α cluster structures in unbound states of¹⁹Ne

Abstract

Cluster structures in19 Ne are studied by the microscopic and macroscopic cluster models. In the microscopic calculation, the coupled-channels problem of (α+ 15 O) + ( 3 He+ 16 O) are solved, and the calculated energy spectra nicely reproduce the low-lying levels. In the macroscopic approach, the α + 15 O potential model is applied. The calculation of the potential model predicts the existence of the resonances above the α threshold, which has a weak-coupling structure of the α particle plus one hole inside of the 16 O nucleus. The coupling effect of the 5p-2h configuration to