Multifragmentation for 36Ar+238U treated as statistical dynamic interaction processes.

Abstract

The exclusive multifragment multiplicities for the system $^{36}\mathrm{Ar}$${+}^{238}$U at 35 MeV/nucleon incident energy are calculated using the Boltzmann master equation for the fast cascade, and the Weisskopf-Ewing evaporation model for successive binary decay of the equilibrated residues. These calculated results are consistent with the experimental results of Kim et al. We show that the multiplicity distribution in such a model has a sensitivity to the equilibrated excitation, so that multiplicity could be an observable characteristic of excitation. This in turn may be used to infer time delay for fragment emission (in a model dependent way).