Properties of isoscalar-pair condensates

Abstract : It is pointed out that the ground state of $n$ neutrons and $n$ protons in a single-$j$ shell, interacting through an isoscalar ($T=0$) pairing force, is not paired, $J=0$, but rather spin-aligned, $J=n$. This observation is explained in the context of a model of isoscalar $P$ ($J=1$) pairs,which is mapped onto a system of $p$ bosons, leading to an approximate analytic solutionof the isoscalar-pairing limit in $jj$ coupling.
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Submitted on : Friday, July 22, 2016 - 11:06:55 AM
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P. van Isacker, A.O. Macchiavelli, P. Fallon, S. Zerguine. Properties of isoscalar-pair condensates. Physical Review C, American Physical Society, 2016, 94, pp.024324. ⟨10.1103/PhysRevC.94.024324⟩. ⟨in2p3-01348009⟩

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