Interplay between tensor force and deformation in even-even nuclei

TL;DR

This paper investigates how the nuclear tensor force influences deformation properties in even-even nuclei, revealing significant modifications to potential energy landscapes and ground state shapes across various isotopic chains.

Contribution

It provides a detailed analysis of the tensor force's impact on nuclear deformation and pairing, using Hartree-Fock-Bogoliubov theory with the D1ST2a Gogny interaction, highlighting new insights into nuclear structure.

Findings

Tensor force significantly alters potential energy surfaces.

Ground state shapes can change due to tensor effects.

Pairing characteristics are affected by the tensor force.

Abstract

In this work we study the effect of the nuclear tensor force on properties related with deformation. We focus on isotopes in the Mg, Si, S, Ar, Sr and Zr chains within the Hartree-Fock-Bogoliubov theory using the D1ST2a Gogny interaction. Contributions to the tensor energy in terms of saturated and unsaturated subshells are analyzed. Like-particle and proton-neutron parts of the tensor term are independently examinated. We found that the tensor term may considerably modify the potential energy landscapes and change the ground state shape. We analyze too how the pairing characteristics of the ground state change when the tensor force is included.