Neutron-proton pairing in nuclear matter

Xiao-Hua Fan, Xin-le Shang, Jian-Min Dong, and Wei Zuo
Phys. Rev. C 99, 065804 – Published 7 June 2019

Abstract

The self-energy effect on the neutron-proton (np) pairing gap is investigated up to the third order within the framework of the extend Brueckner–Hartree–Fock (BHF) approach combined with the BCS theory. The self-energy up to the second-order contribution turns out to reduce strongly the effective energy gap, while the renormalization term enhances it significantly. In addition, the effect of the three-body force on the np pairing gap is shown to be negligible. To connect the present results with the np pairing in finite nuclei, an effective density-dependent zero-range pairing force is established with the parameters calibrated to the microscopically calculated energy gap.

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  • Received 24 December 2018

DOI:https://doi.org/10.1103/PhysRevC.99.065804

©2019 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

Xiao-Hua Fan1,2,3, Xin-le Shang1,2,*, Jian-Min Dong1,2, and Wei Zuo1,2

  • 1Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
  • 2School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
  • 3School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China

  • *shangxinle@impcas.ac.cn

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Vol. 99, Iss. 6 — June 2019

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