Effective interaction for nuclei of A = 50-100 and Gamow-Teller properties

Abstract

A new effective interaction is proposed for shell-model calculations in the model space consisting of single-particle orbits p3/2, f 5/2, p1/2, and g9/2. Starting from a realistic interaction derived from the nucleon-nucleon potential, Hamiltonian parameters are modified by a least-squares fit to experimental energy data. The resultant interaction JUL32 is tested from various viewpoints. The property of Gamow-Teller transition strength is studied in the full pf-shell model space focusing on nuclei around 56Ni, where the shell-model results show significant dependence on the choice of the effective interaction. © 2005 IOP Publishing Ltd.