Book Description

Angular distributions of Helium-3 nuclei elastically scattered from Carbon-12 were taken at Helium-3 beam energies of 18.6, 20.0, 22.2, and 23.9 MeV and analyzed with six-parameter local optical model potentials having volume and surface absorption terms. It was found not possible to obtain good predictions to the data over the full angular range examined, but sets of optical model parameters which gave good fits to the data below 85 deg. (c.m.) were obtained. These sets had real well depths clustering around mean values of 75, 130, and 210 MeV. No substantial distinction seemed evident in the quality of the fits between the volume and surface absorption analyses, but perhaps more consistent sets of real well depths were obtained for the surface case. The quality of the fits appeared to improve with higher bombarding energy. (Author).