Investigation of α-CLUSTER Structure of 22NE and 22MG

Excitation function of resonance elastic scattering of α particles on ¹⁸O and ¹⁸Ne was measured in wide range of excitation energies. Measurements were performed using method of inverse geometry and very thick target. Doublets of twin-like 1^-, 3^-, 7^- and 9^- levels in ²²Ne, which have an α-cluster nature (reduced width of α decay is comparable with Wigner limit), were identified. Speculative explanation of doubling of α-cluster states in ²²Ne is given. Preliminary results for ²²Mg α-cluster structure are presented.