Optical-Model Information Provided by Scattering from Aligned Targets

Abstract

Data on the scattering of $\ensuremath{\alpha}$ particles from aligned $^{165}\mathrm{Ho}$ was recorded over the energy range $14<~{E}_{\ensuremath{\alpha}}<~23$ MeV. Optical-model calculations are presented. It is shown that the data provide a clear resolution of the optical-model ambiguities found in previous analyses of $\ensuremath{\alpha}$ scattering from rare-earth nuclei.