Abstract
A modification of the time-dependent Hartree-Fock (TDHF) formalism is proposed in order to incorporate two-body dissipation. For this purpose a relaxation time, τ, is defined for a statistical redistribution of nucleon momenta due to the nucleon-nucleon scatterings. This process drives the nuclear system at each point towards isotropic Fermi distributions. The method is illustrated by showing results for the collision of one-dimensional nuclear slabs and comparison with TDHF is made. Microscopic calculations show τ to be of the order of 10 −21 s. For this value of τ and collisions of a few MeV/nucleon the two-body dissipation is comparable with one-body dissipation.
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