process manifests drastic changes in some isotopic chains and often sudden variations of particular nuclear properties have been identified. For a realistic description of the evolution in structure with increasing spin, energy, and isospin determined by shape coexistence and mixing...

12. Looking at the shape transition at N=60 by safe Coulex of Sr isotopes

Emmanuel Clement (GANIL)

19/12/2012, 16:20

Submitted

The IS451 experiment aims to investigate the shape transition at N=60 in the n-rich Sr isotopes by safe Coulomb excitation at the Miniball setup using REX. In 2007, we have investigated the N=58 nearly spherical Sr96 using a molecular extraction within an UCx primary target. A second run in 2011 focussed on the highly deformed isotopes 98Sr using at that time in-trap and in-EBIS beta decay to...

41. Beta decay studies of the N=Z and waiting point nucleus 72Kr

Jose Antonio Briz Monago (Consejo Superior de Investigaciones Cientificas (CSIC) (ES))

19/12/2012, 16:40

Submitted

The N=Z nucleus 72Kr is situated in the mass region A≈70-80, where phenomena such as shape coexistence [1,2] and possibly also np pairing effects can show up. From the astrophysical point of view, 72Kr is involved in the rp-process of stellar nucleosynthesis being a waiting point nucleus as 73Rb, next step in the one proton capture, is unbound and there is a competition between the two proton...

76. An examination of the turbulent A = 100 region in light of (recent) experimental results (from ISOLDE)

David Lunney (CSNSM Centre de Spectrometrie Nucle aire et de Spectrometrie de)

19/12/2012, 17:00

It’s not just a coincidence that dramatic changes in nuclear deformation occur over just a few nucleons in the middle of a region defined by proton and neutron shell closures. Some of the most sudden and intense shape transitions on the chart occur in the A = 100 region bounded by the Z = 28 and 50 proton closed shells and the N = 50 and 82 neutron closed shells. These rambunctious nuclides...