Anl-Dependent Absorption in the Optical-Model Description ofCa40(α,α0)Ca40Scattering

An $l$-dependent absorption has been introduced in an optical-model analysis of ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}(\alpha ,{\alpha }_0){}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}$ energy-averaged angular-distribution data in the bombarding-energy range 5.5-17.5 MeV. Above 10.5 MeV, a marked improvement in the description results with ${\chi }^2$ values reduced to an average value of ∼5. Below 10.5 MeV, the fits are not substantially improved over those obtained in a previous analysis