Fluctuation and dissipation dynamics in fusion reactions from stochastic mean-field approach

TL;DR

This paper derives and evaluates transport coefficients for heavy-ion fusion reactions using a stochastic mean-field approach, providing insights into dissipation and fluctuation mechanisms during nuclear collisions.

Contribution

It introduces a method to extract transport coefficients from stochastic mean-field dynamics and validates them with TDHF simulations, advancing understanding of nuclear dissipation.

Findings

Transport coefficients match those from nucleon exchange models

Accurate description of dissipation and fluctuation in heavy-ion collisions

Validation through TDHF simulation results

Abstract

By projecting the stochastic mean-field dynamics on a suitable collective path during the entrance channel of heavy-ion collisions, expressions for transport coefficients associated with relative distance are extracted. These transport coefficients, which have similar forms to those familiar from nucleon exchange model, are evaluated by carrying out TDHF simulations. The calculations provide an accurate description of the magnitude and form factor of transport coefficients associated with one-body dissipation and fluctuation mechanism.