Radiative Capture of Alpha Particles to States ofO18andF18

Abstract

The radiative capture of alpha particles in ${\mathrm{N}}^{14}$ and ${\mathrm{C}}^{14}$ has been studied for bombarding energies between 1.3 and 3.0 Mev. Four narrow resonances were observed in the reaction ${\mathrm{N}}^{14}(\alpha , \gamma ){\mathrm{F}}^{18}$, corresponding to levels in ${\mathrm{F}}^{18}$ at 5.60, 5.67, 6.24, and 6.65 Mev. Two narrow resonances were observed in the reaction ${\mathrm{C}}^{14}(\alpha , \gamma ){\mathrm{O}}^{18}$, corresponding to levels in ${\mathrm{O}}^{18}$ at 7.63 and 8.05 Mev. These two are $1^{-}$ states.