Energy Dependence of Proton-Proton Scattering, 18.8 to 31.8 Mev

Abstract

Measurements have been made of the absolute differential cross section of proton-proton scattering at 90° in the center-of-mass system. The energy of the incident protons was varied from 31.8 Mev down to 18.8 Mev, and an energy interval of ±1.0 percent was selected by means of a deflecting magnet. Apparatus using a proportional counter and a triple coincidence method was used to reduce the background. Measurements were made simultaneously, using apparatus for measuring the angular distribution at 31.8 Mev and a single charge integrator for collecting the incident proton beam.