Study of the shell evolution effect on the nuclei around the 78Ni core structure

Abstract

The interactions between the core which is anymore inert and the valence nucleons play a very important role in the interpretation of nuclear properties far from stability. The work done in this study is based on the calculations of energy spectra and electromagnetic properties for even-even isotones with N=52, in the 78Ni region. Based on the interaction jj45apn with the space model jj45pn, we have realized some modifications considering the monopole interaction and a new interaction called jj45am is introduced. The calculations are performed in the framework of the nuclear shell model using the NuShellX@MSU code. The shell evolution, studied by estimating the effective single-particle energies (SPEs) in this region, show an important influence on the nuclear structure properties. The obtained results using the new interaction jj45am are in agreement with the experimental data, and better than those given by the original one jj45apn.