Abstract

An $l$-dependent absorption has been introduced in an optical-model analysis of $^{40}\mathrm{Ca}(\ensuremath{\alpha},{\ensuremath{\alpha}}_{0})^{40}\mathrm{Ca}$ 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 ${\ensuremath{\chi}}^{2}$ values reduced to an average value of \ensuremath{\sim}5. Below 10.5 MeV, the fits are not substantially improved over those obtained in a previous analysis

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