Coupled-channels Optical Model Analyses of Nucleon-induced Reactions for Medium and Heavy Nuclei in the Energy Region from 1 keV to 200 MeV

摘要

Optical model analyses were carried out using the coupled-channels method over various medium and heavy nuclei for incident neutrons and protons in the energy region from 1 keV to 200 MeV. Global sys-tematics were consequently obtained for the optical potential parameters with simple functional forms. It was confirmed that coupled-channels analyses were indispensable to achieving a global description of experimental data for wide ranges of energies and mass numbers (50 approx< A approx< 240). It was also found that the parameter set obtained would be useful for nuclear data evaluations of fission-product nuclei for which available experimental data are scarce.