Optical Model Parameters for Neutron Cross Sections for Medium Mass Nuclei in the 4- to 20-MeV Energy Range and Iron in the 4- to 100-MeV Energy Range

Optical model parameters are recommended for the analysis of neutron cross sections in the atomic number range 24 to 73 and 4- to 20-MeV energy range. Using the real well potential V and real well radius coefficient R in the combination VR², unique energy-independent fitting parameters are obtained regardless of the initial estimates. Neutron data for iron up to 100 MeV are analyzed using uniquely determined energy-dependent parameters.