Competition Between T=0 and T=1 Pairing in Proton-Rich Nuclei
W. Satuła, R. Wyss
Abstract
A cranked mean-field model with two-body T=1 and T=0 pairing interactions is presented. Approximate projection onto good particle-number is enforced via an extended Lipkin-Nogami scheme. Our calculations suggest the simultaneous presence of both T=0 and T=1 pairing modes in N=Z nuclei. The transitions between different pairing phases are discussed as a function of neutron/proton excess, Tz, and rotational frequency, ω. The additional binding energy due to the T=0 np-pairing correlations, is suggested as a possible microscopic explanation of the Wigner energy term in even-even nuclei.
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