Role of static and dynamic pairing correlations in the superdeformed band of 152Dy

Abstract

The value of the pairing gap of both protons and neutrons is zero essentially over the whole range of the rotational frequency where the (+,0)-superdeformed configuration of 152Dy has been observed. Pairing fluctuations give rise to a dynamic dealignment by about 5 h ̷ , and alters the frequency dependence of the angular momentum to make I (2)> I (1) at low frequencies, the difference becoming smaller as the angular momentum increases. These results indicate the important role played by dynamical pairing correlations in the superdeformed rotational band of 152Dy.