The ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}(\alpha , \alpha ){}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ excitation curve has been measured at 177.9° center of mass between 12.8 and 14.8 MeV incident energy with an energy resolution of 90 keV. Angular distributions taken at three resonance energies have been analyzed by a one-Regge-pole model: The $7^{-}$ spin of the 15.41 MeV level in ${}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}$ is confirmed and two new $6^{+}$ levels are found at 15.72 and 15.97 MeV in ${}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}$.

NUCLEAR REACTION ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}(\alpha , \alpha )$, $E=12.8-14.8\mathrm{}$ MeV; measured $\sigma (E; 177.9°)$; measured $\sigma \left(\theta \right)$ at $E=13.08, 13.37, 13.53, 13.68, 13.89, \mathrm{and} 14.12$ MeV; one-Regge-pole model analysis; ${}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}$ levels deduced $J$, $\pi$.

• Received 30 September 1974

DOI:https://doi.org/10.1103/PhysRevC.11.631