Accurate spontaneous fission half-lives from a microscopic large-scale nuclear structure model

TL;DR

This paper presents a microscopic nuclear structure model, BSkG3, capable of accurately predicting spontaneous fission half-lives, which are vital for astrophysical r-process modeling, by incorporating advanced degrees of freedom and collective inertias.

Contribution

The BSkG3 model introduces a comprehensive approach combining triaxial and octupole degrees of freedom with microscopic inertias to improve large-scale fission property predictions.

Findings

BSkG3 accurately predicts spontaneous fission half-lives.

Model shows strong agreement with experimental data.

Enhanced predictive power for astrophysical applications.

Abstract

We demonstrate the ability of the BSkG3 model to predict large-scale fission properties. In particular, we focus on the description of spontaneous fission half-lives, which are crucial for modeling the r-process. To assess the model accuracy, we compare predicted and experimental values for all nuclei with available data. The combination of BSkG3 predictive power for ground state and fission properties, the inclusion of triaxial and octupole degrees of freedom, the use of microscopic collective inertias, and the minimization of the action make our approach sophisticated yet practical when it comes to large-scale astrophysical applications.