The ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$(${}_{}{}^6{}_{}{}^{}\mathrm{Li}$,$d$)${}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}$ and ${}_{}{}^{28}{}_{}{}^{}\mathrm{Si}$(${}_{}{}^6{}_{}{}^{}\mathrm{Li}$,$d$)${}_{}{}^{32}{}_{}{}^{}\mathrm{S}$ reactions have been studied at 75-MeV bombarding energy. The angular distributions have been analyzed with exact finite-range distorted-wave Born approximation calculations assuming a direct $\alpha$-cluster transfer. The calculations account for the shapes of the experimental angular distributions reasonably well. For the ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$(${}_{}{}^6{}_{}{}^{}\mathrm{Li}$,$d$)${}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}$ reaction, the extracted relative $\alpha$-particle spectroscopic factors for the ${}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}$ ground state band are in good agreement with theoretical predictions, while those for the ${\mathrm{O}}^{-}$ excited band are in disagreement with them. For the ${}_{}{}^{28}{}_{}{}^{}\mathrm{Si}$(${}_{}{}^6{}_{}{}^{}\mathrm{Li}$,$d$)${}_{}{}^{32}{}_{}{}^{}\mathrm{S}$ reaction, spectroscopic factors are extracted for low-lying states of ${}_{}{}^{32}{}_{}{}^{}\mathrm{S}$ and compared with those from other $\alpha$-transfer reactions. Some strongly populated states have been observed at high excitation energies of ${}_{}{}^{32}{}_{}{}^{}\mathrm{S}$.

NUCLEAR REACTIONS ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$(${}_{}{}^6{}_{}{}^{}\mathrm{Li}$,$d$)${}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}$, ${}_{}{}^{28}{}_{}{}^{}\mathrm{Si}$(${}_{}{}^6{}_{}{}^{}\mathrm{Li}$,$d$)${}_{}{}^{32}{}_{}{}^{}\mathrm{S}$, $E=75\mathrm{}$ MeV, measured $\sigma \left(\theta \right)$, DWBA analysis spectroscopic factors.

• Received 20 July 1981

DOI:https://doi.org/10.1103/PhysRevC.24.2556