Au photofission cross section by quasimonochromatic photons in the intermediate energy region

The photofission cross section of Au was determined in the energy range 100–300 MeV by means of a quasimonochromatic photon beam. The nuclear fissility $P_f$ was calculated using the recently measured total photoabsorption cross sections. The nuclear excitation energy $E^{\mathrm{*}}$, charge and mass of compound nucleus were obtained by means of an intranuclear cascade Monte Carlo calculation. The fissility values determined for Au, Bi, and U were compared with the predictions of the cascade-evaporation model and remarkably fitted by the calculation.