Progress on Brussels-Skyrme atomic mass models on a grid: stiff neutron matter equation of state

TL;DR

This paper presents advancements in the Brussels-Skyrme-on-a-Grid atomic mass models, notably BSkG3, which enhances nuclear matter properties and neutron star applications while maintaining accuracy in nuclear mass and radius predictions.

Contribution

Introduction of BSkG3 model with improved nuclear matter properties suitable for neutron star studies, building on previous models.

Findings

BSkG3 improves infinite nuclear matter properties.

BSkG3 maintains excellent agreement with experimental nuclear masses.

Nuclear matter properties are significantly enhanced.

Abstract

We report here the current developments on the Brussels-Skyrme-on-a-Grid (BSkG) atomic mass models. In comparison with our previous models, BSkG3 improves the infinite nuclear matter (INM) properties which opens its applications to neutron stars. The results presented here show that BSkG3 preserve the excellent agreement with experimental nuclear masses and radii, together with fission barriers of actinides obtained by BSkG1 and BSkG2, while the nuclear matter properties are considerably improved.