Fusion cross section and total kinetic energy of fission fragments by the dynamical dissipative surface-friction model

TL;DR

This paper analyzes fusion cross sections and fission fragment energies in the $^{48}$Ca+$^{238}$U reaction using a multidimensional Langevin model that incorporates surface friction effects, providing insights into dissipation mechanisms.

Contribution

It introduces a dynamical dissipative surface-friction model to analyze fusion and fission processes, determining the tangential friction strength from experimental data.

Findings

Tangential friction increases with the relative velocity of projectile and target.

The model successfully reproduces experimental fusion cross sections.

Surface friction plays a significant role in fission fragment energy distribution.

Abstract

The capture cross section, the fusion cross section, and the quasi-fission yield producing symmetric fragments ($A_{CN}/2\pm20u$) in the $^{48}$Ca+$^{238}$U reaction are analyzed by the multidimensional Langevin equation taking account of the surface friction effect. From the experimental data, the strength of the tangential friction has been determined. It is presented that tangential friction increases in proportional to the power of the relative velocity of the projectile and the target.