Screening effects in superfluid nuclear and neutron matter within Brueckner theory

L. G. Cao, U. Lombardo, and P. Schuck
Phys. Rev. C 74, 064301 – Published 1 December 2006

Abstract

Effects of medium polarization are studied for 1S0 pairing in neutron and nuclear matter. The screening potential is calculated in the RPA limit, suitably renormalized to cure the low density mechanical instability of nuclear matter. The self-energy corrections are consistently included resulting in a strong depletion of the Fermi surface. All medium effects are calculated based on the Brueckner theory. The 1S0 gap is determined from the generalized gap equation. The self-energy corrections always lead to a quenching of the gap, which is enhanced by the screening effect of the pairing potential in neutron matter, whereas it is almost completely compensated by the antiscreening effect in nuclear matter.

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  • Received 1 August 2006

DOI:https://doi.org/10.1103/PhysRevC.74.064301

©2006 American Physical Society

Authors & Affiliations

L. G. Cao1, U. Lombardo1,2, and P. Schuck3

  • 1Laboratori Nazionali del Sud, INFN, Via Santa Sofia 62, I-95123 Catania, Italy
  • 2Dipartimento di Fisica dell'Università, Viale Andrea Doria 6, I-95123 Catania, Italy
  • 3Institut de Physique Nucléaire, Université Paris-Sudd, F-91406 Orsay Cedex, France

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Vol. 74, Iss. 6 — December 2006

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