An excitation function for resonance elastic scattering of $\alpha$ particles on ${}^{18}\mathrm{O}$ and ${}^{18}\mathrm{Ne}$ was measured using the method of inverse geometry with a very thick target. Spectroscopic information was obtained for 23 levels in the excitation energy region from 11.9 to $13.7\text{MeV}$ in ${}^{22}\mathrm{Ne}$. Twelve of them are new. General features of $\alpha$-cluster bands in ${}^{22}\mathrm{Ne}$ are analyzed in the framework of the potential model with a deep potential well. Predictions for the ${11}^{-}$ level in ${}^{22}\mathrm{Ne}$, as well as for the isotopic shift of the cluster levels in ${}^{22}\mathrm{Mg}$, are given. Evidence is presented that new perspectives on the study of nuclear structure and nuclear spectroscopy can be obtained in complimentary measurements of $\alpha$-cluster states in mirror $N\ne Z$ nuclei.

• Received 10 July 2003

DOI:https://doi.org/10.1103/PhysRevC.69.024602