Re-Investigation of Entrance Channel Effects in Heavy-Ion Fusion-Fission Dynamics

The experimental calculation of pre-scission neutron multiplicity is a highly valuable method for determining the fission timescale. In this study, we have determined the fission time for three consecutive shell-closure compound nuclei, namely 212Rn, 213Fr, and 214Ra (with a neutron number of 126) forming via different entrance channel, as well as three consecutive non shell-closure compound nuclei, namely 214Rn, 215Fr, and 216Ra (with a neutron number of 128). To accomplish this, we have utilized the statistical model code JOANNE2 and incorporated available experimental data from EXFOR. Our observation shows that non-shell closure compound nuclei exhibit more dissipation compared to shell closure compound nuclei, resulting in a longer fission time.