We perform a detailed calculation of the pairing properties of the inner crust of a neutron star. We focus on a specific density, and take into account the coexistence of a nuclear lattice with a superfluid gas of neutrons. The Hartree-Fock-Bogoliubov (HFB) equations are solved adding the matrix elements of the direct nucleon-nucleon interaction and those of the interaction induced by medium-polarization effects. The latter are obtained after a detailed calculation of the excited states of the system, within the random phase approximation. It is concluded that for the density considered, polarization processes reduce the pairing gap of about a factor of 2.
Excitation modes and pairing interaction in the inner crust of neutron stars / G. Gori, F. Ramponi, F. Barranco, R. A. Broglia, G. Colo', D. Sarchi, E. Vigezzi. - In: NUCLEAR PHYSICS. A. - ISSN 0375-9474. - 731:1-4(2004), pp. 401-408.
Excitation modes and pairing interaction in the inner crust of neutron stars
G. GoriPrimo
;F. RamponiSecondo
;R. A. Broglia;G. Colo';D. SarchiPenultimo
;
2004
Abstract
We perform a detailed calculation of the pairing properties of the inner crust of a neutron star. We focus on a specific density, and take into account the coexistence of a nuclear lattice with a superfluid gas of neutrons. The Hartree-Fock-Bogoliubov (HFB) equations are solved adding the matrix elements of the direct nucleon-nucleon interaction and those of the interaction induced by medium-polarization effects. The latter are obtained after a detailed calculation of the excited states of the system, within the random phase approximation. It is concluded that for the density considered, polarization processes reduce the pairing gap of about a factor of 2.
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