Cross sections have been measured for the ${}_{}{}^{18}{}_{}{}^{}\mathrm{O}(\alpha ,n_{3,4}\gamma ){}_{}{}^{21}{}_{}{}^{}\mathrm{Ne}$ reactions which populate the $J^{\pi }={\frac{1}{2}}^{-},{\frac{1}{2}}^{+}$ doublet at 2.8 MeV excitation in ${}_{}{}^{21}{}_{}{}^{}\mathrm{Ne}$. These states are possible candidates for the study of nuclear parity mixing. Data are presented for $\alpha$-particle energies in the range 4.3 to 6.5 MeV.

NUCLEAR REACTIONS ${}_{}{}^{18}{}_{}{}^{}\mathrm{O}(\alpha ,n\gamma )$, $E=4.3\mathrm{}-6.5$ MeV; measured $\sigma \mathrm{}\left(E\right)\mathrm{}$ for ($\alpha ,n_3$) and ($\alpha ,n_4$). Enriched target.

• Received 19 May 1977

DOI:https://doi.org/10.1103/PhysRevC.16.1264