Yields of the ${\mathrm{O}}^{18}(p, \alpha ){\mathrm{N}}^{15}$ and ${\mathrm{O}}^{18}(p, n){\mathrm{F}}^{18}$ Reactions for Protons of 800 kev to 3500 kev

The yield of the ${\mathrm{O}}^{18}(p, \alpha ){\mathrm{N}}^{15}$ reaction was observed at 90° with respect to the ion beam for protons from 800 kev to 3500 kev. Resonances in the yield located fifteen energy levels in ${\mathrm{F}}^{19}$ not previously observed. Neutrons from the ${\mathrm{O}}^{18}(p, n){\mathrm{F}}^{18}$ reaction were observed in the forward direction above the threshold ($E_p=2577\mathrm{}\pm 8$ kev). Simultaneous observation of alpha particles and neutrons showed that the resonance energies for the two reactions agree in some cases but not in others.