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Spin-triplet pairing in large nuclei
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abstract
The nuclear pairing condensate is expected to change character from spin-singlet to spin-triplet when the nucleus is very large and the neutron and proton numbers $Z,N$ are equal. We investigate the transition between these two phases within the framework of the Hartree-Fock-Bogoliubov equations, using a zero-range interaction to generate the pairing. We confirm that extremely large nucleus would indeed favor triplet pairing condensates, with the Hamiltonian parameters taken from known systematics. The favored phase is found to depend on the specific orbitals at the Fermi energy. The smallest nuclei with a well-developed spin-triplet condensate are in the mass region A ~ 130-140.
Forward citations
Cited by 2 Pith papers
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Novel Phases of a Baryon-Dense QCD-like Theory
Adding a baryon chemical potential to AMSB-deformed s-confining SQCD produces novel finite-density vacua with baryon-number and parity breaking, with both first- and second-order transitions.
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Proton-neutron pair correlations in neutron-rich nuclei
Spin-triplet proton-neutron pair correlations in neutron-rich Ca, Ni, and Sn isotopes are predicted to vary non-monotonically with neutron number, with enhancements tied to specific shell configurations.
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