~(16)O + ~(16)O molecular structures of positive- and negative-parity superdeformed bands in ~(34)S

摘要

The structures of excited states in ~(34) S are investigated using the antisymmetrized molecular dynamics and generator coordinate method (GCM). The GCM basis wave functions are calculated via energy variation with a constraint on the quadrupole deformation parameter β. By applying the GCM after parity and angular momentum projections, the coexistence of two positive- and one negative-parity superdeformed (SD) bands are predicted, and low-lying states and other deformed bands are obtained. The SD bands have structures of ~(16)O + ~(16)O + two valence neutrons in molecular orbitals around the two ~(16)O cores in a cluster picture. The configurations of the two valence neutrons are δ~2 and π~2 for the positive-parity SD bands and π~(1δ1) for the negativeparity SD band.