Differential cross sections of the ${\mathrm{B}}^{11}({\mathrm{He}}^3, \alpha ){\mathrm{B}}^{10}$ reaction leading to seven states up to 5.2-MeV excitation energy have been measured at forward angles at an incident energy $E\left({\mathrm{He}}^3\right)=33\mathrm{}$ MeV. The angular distributions have been analyzed in terms of the distorted-wave Born approximation on the assumption that the direct neutron-pickup process is predominant. Relative spectroscopic factors have been extracted and are found to be in good agreement with Cohen and Kurath's theoretical predictions and with the results of the ${\mathrm{B}}^{11}(p, d){\mathrm{B}}^{10}$ experiment at 33.6 MeV.

• Received 9 December 1968

DOI:https://doi.org/10.1103/PhysRev.180.967