Collective degrees of freedom of the neutron-rich A~100 nuclei

by Vladimir Manea (CSNSM Centre de Spectrometrie Nucle aire et de Spectrometrie de)

Thursday 10 Oct 2013, 14:30 → 15:30 Europe/Zurich

26-1-022 (CERN)

The neutron-rich A~100 region of the nuclear chart is revisited with recent ISOLTRAP mass measurements of    ^98-100Rb. Some of the experimental data in the region is reviewed, in connection to the shape transition which takes place at N~60. The rubidium (Z = 37) isotopic chain marks the low-Z border of the region in which this shape transition was so-far observed, the experimental data suggesting a smooth onset of deformation in the neighbouring krypton chain (Z = 36). The influence of intrinsic quadrupole deformation on the two-neutron separation energies and charge radii of the neutron rich A~100 nuclei is studied in the Hartree-Fock-Bogoliubov (HFB) framework, aiming at an explanation of shape evolution towards the krypton isotopic chain. The effect of the pairing interaction on the onset of quadrupole deformation is systematically studied. Additionally, the role of octupole collectivity in defining the trend of two-neutron separation energies before N = 60 is investigated, in connection to recent HFB results from the literature.

 

Slides VM-PGM.pdf