Study of nuclei around Z = 28 by large-scale shell model calculations

Abstract

We study Cr and Ni isotopes by using Monte Carlo shell model (MCSM) calculations in a pfg9d5 model space. In the MCSM, a wave function is represented as a linear combination of angular-momentum- and parity-projected deformed Slater determinants(MCSM bases) and we can obtain eigenstates in a large model space such as pfg9d5 space. We study intrinsic shapes of nuclei by using deformations of MCSM bases before projection. We show results of MCSM calculations in Cr and Ni isotopes and a level scheme of 68Ni and discuss the magicity of N = 40 in Cr and Ni isotopes and shape coexistence in 68Ni. © Owned by the authors, published by EDP Sciences, 2014.