(1) Sezione di Catania, INFN, 57 Corso Italia, I-95129 Catania, Italy;(2) Ecole Navale, Lanvéoc-Poulmic, 29240 Brest-Naval, France;(3) INFN-LNS, 44 Via S. Sofia, I-95123 Catania, Italy;(4) Dipartimento di Fisica, 57 Corso Italia, I-95129 Catania, Italy;(5) Kurchatov Institute, 123182 Moscow, Russia;(6) Insitut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, F-91406 Orsay-Cédex, France
Abstract:
The surface behavior of the pairing gap previously studied for semi-infinite nuclear matter is analyzed in the slab geometry. The gap-shape function is calculated in two cases: a) pairing with the Gogny force in a hard-wall potential and b) pairing with the separable Paris interaction in a Saxon-Woods mean-field potential. It is shown that the surface features are preserved in the case of slab geometry, being almost independent of the width of the slab. It is also demonstrated that the surface enhancement is strengthened as the absolute value of chemical potential decreases which simulates the approach to the nucleon drip line.-1Received: 3 March 2003, Published online: 30 September 2003PACS: 21.30.-x Nuclear forces - 21.60.-n Nuclear structure models and methods - 21.65.+f Nuclear matter - 26.60.+c Nuclear matter aspects of neutron stars
decreases which simulates the approach to the nucleon drip line.-1Received: 3 March 2003, Published online: 30 September 2003PACS: 21.30.-x Nuclear forces - 21.60.-n Nuclear structure models and methods - 21.65.+f Nuclear matter - 26.60.+c Nuclear matter aspects of neutron stars