A previously unobserved narrow resonance was found in the ${}_{}{}^{14}{}_{}{}^{}\mathrm{N}(p, \gamma ){}_{}{}^{15}{}_{}{}^{}\mathrm{O}$ reaction at $E_p=3.392\mathrm{}\pm 0.005$ MeV ($E_x=10.459\mathrm{}\pm 0.005$ MeV) with $\Gamma <2\mathrm{}$ keV, $\omega \gamma =29\mathrm{}\pm 10$ meV, and $\gamma$ decay branchings 62% to the 5.24- and 38% to the 7.28-MeV final states. The ${}_{}{}^{15}{}_{}{}^{}\mathrm{O}$ state corresponding to this resonance is identified as the 10.45-MeV, $J\ge \frac{9}{2}$ state observed in ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}({}_{}{}^6{}_{}{}^{}\mathrm{Li}, t)$ which is presumed to be the analog of the $\frac{9}{2^{+}}$ state at 10.693 MeV in ${}_{}{}^{15}{}_{}{}^{}\mathrm{N}$. The decay of the ${}_{}{}^{15}{}_{}{}^{}\mathrm{O}$ 10.47-MeV level is also measured.

NUCLEAR REACTIONS ${}_{}{}^{14}{}_{}{}^{}\mathrm{N}(p, \gamma )$, $E_p=3.15-3.5\mathrm{}$ MeV, measured $\sigma (E, \theta )$, deduced $E$, $\Gamma$, $\omega \gamma$, and branching ratios of the ${}_{}{}^{15}{}_{}{}^{}\mathrm{O}$ states at 10.459 and 10.47 MeV.

• Received 30 August 1976

DOI:https://doi.org/10.1103/PhysRevC.15.569