Proton-neutron pairing in the deformed BCS approach

F. Šimkovic, Ch. C. Moustakidis, L. Pacearescu, and Amand Faessler
Phys. Rev. C 68, 054319 – Published 24 November 2003

Abstract

We examine isovector and isoscalar proton-neutron-pairing correlations for the ground state of even-even Ge isotopes with mass number A=6476 within the deformed BCS approach. For N=Z Ge3264 the BCS solution with only T=0 proton-neutron pairs is found. For other nuclear systems (N>Z) a coexistence of T=0 and T=1 pairs in the BCS wave function is observed. The problem of fixing of strengths of isoscalar and isovector pairing interactions is addressed. The dependence of number of like and unlike pairs in the BCS ground state on the difference between number of neutrons and protons is discussed. We found that for nuclei with N much bigger than Z the effect of proton-neutron pairing is small but not negligible.

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  • Received 3 April 2003

DOI:https://doi.org/10.1103/PhysRevC.68.054319

©2003 American Physical Society

Authors & Affiliations

F. Šimkovic1,2, Ch. C. Moustakidis1, L. Pacearescu1, and Amand Faessler1

  • 1Institute of Theoretical Physics, University of Tuebingen, D-72076 Tuebingen, Germany
  • 2Department of Nuclear Physics, Comenius University, SK-842 15 Bratislava, Slovakia

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Vol. 68, Iss. 5 — November 2003

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