The Differential Cross Section for the Scattering of 9.48-Mev Protons by Helium

The angular distribution of protons scattered by helium has been measured at 9.48-Mev incident proton energy in the angular range of 10^∘{} to 172.5^∘{} in the laboratory system. Ilford C-2 photographic emulsions were used for detecting the scattered particles. The geometry of the multiplate scattering chamber and the accuracy of the construction was such that the results obtained have a relative accuracy within the counting statistics and an absolute accuracy to ±{}3 percent. The results are given in terms of the differential cross section per unit solid angle in the center-of-mass system and are compared to the results at other energies.