Influence of dynamical parameters on pre-scission particles and fission probability in heavy-ion collisions

Abstract

A stochastic approach to fission dynamics based on one- and three-dimensional Langevin equations was applied to calculate the fission probability and the pre-scission particle multiplicity. Evaporation of pre-scission light particles along Langevin fission trajectories from the ground state of the compound nucleus to its scission and fission probability have been calculated using a Monte Carlo simulation technique. To examine this approach we used $^{19}\mathrm{F}+^{181}\mathrm{Ta}$ and $^{16}\mathrm{O}+^{197}\mathrm{Au}$ systems. Our results show that the fission probability and pre-scission particle multiplicity in three dimensions is different from the one-dimensional Langevin approach. The theoretical results of pre-scission neutron, proton, and $\ensuremath{\alpha}$-particle multiplicities and the fission probability for given systems based on this model are compared with available experimental data. The obtained results using three-dimensional calculations are in better agreement with experimental data.