A study of the excited states of ${}_{}{}^{12}{}_{}{}^{}\mathrm{N}$ has been made using the ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}({}_{}{}^3{}_{}{}^{}\mathrm{He},t){}_{}{}^{12}{}_{}{}^{}\mathrm{N}$ reaction at $E\left({}_{}{}^3{}_{}{}^{}\mathrm{He}\right)=49.3\mathrm{}$ MeV and the Berkeley magnetic spectrometer. We confirm a state of $E_x=2.415\mathrm{}\pm 0.020$ MeV, ${\Gamma }_{\mathrm{c}.\mathrm{m}.\mathrm{}}=45\mathrm{}\pm 15$ keV, and we report four new states ${}_{}{}^{12}{}_{}{}^{}\mathrm{N}$*(6.10, 7.13, 9.42, 9.90) with ${\Gamma }_{\mathrm{c}.\mathrm{m}.\mathrm{}}\sim 0.3, 0.5, \sim 0.2, \mathrm{and} 0.1$ MeV. Comparison with earlier ${}_{}{}^3{}_{}{}^{}\mathrm{He},n$ work reveals some inconsistencies, and comparison with the analog region in the mirror nucleus ${}_{}{}^{12}{}_{}{}^{}\mathrm{B}$ shows that the structure of ${}_{}{}^{12}{}_{}{}^{}\mathrm{N}$ remains poorly known. NUCLEAR REACTIONS ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}({}_{}{}^3{}_{}{}^{}\mathrm{He},t)$, $E=49.3\mathrm{}$ MeV; measured $\sigma \left(\theta \right)$. $\Gamma$, ${}_{}{}^{12}{}_{}{}^{}\mathrm{N}$, deduced levels.

• Received 4 November 1975

DOI:https://doi.org/10.1103/PhysRevC.13.933