Isoscalar-isovector proton-neutron pairing and quartet condensation in N=Z nuclei

M. Sambataro and N. Sandulescu
Phys. Rev. C 93, 054320 – Published 17 May 2016

Abstract

We show that the correlations generated in the ground state of N=Z nuclei by the isovector and isoscalar pairing forces can be treated with high precision as a condensate of alpha-like quartets. To treat these correlations, the quartet condensation model (QCM) is extended to the treatment of spherically symmetric isovector (T=1,J=0) and isoscalar (T=0,J=1) pairing forces. Within the QCM, we discuss the competition between T=1 and T=0 pairing correlations in the case of a two-level model and for N=Z nuclei with nucleons moving in the open shells above O16,Ca40, and Sn100. We show that, in N=Z systems, isovector and isoscalar proton-neutron pairing correlations always coexist.

  • Figure
  • Figure
  • Received 21 January 2016

DOI:https://doi.org/10.1103/PhysRevC.93.054320

©2016 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

M. Sambataro1 and N. Sandulescu2

  • 1Istituto Nazionale di Fisica Nucleare - Sezione di Catania, Via S. Sofia 64, I-95123 Catania, Italy
  • 2National Institute of Physics and Nuclear Engineering, P.O. Box MG-6, Magurele, Bucharest, Romania

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Issue

Vol. 93, Iss. 5 — May 2016

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