Simple description of the temperature dependencies of the width of fission-fragment mass yield in 197Au and 209Bi at intermediate energies

TL;DR

This paper presents a simple model describing how the width of fission fragment mass yields in gold and bismuth varies with temperature at intermediate energies, emphasizing the role of surface energy terms.

Contribution

It introduces a straightforward approach incorporating surface energy terms and temperature dependence to accurately describe experimental fission fragment mass yield widths.

Findings

Surface energy terms significantly influence the width of mass yields.

The model successfully fits experimental data across a range of energies.

Temperature dependence is crucial for understanding fission fragment distributions.

Abstract

Simple approach is used to a description of the experimental data for the widths of fission fragment mass yields in 197Au and 209Bi at low and intermediate energies. This approach based on both the expression for the temperature dependence of the width of fission fragment mass yield and the mass of the most probable fragment. The expression for the width of fission fragment mass yield depends on the mass of the most probable fragment, the surface terms of the energy level density parameter, the temperature and the stiffness parameter of the potential related to mass-asymmetric degree of freedom. It is shown that the contribution of the surface term of the energy level density parameter into the width is important for description of the experimental data in wide range of energies.