A new effective interaction for $0\hbarω$ shell model calculations in the sdpf valence space

Abstract

The neutron-rich isotopes with Z≤20, in particular those with neutron numbers around N=28, have been at the focus of a lot experimental and theoretical scrutiny during the last few years. Shell-model calculations using the effective interaction SDPF-NR, were able to predict or to explain most of the properties featured by these nuclei. Prominent among them is the disappearance of the N=28 shell closure for Z≤16. We have incorporated into SDPF-NR some modifications, either on purely theoretical grounds or guided by new experimental information. The proposed interaction SDPF-U offers enhanced reliability with respect to the earlier version.