Equivalence of pairing correlations and intrinsic vortical currents in rotating nuclei

Abstract

The present paper establishes a link between pairing correlations in rotating nuclei and collective vortical modes in the intrinsic frame. We show that the latter can be embodied by a simple Chandrasekhar S-type coupling between rotational and intrinsic vortical collective modes. This results from a comparison between the solutions of microscopic calculations within the Hartree-Fock-Bogoliubov (HFB) and HF Routhian formalisms. The HF Routhian solutions are constrained to have the same Kelvin circulation expectation value as the HFB ones. It is shown in several mass regions, pairing regimes, and for various spin values that this procedure yields moments of inertia, angular velocities, and current distributions which are very similar within both formalisms. We finally present perspectives for further studies.