Effect of tensor force on dissipation dynamics in time-dependent Hartree-Fock theory

TL;DR

This study investigates how tensor forces influence energy dissipation in $^{16}$O+$^{16}$O collisions using three-dimensional time-dependent Hartree-Fock theory with Skyrme functionals, revealing that tensor forces can either enhance or reduce dissipation.

Contribution

It demonstrates the impact of tensor forces on dissipation dynamics in heavy-ion collisions within a fully three-dimensional TDHF framework, highlighting their role in matching experimental fusion cross sections.

Findings

Energy dissipation decreases with increasing initial bombarding energy.

Tensor forces can either increase or decrease energy dissipation depending on parameters.

Including tensor forces improves agreement with experimental fusion cross sections.

Abstract

The role of tensor force on the collision dynamics of $^{16}$O+$^{16}$O is investigated in the framework of a fully three-dimensional time-dependent Hartree-Fock theory. The calculations are performed with modern Skyrme energy functional plus tensor terms. Particular attention is given on the analysis of dissipation dynamics in heavy-ion collisions. The energy dissipation is found to decrease as an initial bombarding energy increases in deep-inelastic collisions for all the Skyrme parameter sets studied here because of the competition between the collective motion and the single-particle degrees of freedom. We reveal that the tensor forces may either enhance or reduce the energy dissipation depending on the different parameter sets. The fusion cross section without tensor force overestimates the experimental value by about 25\%, while the calculation with tensor force T11 has good agreement with experimental cross section.