Actinide Nucleon-Induced Fission Reactions up to 150 Mev

Fission/evaporation mechanism for description of nucleon-induced fission of actinide nuclei up to ~150 MeV excitation energy is claimed to be valid. Damping of collective modes contribution to the level density as dependent on deformation is investigated, n- and p- induced first-chance fission cross sections up to 150 MeV are found to be much different. Possible differences of measured p- and n- induced fission cross sections are attributed to the influence of the isovector term of the coupled channel optical potential.