From N=2Z in 60Ca to N=Z in 80Zr: Connecting the driplines

11th International Spring Seminar on Nuclear Physics: Shell Model and Nuclear Structure – achievements of the past two decades

Poves, A.^1,2 ; Nowacki, F.^3 ; Sieja, K.^3 ; Zuker, A.P.^3 ; Lenzi, S.M.^4

Departamento de Física Teórica and IFT, UAM-CSIC, Universidad Auónoma de Madrid, Spain^1

Isolde, CERN, Geneve, Switzerland^2

Université de Strasbourg, CNRS, IPHC, 23 rue du Loess, Strasbourg

67037, France^3

Dipartimento di Fisica dell'Universitá, INFN, Sezione di Padova, Padova

I-35131, Italy^4

关键词: Deformed band;    Effective interactions;    Low-energy spectra;    Quadrupoles;    Shape coexistence;    Shell models;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/580/1/012007/pdf
DOI  :  10.1088/1742-6596/580/1/012007

来源: IOP

【 摘 要 】

We present Large Scale Shell Model calculations using the effective interaction LNPS, which reproduce nicely the experimental data available in the N=40 island of deformation. We deal as well with the triple (shape?) coexistence in the low energy spectrum of68Ni, showing that the highly deformed band based upon the excited 0+state at 2627 keV is in fact the doorway to the island. The onset of prolate quadrupole collectivity and shape coexistence in the heavy N=Z nuclei, is explained by means of the realizations of the pseudo plus quasi SU3 symmetry, with special emphasis on the shape mixing in the ground state of72Kr.