Extraction of nucleus-nucleus potential and energy dissipation from dynamical mean-field theory

TL;DR

This paper uses microscopic time-dependent Hartree-Fock theory to extract nucleus-nucleus potentials and analyze energy dissipation in heavy-ion fusion, revealing energy dependence and improved agreement with experimental barriers.

Contribution

It introduces a method to derive energy-dependent potentials and dissipation effects from microscopic mean-field theory, enhancing understanding of fusion dynamics.

Findings

Potentials match frozen density approximation at high energies.

Energy dependence of potentials increases near the Coulomb barrier.

Including dynamical effects aligns theoretical barriers with experimental data.

Abstract

Nucleus-nucleus interaction potentials in heavy-ion fusion reactions are extracted from the microscopic time-dependent Hartree-Fock theory. When the center-of-mass energy is much higher than the Coulomb barrier energy, extracted potentials identify with the frozen density approximation. As the center-of-mass energy decreases to the Coulomb barrier energy, potentials become energy dependent. This dependence indicates dynamical reorganization of internal degrees of freedom and leads to a reduction of the "apparent" barrier. Including this effect leads to the Coulomb barrier energy very close to experimental one. Aspects of one-body energy dissipation extracted from the mean-field theory are discussed.