In this study, the nuclear fission process of the excited heavy nucleus , produced in fusion reactions, was investigated within the framework of a modified statistical model using Monte Carlo simulations. Nuclear structure data and gamma energy levels from the NuDat 3.0 database were used to calculate the partial decay widths for various emission channels, including neutrons, protons, alpha particles, gamma rays, and fission. The simulations were performed over a range of excitation energies (30–80 MeV) with one thousand statistical iterations at each level, and the dynamical evolution of the nucleus was followed until fission or cooling.
The results revealed that the probability of fission is very high at medium and high excitation energies, approaching nearly 100%. Nevertheless, neutron and gamma emissions play an essential role in reducing the excitation energy and delaying fission. Comparisons with experimental fission cross sections and survival probabilities after multiple neutron emission demonstrated the ability of the model to reproduce the statistical behavior of heavy nuclei. At higher excitation energies, neutron emission increases significantly, while proton emission remains relatively small but shows an increasing trend, and alpha emission is negligible. Gamma-ray emission, however, acts as the dominant mechanism for energy dissipation at all stages. To achieve consistency with experimental observations, the free parameters of the model (rs and a) were adjusted, leading to improved agreement with both fission cross sections and pre-fission neutron multiplicities. Overall, the findings confirm that fission is the dominant decay path of while gamma emission is the key mechanism for gradual energy reduction prior to fission.