Investigation of ²²Mg levels via resonant scattering of ¹⁸Ne + α

The α resonant scattering on ¹⁸Ne was measured in inverse kinematics to understand the α-clustering of proton-rich ²²Mg nucleus, performed at the CNS Radio-Isotope Beam Separator (CRIB) of Center for Nuclear Study, University of Tokyo, located at the RIBF of RIKEN Nishina Center. The excitation function of ²²Mg was obtained for the excitation energies of 10–16 MeV by adopting the thick-target method. Several resonances were evident in the present work, which implies the existence of energy levels with large α widths. Since energy levels were not clearly observed at the astrophysically important energy range, upper limits on the ¹⁸Ne (α, α)¹⁸Ne cross section were set. The astrophysical impact was also investigated by estimating the ¹⁸Ne (α, p)²¹Na cross section.