We have performed two independent measurements of the ${}_{}{}^{11}{}_{}{}^{}\mathrm{B}(p, {\gamma }_0){}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ reaction over the energy range of $E_p=5-14\mathrm{}$ MeV. The two measurements are in good agreement with each other and indicate that the previously accepted results are in error. The new values for the ${\gamma }_0$ cross section reported here resolve several outstanding conflicts. Their implications are discussed.

NUCLEAR REACTIONS ${}_{}{}^{11}{}_{}{}^{}\mathrm{B}(p, {\gamma }_0){}_{}{}^{12}{}_{}{}^{}\mathrm{C}$, $5\le E_p\le 14$ MeV; measured $E_{\gamma }$, absolute cross sections for $\frac{d\sigma }{d\Omega }$ (90°, $E_{{\gamma }_0}$), $\frac{d\sigma }{d\Omega }$ (90°, $E_{{\gamma }_1}$).

• Received 15 December 1981

DOI:https://doi.org/10.1103/PhysRevC.26.332