Effects of prefission neutron emission on the fission fragment angular distributions in heavy-ion-induced fission

Abstract

Earlier calculations of fission fragment anisotropies made with the use of the standard saddle point statistical model have been corrected to include the effects of prefission neutron emission. These calculations are compared with the data reported earlier for the fissioning systems formed by projectile-target combinations of ¹⁰B, ¹²C, ¹⁶O, and ¹⁹F on ²³²Th and ²³⁷Np and ⁹Be on ²³²Th. It is seen that for these systems the conclusions reached earlier regarding the entrance channel dependence of the fission fragment anisotropy as a function of mass (charge) asymmetry are not affected by the inclusion of corrections due to prefission neutron emission.