Monte Carlo simulation for fragment mass and kinetic energy distributions from the neutron-induced fission of $^{235}U$

Abstract

The mass and kinetic energy distribution of nuclear fragments from the thermal neutron-induced fission of $^{235}U$ have been studied using a Monte Carlo simulation. Besides reproducing the pronounced broadening on the standard deviation of the final fragment kinetic energy distribution ($\sigma_{e}(m)$) around the mass number $m$ = 109, our simulation also produces a second broadening around $m$ = 125 that is in agreement with the experimental data obtained by Belhafaf et al. These results are a consequence of the characteristics of the neutron emission, the variation in the primary fragment mean kinetic energy, and the yield as a function of the mass.