Fission fragment mass yield deduced from density distribution in the pre-scission configuration

TL;DR

This paper presents a microscopic method to deduce fission fragment mass yields from pre-scission nuclear density distributions, applying it to various nuclei and comparing results with experimental data.

Contribution

It introduces a novel approach combining the random neck rupture mechanism with self-consistent density calculations to predict fission fragment mass distributions.

Findings

Method successfully reproduces experimental mass yields.

Application to multiple nuclei demonstrates model's versatility.

Provides insights into the fission process at the microscopic level.

Abstract

Static self-consistent methods usually allow to determine the most probable fission fragments mass asymmetry. We have applied random neck rupture mechanism to the nuclei in the configuration at the end of fission paths. Fission fragment mass distributions have been deduced from the pre-scission nuclear density distribution obtained from the self-consistent calculations. Potential energy surfaces as well as nuclear shapes have been calculated in the fully microscopic theory, namely the constrained Hartree-Fock-Bogolubov model with the effective Gogny D1S density-dependent interaction. The method has been applied for analysis of fission of Fm-256,258, Cf-252 and Hg-180 and compared with the experimental data.