${}^{16}\mathrm{O}{+}^{16}\mathrm{O}$ nature of the superdeformed band of ${}^{32}\mathrm{S}$ and the evolution of the molecular structure

Abstract

The relation between the superdeformed band of ${}^{32}\mathrm{S}$ and ${}^{16}\mathrm{O}{+}^{16}\mathrm{O}$ molecular bands is studied by the deformed-base antisymmetrized molecular dynamics with the Gogny D1S force. It is found that the obtained superdeformed band members of ${}^{32}\mathrm{S}$ have considerable amount of the ${}^{16}\mathrm{O}{+}^{16}\mathrm{O}$ component. Above the superdeformed band, we have obtained two excited rotational bands which have more prominent character of the ${}^{16}\mathrm{O}{+}^{16}\mathrm{O}$ molecular band. These three rotational bands are regarded as a series of ${}^{16}\mathrm{O}{+}^{16}\mathrm{O}$ molecular bands which were predicted by using the unique ${}^{16}\mathrm{O}$ -${}^{16}\mathrm{O}$ optical potentil. As the excitation energy and principal quantum number of the relative motion increase, the ${}^{16}\mathrm{O}{+}^{16}\mathrm{O}$ cluster structure becomes more prominent but at the same time, the band members are fragmented into several states.