11 Result(s)
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Article
Pion tensor force and nuclear binding energy in the relativistic Hartree-Fock formalism
The binding energies of several isotopic families are studied within the relativistic Hartree-Fock approximation with the pseudovector coupling for the πN vertex, to find out a suitable strength for the effective...
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Article
Nuclear relativistic Hartree-Fock approximation with weakened pion tensor force
Properties linked to the single-particle energies, as nuclear spectra, spin-orbit splittings and shell gaps are investigated in the framework of the relativistic Hartree-Fock approximation with pseudovector co...
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Article
Nuclear relativistic hartree-fock approximation with effective pions
The effect of an interaction between the σ- and π-meson fields, as well as that of the mixture of pseudoscalar (PS) and pseudovector (PV) couplings for the πN vertex on the shell structure of finite nuclei are an...
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Article
Isotopic dependence of the nuclear charge radii and binding energies in the relativistic Hartree-Fock formalism
Relativistic nonlinear models based on the Hartree and Hartree-Fock approximations, including the σ, ω, π, and ρ mesons, are worked out to explore the behavior of the nuclear charge radii and the binding energies...
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Article
New insights on pseudospin doublets in nuclei
The relevance of pseudospin symmetry in nuclei is considered. New insights are obtained from looking at the continuous transition from a non-relativistic model satisfying spin symmetry to another one satisfyin...
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Article
Pseudospin symmetry as an accidental symmetry in the relativistic framework
We analyse the arguments used in the relativistic context to base the quasi-degeneracy of pseudospin doublets (PSDs) observed in atomic nuclei on the smallness of the single-particle central potential (Σ ...
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Article
Pseudospin symmetry in the Dirac phenomenology
In the phenomenological relativistic framework of the Dirac equation for spherical nuclei, we use different kinds of single-particle central potentials ( ΣS + Σ0 to investigate certain aspects of the spin and ps...
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Article
Pseudospin symmetry in finite nuclei
The pseudospin symmetry (PSS) is an important feature of the nuclear structure. Most of the authors working in this field at present consider the PSS as an approximate symmetry, although there exist certain es...
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Article
The spin and pseudospin symmetries in the relativistic formalism: Similarities and differences
The effects of the symmetry breaking terms, spin-orbit potential (SOP) and pseudospin-orbit potential (PSOP), in the spin and pseudospin symmetries, respectively, are studied in a comparative way. The analytic...
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Article
Origin of the pseudospin symmetry in the relativistic formalism
The grounds on which the nuclear pseudospin symmetry (PSS) is supposed to be based are analysed within the relativistic mean-field framework. A connection between the mechanisms responsible for the spin-orbit ...
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Article
Reliability of the pseudospin symmetry in atomic nuclei
The reliability of the pseudospin symmetry (PSS) in atomic nuclei is analyzed in the framework of the relativistic Hartree approach. We find that the nuclear surface strongly increases the effect of the pseudo...
