Proton-Proton Scattering at 14.5 Mev

Abstract

The scattering of 14.5 Mev protons by protons has been studied by using a coincidence counting method. The 14.5 Mev protons were obtained from the 37-inch synchrocyclotron at Berkeley. The measurements of the differential scattering cross section are absolute and extend from 10° to 45°. The accuracy was not high, about ten percent, because the pulsed nature of the synchrocyclotron beam introduced a large background of accidental counts. At small angles the scattering is significantly larger than that predicted by $S$ wave scattering only. This indicates the effect of $P$ wave scattering such as that due to a repulsive potential well. The results are not inconsistent with those found at 8 and 10 Mev.