We have measured the ratio of resonance strengths for alpha capture on ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$ to the 4.77- and 5.16-MeV states of ${}_{}{}^{10}{}_{}{}^{}\mathrm{B}$. We find ωγ(4.77)/ωγ(5.16)=0.102± 0.004. When combined with the accepted value for ωγ(5.16) we determine the E2 strength of the 4.77- to 0.72-MeV level transition in ${}_{}{}^{10}{}_{}{}^{}\mathrm{B}$ to be B(E2)=21±2 $e^2$${\mathrm{fm}}^4$, in agreement with a previous measurement when center-of-mass corrections are properly taken into account. The agreement between our result and Kurath’s interpretive model for ${}_{}{}^{10}{}_{}{}^{}\mathrm{B}$ improves when collective effects in the 1p shell are included.

• Received 21 February 1985

DOI:https://doi.org/10.1103/PhysRevC.31.2295