αspectroscopic factors inCa40

In the ${}_{}{}^{36}{}_{}{}^{}\mathrm{Ar}$(${}_{}{}^6{}_{}{}^{}\mathrm{Li}$,$d$)${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}$ reaction, at a bombarding energy of 17 MeV, angular distributions have been measured for all levels below 7 MeV excitation. Unnatural-parity states are weak. For natural-parity states, the angular distributions are characteristic of direct $\alpha$ stripping, even as far backward as 160° for the strong states. The data have been analyzed with zero-range distorted-wave Born approximation in order to extract relative $\alpha$-particle spectroscopic factors.