Deformation and shape coexistence in neutron-rich nuclei at N~40

International Symposium on Exotic Nuclear Structure From Nucleons 2012

Lenzi, S.M.^1

Dipartimento di Fisica e Astronomia, Università di Padova, INFN, Padova, Italy^1

关键词: Gamma-ray spectroscopy;    Inelastic collision;    Low-excitation energy;    Mass regions;    National laboratory;    Neutron-rich nuclei;    Shape coexistence;    Shell models;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/445/1/012026/pdf
DOI  :  10.1088/1742-6596/445/1/012026

来源: IOP

【 摘 要 】

The A ∼ 60-70 mass region of neutron-rich nuclei with Z ≤ 28 presents several interesting properties when approaching N=40. At this subshell closure a new region of deformation develops. From the experimental side, these nuclei can be populated at relatively high spin by means of multi-nucleon and deep-inelastic collisions. Selected results on the gamma-ray spectroscopy of the neutron-rich nuclei in this mass region are discussed. In particular, the shape coexistence in67Co at low excitation energy, populated by bombarding a238U target with a 460 MeV70Zn beam at the Legnaro National Laboratory is interpreted by means of shell model calculations in a large valence space. These calculations are extended to the description of excited states in Zn isotopes.