Parameters of reaction cross section calculation for medium nuclei

Cross sections for neutron induced reactions of 58,60Ni, 59Co, and 54,56Fe are calculated employing optical, Hauser-Feshbach, and pre-equilibrium models. Neutron optical model parameters (OMP's) of target nuclei were estimated previously from experimental total cross sections and differential elastic scattering cross sections. These parameters are adopted for the Hauser-Feshbach calculation, and reaction cross sections are compared with ones when some global OMP's and the other published OMP'S are employed. The comparisons of proton OMP's are also performed. The reaction cross sections are calculated with some combinations of neutron and proton OMP, and the level density parameters are adjusted so as to reproduce available experimental data. Some of these combinations show that it is difficult to reproduce the experimental data by means of adjustment of level density parameters only. (author)