Role of Three-Nucleon Forces in Neutron-Rich Nuclei Beyond 132Sn

TL;DR

This paper investigates the influence of three-nucleon forces on the structure of neutron-rich nuclei beyond 132Sn, using shell-model calculations with realistic potentials to understand their relative importance.

Contribution

It provides a comparative analysis of effective two- and three-nucleon forces in neutron-rich nuclei without explicitly including 3NF, advancing understanding of nuclear interactions beyond 132Sn.

Findings

Three-nucleon forces significantly affect nuclear structure properties.

Shell-model results show evolution of spectroscopic features in N=82 isotopes.

Effective 3NF contributions can be inferred indirectly from on-shell-equivalent potentials.

Abstract

The role of three-nucleon forces (3NF) in the description of nuclear structure properties is nowadays a main topic in the field of microscopic many-nucleon calculations. We investigate the relative weight between effective two- and three-nucleon forces in neutron-rich nuclei beyond the doubly-closed 132Sn core within the realistic shell-model framework, studying the evolution of the spectroscopic properties of N=82 isotopes and heavy tin isotopes. This problem is tackled indirectly without explicitly taking into account effective 3NF through the comparison of the results of shell-model calculations obtained from realistic on-shell-equivalent low-momentum potentials.