Properties of isoscalar-pair condensates

P. van Isacker (1) , A.O. Macchiavelli (2) , P. Fallon (2) , S. Zerguine (3)

1 GANIL - Grand Accélérateur National d'Ions Lourds
2 LBNL - Lawrence Berkeley National Laboratory [Berkeley]
3 Department of Physics, PRIMALAB Laboratory

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.

Domaines: Physique Nucléaire Théorique [nucl-th]

P. van Isacker, A.O. Macchiavelli, P. Fallon, S. Zerguine. Properties of isoscalar-pair condensates. Physical Review C, 2016, 94, pp.024324. ⟨10.1103/PhysRevC.94.024324⟩. ⟨in2p3-01348009⟩