Excitation Energies And Spins Of The Yrast Superdeformed Band In Hg-191

The excitation energies and spins of the levels in the yrast superdeformed band of Hg-191 have been determined from two single-step gamma transitions and the quasicontinuum spectrum connecting the superdeformed and normal-deformed states. The results are compared with those from theoretical mean-field calculations with different interactions. A discussion of pairing in superdeformed states is also included.