  In this work we present an analysis of the yields of fission fragments
induced by bremsstrahlung photons with endpoint energies of 50 and 3500 MeV on
232Th and 238U targets using the simulation code CRISP. A multimodal fission
option was added to this code and an extension of the calculation to the
properties of the fission products is presented. By dividing the fissioning
nuclei according to their fissionability, an approach is introduced which
accounts for the contribution of symmetric and asymmetric fission. By adopting
this procedure, it was possible to calculate the main parameters for the
fission fragment charge distribution such as the most probable charge for a
given fission product mass chain and its corresponding width parameter. Also,
it was possible to reproduce features of fragment mass distribution and
evaluate the fissility of fissioning nuclei for photon-induced fission of 232Th
and 238U.
