Isovector and isoscalar superfluid phases in rotating nuclei

Details Isovector and isoscalar superfluid phases in rotating nuclei Isovector and isoscalar superfluid phases in rotating nuclei

2000-05-15

arxiv.org/abs/nucl-th/0005043v1

Phys.Rev. C62 (2000) 051302

Physics

Nuclear Physics

Nuclear Theory

5 pages, 4 figures, submitted to PRC

Scientific paper

10.1103/PhysRevC.62.051302

The subtle interplay between the two nuclear superfluids, isovector T=1 and isoscalar T=0 phases, are investigated in an exactly soluble model. It is shown that T=1 and T=0 pair-modes decouple in the exact calculations with the T=1 pair-energy being independent of the T=0 pair-strength and vice-versa. In the rotating-field, the isoscalar correlations remain constant in contrast to the well known quenching of isovector pairing. An increase of the isoscalar (J=1, T=0) pair-field results in a delay of the bandcrossing frequency. This behaviour is shown to be present only near the N=Z line and its experimental confirmation would imply a strong signature for isoscalar pairing collectivity. The solutions of the exact model are also discussed in the Hartree-Fock-Bogoliubov approximation.

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