The ${}_{}{}^9{}_{}{}^{}\mathrm{Be}({}_{}{}^7{}_{}{}^{}\mathrm{Li}, \alpha ){}_{}{}^{12}{}_{}{}^{}\mathrm{B}$ reaction has been studied at $E\left({}_{}{}^7{}_{}{}^{}\mathrm{Li}\right)=20\mathrm{}$ MeV using a multiangle spectrograph. Thirty-seven states of ${}_{}{}^{12}{}_{}{}^{}\mathrm{B}$ with $E_x<14\mathrm{}$ MeV have been observed. Angular distributions are presented for the first seven states of ${}_{}{}^{12}{}_{}{}^{}\mathrm{B}$. The neutron reduced widths extracted from experimental total widths of the positive parity states are compared with shell-model predictions.

NUCLEAR REACTIONS ${}_{}{}^9{}_{}{}^{}\mathrm{Be}({}_{}{}^7{}_{}{}^{}\mathrm{Li}, \alpha )$, $E=20\mathrm{}$ MeV; measured $\sigma \left(\theta \right)$. $\Gamma$, ${}_{}{}^{12}{}_{}{}^{}\mathrm{B}$ deduced levels.

• Received 22 July 1975

DOI:https://doi.org/10.1103/PhysRevC.12.1868