Novel features of nuclear forces and shell evolution in exotic nuclei

TL;DR

This paper introduces a universal monopole-based interaction model that explains shell evolution in exotic nuclei, highlighting the roles of central and tensor forces, validated through low-momentum interaction methods.

Contribution

It presents a new monopole-based universal interaction and clarifies the effects of central and tensor forces on shell evolution in exotic nuclei.

Findings

Shell structures change with neutron and proton numbers consistent with experiments.

The validity of the tensor force is confirmed using low-momentum interaction V_{low k}.

Key cases of shell evolution are explained through central and tensor force effects.

Abstract

Novel simple properties of the monopole component of the effective nucleon-nucleon interaction are presented, leading to the so-called monopole-based universal interaction. Shell structures are shown to change as functions of $N$ and $Z$ consistently with experiments. Some key cases of this shell evolution are discussed, clarifying the effects of central and tensor forces. The validity of the present tensor force is examined in terms of the low-momentum interaction V$_{low k}$ and the Q$_{box}$ formalism.