Microscopic Investigation of Fusion and Quasifission Dynamics

TL;DR

This paper applies Time-Dependent Hartree-Fock theory to study fusion and quasifission in heavy-ion reactions, providing insights into superheavy element production and comparing results with experimental data.

Contribution

It introduces TDHF-based calculations for fusion and quasifission dynamics, highlighting the impact of tensor forces and shell effects in these processes.

Findings

Calculated capture and fusion cross sections agree with experiments.

Identified the role of tensor force in quasifission fragment distributions.

Enhanced understanding of shell effects in heavy-ion reactions.

Abstract

We introduce the application of Time-Dependent Hartree-Fock (TDHF) theory to two key aspects of heavy-ion reaction dynamics for producing superheavy elements: fusion and quasi-fission (QF). For fusion reactions $^{48}$Ca+$^{238}$U, the capture cross sections, fusion probabilities, and evaporation-residue cross sections are calculated using the inputs from TDHF simulations, and the results are found to be in reasonable agreement with available experimental data. For the QF process of $^{48}$Ca+$^{249}$Bk, we show the distribution of the fragments and investigate the impact of the tensor force, significantly enhancing the role of spherical shell effects.