# Description of the mass-asymmetric fission of the Pt isotopes, obtained in the reaction $^{36}$Ar + $^{142}$Nd within the two-stage fusion-fission model

## TL;DR

This paper applies a two-stage dynamical stochastic model to analyze mass and energy distributions of fission fragments in platinum isotopes produced by the reaction of argon with neodymium, incorporating shell effects and neutron evaporation.

## Contribution

It introduces a detailed two-stage fusion-fission model using Langevin equations to describe the evolution of the system, including orientation and tunneling effects, for platinum isotope fission.

## Key findings

- Calculated distributions agree with experimental data
- Shell effects and neutron evaporation significantly influence results
- Model captures the impact of system rotation on fission characteristics

## Abstract

The two stages dynamical stochastic model developed earlier for description of fusion-fission reactions is applied to the calculation of mass- and energy-distributions of fission fragments of platinum isotopes in reaction ${\rm ^{36}Ar + ^{142}Nd \to ^{178-x}Pt + xn}$. The first stage of this model is the calculation of the approaching of projectile nucleus to the target nucleus. On the second stage of the model, the evolution of the system formed after the touching of the projectile and target nuclei is considered. The evolution of the system on both stages is described by three-dimensional Langevin equations for the shape parameters of the system. The mutual orientation of the colliding ions and tunneling through the Coulomb barrier in the entrance channel are also taken into account. The potential energy of the system is calculated within the macroscopic-microscopic approach. The calculated mass-energy distributions of fission fragments are compared with the available experimental data. The impact of shell effects, rotation of the system and neutron evaporation on the calculated results is discussed.