Interaction of 3.7-Mev Neutrons with Medium Weight Nuclei

A beam of 3.7-Mev neutrons having an energy spread of 400 kev has been used to measure the differential cross sections of calcium, potassium, germanium, selenium, and strontium. Nonelastic cross sections are obtained by substracting integrated elastic cross sections from the total cross sections. In addition, measurements of the transmission for ten additional elements have been made at this energy as part of a comparison of total cross sections with optical-model predictions for medium weight nuclei.