Photon and proton induced fission on heavy nuclei at intermediate energies

Abstract

Abstract. We present an analysis of fission induced by intermediate energy protons or photons on actinides. The 660 MeV proton induced reactions are on 241 Am, 238 U, and 237 Np targets and the Bremmstrahlung-photons with end-point energies at 50 MeV and 3500 MeV are on 232 Th and 238 U targets. The study was performed by means of the Monte Carlo simulation code CRISP. A multimodal fission extension was added to the code within an approach which accounts for the contribution of symmetric and asymmetric fission. This procedure allowed the investigation of fission cross sections, fissility, number of evaporated nucleons and fission-fragment charge distributions. The comparison with experimental data show a good agreement between calculations and experiments.

Efeitos do movimento coletivo na evaporação e fissão nuclear

“…This code has been developed for more than three decades [5,21,22,23,24,25] and has been used to study very different nuclear reactions with success. A lot of good agreements are obtained between experiment and CRISP results for photon-, proton-and electron-induced fission reactions [26,27,28,29,30,31,32,33,34,35,36]. Also there are some applications of CRISP, especially for nuclear reactions, where we apply the model with success to develop new concepts of nuclear reactors [37,38,39,40,41].…”