The ${}_{}{}^{18}{}_{}{}^{}\mathrm{O}({}_{}{}^7{}_{}{}^{}\mathrm{Li},t){}_{}{}^{22}{}_{}{}^{}\mathrm{Ne}$ reaction has been studied at 12-MeV incident energy. Angular distributions have been extracted for 22 triton groups leading to states in ${}_{}{}^{22}{}_{}{}^{}\mathrm{Ne}$ up to 8.59 MeV in excitation energy. The experimental angular distributions have been compared with the predictions of the Coulomb-distorted plane-wave model. $L$ values have been assigned and relative $\alpha$-cluster widths have been extracted for the strong transitions. Significant $\alpha$ clustering has been observed for 10 states in ${}_{}{}^{22}{}_{}{}^{}\mathrm{Ne}$ between 6.24- and 8.59-MeV excitation energy. Spin and parity assignments have been made to these states from the combined results of the ${}_{}{}^{18}{}_{}{}^{}\mathrm{O}({}_{}{}^7{}_{}{}^{}\mathrm{Li},t){}_{}{}^{22}{}_{}{}^{}\mathrm{Ne}$ and ${}_{}{}^{21}{}_{}{}^{}\mathrm{Ne}\mathrm{}(d,p)\mathrm{}{}_{}{}^{22}{}_{}{}^{}\mathrm{Ne}$ reaction. The classification of the $\alpha$-cluster states into rotational bands has been discussed within the framework of the SU(3) model.

• Received 17 May 1972

DOI:https://doi.org/10.1103/PhysRevC.6.893