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Shell Effects in Nuclei with Vector Self-Coupling of Omega Meson in Relativistic Hartree-Bogoliubov Theory | | M.M. Sharma
; A.R. Farhan
; S. Mythili
; | | Date: |
6 Feb 2000 | | Journal: | Phys.Rev. C61 (2000) 054306 | | Subject: | nucl-th | | Abstract: | Shell effects in nuclei about the stability line are investigated within the framework of the Relativistic Hartree-Bogoliubov (RHB) theory with self-consistent finite-range pairing. Using 2-neutron separation energies of Ni and Sn isotopes, the role of $sigma$- and $omega$-meson couplings on the shell effects in nuclei is examined. It is observed that the existing successful nuclear forces (Lagrangian parameter sets) based upon the nonlinear scalar coupling of $sigma$-meson exhibit shell effects which are stronger than suggested by the experimental data. We have introduced nonlinear vector self-coupling of $omega$-meson in the RHB theory. It is shown that the inclusion of the vector self-coupling of $omega$-meson in addition to the nonlinear scalar coupling of $sigma$-meson provides a good agreement with the experimental data on shell effects in nuclei about the stability line. A comparison of the shell effects in the RHB theory is made with the Hartree-Fock Bogoliubov approach using the Skyrme force SkP. It is shown that the oft-discussed shell quenching with SkP is not consistent with the available experimental data. | | Source: | arXiv, nucl-th/0002017 | | Services: | Forum | Review | PDF | Favorites | |
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