Fission yields in nucleon induced reactions at intermediate energies

Results are presented of an activation experiment on proton induced fission of natW, 197Au, natPb, 208Pb and 232Th at 190 MeV. Fission product yields have been measured and an attempt has been made to reconstruct the charge and mass yield curves. This is followed by the description of a new theoretical approach to predict fission fragment mass yields for both actinides and sub-actinides in the incident energy range between 10 and 200 MeV. Temperature dependent fission barriers and precision shapes are determined within a temperature dependent version of the Brosa model. These quantities combined with the original random neck rupture model and the existing nuclear reaction code ALICE-91 provide a new way of calculating fission fragment and product yields. The predictive power of this method is tested against a set of experimental data. (author)