Fission Fragments Mass Yields of Actinide Nuclei

TL;DR

This paper introduces a new Fourier-based parametrization for modeling fissioning nuclei shapes, enabling detailed calculations of fission fragment yields and energies in actinide nuclei.

Contribution

It develops a rapid convergent Fourier parametrization for nuclear shapes and applies it within a macro-micro model to compute fission fragment distributions.

Findings

Accurate fission fragment mass yields obtained

Effective modeling of nuclear shape dynamics

Insights into charge equilibration and neutron emission

Abstract

A new, rapidly convergent Fourier over spheroid parametrization is developed to describe the shape of a fissioning nucleus: its elongation, non-axiality and left-right asymmetry and neck formation. The 4D Potential Energy Surfaces (PES) of even-even actinide nuclei are evaluated within the macro-micro model. The Langevin trajectories generated on such PESs allow for obtaining the fission fragments' mass and kinetic energy yields. The charge equilibration at the scission configuration and the post-scission neutron emission are also discussed.