Large-scale fission data generation with BSkG3

TL;DR

This paper introduces a large-scale computational approach using the BSkG3 energy density functional to systematically generate fission data for over 3,000 heavy nuclei, including odd and odd-odd systems, with implications for nucleosynthesis.

Contribution

It presents a comprehensive, efficient method for calculating fission properties across a wide range of heavy nuclei using advanced EDF modeling.

Findings

Generated a dataset of primary fission barriers and half-lives for ~3,300 nuclei.

Included effects of axial, triaxial, and octupole deformations in calculations.

Discussed implications for r-process nucleosynthesis.

Abstract

Modeling fission properties, such as barriers and rates, is highly challenging. The most microscopic methods available are based on energy density functionals (EDFs) and rely on a limited set of collective coordinates to describe the evolution of a fissioning nucleus from its ground state to scission. Leveraging the efficiency of the MOCCa nuclear structure code and the predictive power of the BSkG3 EDF, we systematically study fission properties of the heaviest nuclei (roughly 3,300) accounting for (1) axial, triaxial and octupole moment; (2) all nuclei, including odd and odd-odd systems; and (3) fission paths determined via the least-action principle. We present the set of primary fission barriers and spontaneous fission half-lives we obtain and discuss their implications for r-process nucleosynthesis.