Pairing and the structure of the pf-shell N∼Z nuclei

1998/02/16 by A. Poves, Alfredo Poves, G. Martı́nez-Pinedo +1 · 6 citations
Physics and Astronomy · #Atomic and Molecular Physics #Nuclear physics research studies #Quantum Chromodynamics and Particle Interactions #nucl-th

paper · pdf · doi:10.1016/s0370-2693(98)00538-3

published as Phys.Lett. B430 (1998) 203-208 · 5 pages, RevTeX, 5 figures

arxiv created 1998/02/16 · openalex publication_date 1998/07/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The influence of the isoscalar and isovector L=0 pairing components of the effective nucleon-nucleon interaction is evaluated for several isobaric chains, in the framework of full pf shell model calculations. We show that the combined effect of both isospin channels of the pairing force is responsible for the appearance of T=1 ground states in N=Z odd-odd nuclei. However, no evidence is found relating them to the Wigner energy. We study the dependence of their contributions to the total energy on the rotational frecuency in the deformed nucleus 48Cr. Both decrease with increasing angular momentum and go to zero at the band termination. Below the backbending their net effect is a reduction of the moment of inertia, more than half of which comes from the proton-neutron channel.

Cited by

• Degeneracies whenT=0two body matrix elements are set equal to zero and Regge’s6jsymmetry relations
• Competition of isoscalar and isovector proton-neutron pairing in nuclei
• A number projected model with generalized pairing interaction
• Classification of states in proton–neutron pairing model
• The shell model as a unified view of nuclear structure
• Rotational structure of T=0 and T=1 bands in the N=Z nucleus 62Ga