Shell structure and {rho}-tensor correlations in density dependent relativistic Hartree-Fock theory

Journal Article · Sat Sep 15 04:00:00 EDT 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.76.034314· OSTI ID:21064342

Wenhui, Long ^[1]; Sagawa, Hiroyuki ^[2]; Giai, Nguyen Van ^[3]; Jie, Meng ^[1]

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1. School of Physics, Peking University, 100871 Beijing (China)
2. Center for Mathematical Sciences, University of Aizu, Aizu-Wakamatsu, 965-8580 Fukushima (Japan)
3. Institut de Physique Nucleaire, CNRS-IN2P3, F-91406 Orsay Cedex (France)

A new effective interaction PKA1 with {rho}-tensor couplings for the density dependent relativistic Hartree-Fock (DDRHF) theory is presented. It is obtained by fitting selected empirical ground state and shell structure properties. It provides satisfactory descriptions of nuclear matter and the ground state properties of finite nuclei at the same quantitative level as recent DDRHF and relativistic mean field (RMF) models. Significant improvement in the single-particle spectra is also found due to the inclusion of {rho}-tensor couplings. As a result, PKA1 cures a common disease of the existing DDRHF and RMF Lagrangians, namely, the artificial shells at 58 and 92, and recovers the realistic subshell closure at 64. Moreover, the proper spin-orbit splittings and well-conserved pseudospin symmetry are obtained with the new effective interaction PKA1. Due to the extra binding introduced by the {rho}-tensor correlations, the balance between the nuclear attractions and the repulsions is changed, and this constitutes the physical reason for the improvement of the nuclear shell structure.

• OSTI ID: 21064342
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 76; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CORRELATIONS
DENSITY
GROUND STATES
HARTREE-FOCK METHOD
LAGRANGIAN FUNCTION
MEAN-FIELD THEORY
NUCLEAR MATTER
NUCLEAR STRUCTURE
RELATIVISTIC RANGE
SHELL MODELS
SINGLE-PARTICLE MODEL
SPIN
SYMMETRY
TENSORS