Total Cross Sections of the ${\mathrm{O}}^{18}(p, \alpha ){\mathrm{N}}^{15}$ and ${\mathrm{O}}^{18}(p, n){\mathrm{F}}^{18}$ Reactions

The angular distribution of the $\alpha$ particles from the ${\mathrm{O}}^{18}(p, \alpha ){\mathrm{N}}^{15}$ reaction and the total cross section for the ${\mathrm{O}}^{18}(p, n){\mathrm{F}}^{18}$ reaction have been measured for proton energies between 2.60 and 2.97 Mev. Comparison of the total cross sections for the two reactions eliminates the previously observed differences in resonance energies in these reactions. At most energies the $\alpha$ particles are preferentially emitted in the forward and backward directions and the angular distributions are rapid functions of proton energy.