Isospin singlet<mml:mn/>(pn)<mml:mn/>pairing and quartetting contribution to the binding energy of nuclei

1999/06/29 by G. Röpke, G. Roepke, A. Schnell +3 · 2 citations
Physics and Astronomy · #Advanced Chemical Physics Studies #Nuclear physics research studies #Superconductivity in MgB2 and Alloys #nucl-th

paper · pdf · doi:10.1103/physrevc.61.024306

published as Phys.Rev.C61:024306,2000 · 19 pages, 19 figures, submitted to PRC

arxiv created 1999/06/29 · openalex publication_date 2000/01/14 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Isospin singlet (pn) pairing as well as quartetting in nuclei is expected to arise near the symmetry line N=Z. Empirical values can be deduced from the nuclear binding energies applying special filters. Within the local density approximation, theoretical estimates for finite nuclei are obtained from results for the condensation energy of asymmetric nuclear matter. It is shown that the isospin singlet condensation energy drops down abruptly for |N\ensuremath-Z|\ensuremath≈4 for medium nuclei in the region A=40. Furthermore, \ensuremathα-like quartetting and the influence of excitations are discussed.

Citations

• Nucleon spectral function at finite temperature and the onset of superfluidity in nuclear matter
• Supernova electron capture rates for 55Co and 56Ni
• Competition of isoscalar and isovector proton-neutron pairing in nuclei

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• A number projected model with generalized pairing interaction
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