Global nuclear structure aspects of tensor interaction

TL;DR

This paper investigates how strong attractive tensor interactions and reduced spin-orbit strength influence nuclear properties like binding energies, separation energies, and deformability, based on fits to specific nuclear shell splittings.

Contribution

It provides a detailed analysis of the impact of tensor and spin-orbit interactions on nuclear structure, emphasizing the necessity of adjusted coupling constants.

Findings

Reduced isoscalar spin-orbit strength is necessary

Strong attractive tensor coupling constants are required

Significant effects on binding energies and nuclear deformability

Abstract

A direct fit of the isoscalar spin-orbit and both isoscalar and isovector tensor coupling constants to the f5/2-f7/2 SO splittings in 40Ca, 56Ni, and 48Ca requires: (i) a significant reduction of the standard isoscalar spin-orbit strength and (ii) strong attractive tensor coupling constants. The aim of this paper is to address the consequences of these strong attractive tensor and weak spin-orbit fields on total binding energies, two-neutron separation energies and nuclear deformability.