Total Cross Sections of Carbon and Hydrogen for High Energy Neutrons

Abstract

Measurements of the total cross sections of carbon and hydrogen have been made at neutron energies of 97±5, 117±5, 140±5, 156±5, 180±7, and 220±10 Mev, using a calibrated anthracene crystal as an energy sensitive detector for recoil protons. This proportional crystal was used as the fourth of a quadruple coincidence anthracene scintillation counter telescope which detected recoil protons scattered at 20° from a polyethylene radiator in the collimated neutron beam from the University of Rochester 130-in. synchrocyclotron. The methods employed permit the simultaneous measurement of total cross sections over a continuous spectrum of neutron energies. The results are in general agreement with previously reported data.