The ${}_{}{}^{17}{}_{}{}^{}\mathrm{O}\mathrm{}(p,n)\mathrm{}{}_{}{}^{17}{}_{}{}^{}\mathrm{F}$ reaction has been observed for the first time in the energy region from threshold to 5 MeV. Total neutron-production cross sections measured with good resolution are given. The reaction threshold is determined to be 3743 ± 6 keV. High-resolution total neutron cross sections are also given for the reaction ${}_{}{}^{18}{}_{}{}^{}\mathrm{O}\mathrm{}(p,n)\mathrm{}{}_{}{}^{18}{}_{}{}^{}\mathrm{F}$ from threshold to 4 MeV.

• Received 5 February 1973

DOI:https://doi.org/10.1103/PhysRevC.8.120