Neutron Transfer Dynamics and Doorway to Fusion in Time-Dependent Hartree-Fock Theory

TL;DR

This paper investigates neutron transfer processes near the Coulomb barrier in heavy-ion collisions using TDHF theory, revealing that single-particle state barriers differ from collective barriers, leading to significant transfer probabilities below the effective barrier.

Contribution

It provides a detailed analysis of mass exchange dynamics and highlights the importance of single-particle barrier variations in sub-barrier transfer phenomena.

Findings

Substantial neutron transfer occurs below the effective barrier.

Single-particle state barriers differ from collective barriers.

Transfer probabilities are significant at sub-barrier energies.

Abstract

We analyze the details of mass exchange in the vicinity of the Coulomb barrier for heavy-ion collisions involving neutron-rich nuclei using the time-dependent Hartree-Fock (TDHF) theory. We discuss the time-dependence of transfer and show that the potential barriers seen by individual single-particle states can be considerably different than the effective barrier for the two interacting nuclei having a single center-of-mass. For this reason we observe a substantial transfer probability even at energies below the effective barrier.