The cross sections of the reactions ${\mathrm{B}}^{10}({\mathrm{Li}}^6, {\alpha }_0){\mathrm{C}}^{12}$ and ${\mathrm{B}}^{10}({\mathrm{Li}}^6, {\alpha }_1){\mathrm{C}}^{12*}$ have been measured at 0° for ${\mathrm{Li}}^6$ energies of 3.20 to 13.60 MeV. The ${\mathrm{Be}}^9({\mathrm{Li}}^6, p_0){\mathrm{C}}^{14}$ and ${\mathrm{Be}}^9({\mathrm{Li}}^9, p_1){\mathrm{C}}^{14*}$ cross sections at 0° were measured for ${\mathrm{Li}}^6$ energies ranging from 3.84 to 6.40 MeV. The analysis of the yield curves in terms of Ericson fluctuation theory gave values of the average level width, $\Gamma$, of 1.40 MeV for ${\mathrm{O}}^{16}$ at 36-MeV excitation and approximately 0.40 MeV for ${\mathrm{N}}^{15}$ at 28-MeV excitation. From the same data it was found that there is a considerable contribution of direct reaction mechanism as well as compound nucleus to both reactions.

• Received 15 February 1967

DOI:https://doi.org/10.1103/PhysRev.160.809