Coupled-channels optical model analyses of nucleon-induced reactions for medium and heavy nuclei in the energy region from 1 keV to 200 MeV

Kunieda, Satoshi  ; Chiba, Satoshi; Shibata, Keiichi; Ichihara, Akira ; Sukhovitskij, E.*

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 systematics was consequently obtained for the optical potential parameters with simple functional forms. It was confirmed that coupld-channels analyses were indispensable to achieve a global description of experimental data. In this study, we have obtained a new global parameter set applicable to a wide range of energy and mass number. It is found that the parameter set obtained is very useful for nuclear data evaluations of fission-product nuclei for which available experimental data are scarce.