In order to investigate the possibility of direct interactions in ($\alpha , d$) reactions, the ${\mathrm{B}}^{10}(\alpha , d){\mathrm{C}}^{12}$ reaction has been studied for alpha-particle bombarding energies from 3.1 to 3.7 Mev. The yield curves are rather flat and show no typical resonance structures. The angular distributions show a peak at about ${\theta }_{\mathrm{c}.\mathrm{m}.\mathrm{}}=70\mathrm{}°$ and an increase of intensity in the backward direction over the entire alpha-particle energy range. These results indicate that the ${\mathrm{B}}^{10}(\alpha , d){\mathrm{C}}^{12}$ reaction proceeds mostly by direct processes, probably both stripping (or knock on) and heavy-particle stripping ones.

• Received 29 July 1959

DOI:https://doi.org/10.1103/PhysRev.117.214