Nuclear relativistic hartree-fock approximation with effective pions

Journal Article · Sat Dec 15 04:00:00 EST 2012 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S1063778812110166· OSTI ID:22069251

Marcos, S; Lopez-Quelle, M; Niembro, R ^[1]; Savushkin, L N ^[2]

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1. Universidad de Cantabria (Spain)
2. St. Petersburg University for Telecommunications (Russian Federation)

The effect of an interaction between the {sigma}- and {pi}-meson fields, as well as that of the mixture of pseudoscalar (PS) and pseudovector (PV) couplings for the {pi}N vertex on the shell structure of finite nuclei are analyzed in the framework of different nonlinear nuclearmodels based on the relativistic Hartree-Fock approximation. For the case of a dominant {pi}N PV coupling, it is found that if the {sigma}-{pi} interaction generates an effective pion mass increasing with the nuclear density, the unrealistic effect of pions on the shell structure can be strongly reduced, keeping, roughly, the contribution of pions to the total binding energy. The {pi}N PS coupling increases slightly the spin-orbit splittings and the binding energy of the single-particle levels.

• OSTI ID: 22069251
• Journal Information: Physics of Atomic Nuclei, Journal Name: Physics of Atomic Nuclei Journal Issue: 12 Vol. 75; ISSN 1063-7788; ISSN PANUEO
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BINDING ENERGY
COUPLING
HARTREE-FOCK METHOD
NONLINEAR PROBLEMS
NUCLEAR MATTER
NUCLEI
PION-NUCLEON INTERACTIONS
PIONS
RELATIVISTIC RANGE
SHELL MODELS
SINGLE-PARTICLE MODEL
SPIN