Optical-Model Information Provided by Scattering from Aligned Targets

Abstract

Data on the scattering of $\alpha$ particles from aligned ${}_{}{}^{165}{}_{}{}^{}\mathrm{Ho}$ was recorded over the energy range $14<~E_{\alpha }<~23$ 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 $\alpha$ scattering from rare-earth nuclei.