One-body energy dissipation in fusion reaction from mean-field theory

TL;DR

This paper uses mean-field theory to analyze energy dissipation in heavy-ion fusion reactions, revealing a universal friction behavior and significant dynamical effects near the Coulomb barrier.

Contribution

It introduces a microscopic method to extract the friction coefficient in fusion reactions, highlighting its universal behavior and dynamical effects.

Findings

Friction coefficient shows universal behavior across systems.

Dynamical effects significantly influence friction near the Coulomb barrier.

Microscopic approach aligns with linear response theory calculations.

Abstract

Information on dissipation in the entrance channel of heavy-ion collisions is extracted by macroscopic reduction procedure of Time-Dependent Hartree-Fock theory. The method gives access to a fully microscopic description of the friction coefficient associated with transfer of energy from the relative motion towards intrinsic degrees of freedom. The reduced friction coefficient exhibits a universal behavior, i.e. almost independent of systems investigated, whose order of magnitude is comparable with the calculations based on linear response theory. Similarly to nucleus-nucleus potential, especially close to the Coulomb barrier, there are sizable dynamical effects on the magnitude and form factor of friction coefficient.