The yield of the 2.31-Mev gamma rays resulting from the inelastic scattering of protons by ${\mathrm{N}}^{14}$, leaving the residual nucleus in its first excited state, has been measured for bombarding energies ranging from 2.5 to 5.1 Mev. Four levels were found at energies of excitation in the compound nucleus ${\mathrm{O}}^{15}$ of 11.00, 11.08, 11.83, and 11.91 Mev, having experimental widths of 90, 25, 80, and 70 kev, respectively. Angular distributions of the gamma rays taken at the resonances were isotropic, in agreement with the previous assignment of spin 0 to the 2.31-Mev state in ${\mathrm{N}}^{14}$.

• Received 13 September 1956

DOI:https://doi.org/10.1103/PhysRev.104.1595