Yield of High-Energy Gamma Rays from Proton Capture inBe9

Two yield curves have been taken for gamma rays of energy above 2.5 Mev and 5.6 Mev respectively, with proton energies from 150 kev up to 518 kev. The curve for gamma rays above 2.5 Mev shows a single broad resonance around 330-kev proton energy. After correction for barrier penetration the curve can be fitted by a Breit-Wigner formula with resonance energy 307 kev (corresponding to a level in ${\mathrm{B}}^{10}$ at 6.86 Mev) and with half-width 160 kev. The curve for gamma rays above 5.6 Mev also shows a nonresonant radiation, which consists of more energetic components.