The scattering of alpha particles and deuterons by iodine-127

Abstract The differential elastic scattering cross sections of 38 MeV α-particles as well as 8 and 19.5 MeV deuterons by I 127 have been determined using nuclear emulsions. The angular distributions obtained have been analyzed according to Porter's model of absorption along classical undistorted Coulomb orbits. Information is thus obtained on the mean free path of the incident particles in nuclear matter. In the course of this experimental work, indications of the existence of a Cohen peak in the inelastic scattering have been observed; the evidence will be described and the implications discussed.