Preequilibrium to evaporation residues: Dynamical approach to intermediate energy nucleus-nucleus collisions.

Abstract

Dynamical evolution of the nucleus-nucleus collisions in the Fermi energy domain is followed from the point of interaction to the evaporation residues on an event-by-event basis by a Monte Carlo simulation technique. The complete reaction process comprises two phases: (i) the preequilibrium phase and (ii) the evaporation phase. The initial preequilibrium phase leads to the formation of an incompletely fused composite that, assumed to be thermally equilibrated, subsequently decays leading to final residues. The calculations are parameter free. The calculated inclusive residue charge distribution, exclusive proton and \ensuremath{\alpha}-particle spectra, and other physical observables for the reaction $^{40}\mathrm{Ar}$${+}^{24}$Mg and $^{40}\mathrm{Ar}$${+}^{13}$C at 1100 MeV are compared with the respective experimental data. The theoretical predictions are found to be in good agreement with the experimental results.