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

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 5h {combining short solidus overlay}, 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.