Mass distributions for induced fission of different Hg isotopes

TL;DR

This paper uses an improved scission-point model to predict how mass distributions in Hg isotope fission change from asymmetric to symmetric as isotope mass increases, aligning well with experimental data.

Contribution

It introduces an enhanced model to accurately predict fission fragment mass distributions across Hg isotopes, highlighting a shape transition from asymmetric to symmetric distributions.

Findings

Mass distribution shifts from asymmetric to symmetric with increasing isotope mass.

Model predictions agree well with experimental data for 180Hg.

Reactions are proposed to experimentally verify the predicted shape transition.

Abstract

With the improved scission-point model the mass distributions are calculated for induced fission of different Hg isotopes with the masses 180-196. The drastic change in the shape of the mass distribution from asymmetric to symmetric is revealed with increasing mass number of the fissioning Hg isotope, and the reactions are proposed to verify this prediction experimentally. The asymmetric mass distribution of fission fragments observed in the recent experiment on the fission of 180Hg is explained. The calculated mass distribution and mean total kinetic energy of fission fragments are in a good agreement with the available experimental data.