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arXiv · 1706.04222

Finite temperature pairing re-entrance in drip-line $^{48}$Ni nucleus

M. Belabbas·J. J. Li·J. Margueron
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Abstract

Finite-temperature Hartree-Fock-Bogoliubov theory using Skyrme interactions and Relativistic Hartree-Fock effective Lagrangians, predicts $^{48}$Ni as being a possible candidate for the finite temperature pairing re-entrance phenomenon. For this proton-drip-line nucleus, proton resonant states are expected to contribute substantially to pairing correlations and the two predicted critical temperatures are $T_{c1}\sim 0.08-0.2$~MeV and $T_{c2}\sim 0.7-0.9$~MeV. It is also shown that pairing re-entrance modifies the proton single particle energies around the Fermi level, as well as occupation numbers, and quasi-particle levels. The understanding of pairing re-entrance in $^{48}$Ni presently challenge our understanding of exotic matter under extreme conditions.

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M. Belabbas, J. J. Li, J. Margueron. 2017-06-13. Finite temperature pairing re-entrance in drip-line $^{48}$Ni nucleus. https://doi.org/10.1103/physrevc.96.024304

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