Asymmetric nuclear matter and neutron skin in an extended relativistic mean-field model

Journal Article · Mon Mar 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.034323· OSTI ID:21386684

Agrawal, B K ^[1]

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1. Saha Institute of Nuclear Physics, Kolkata 700064 (India)

The density dependence of the symmetry energy, instrumental in understanding the behavior of the asymmetric nuclear matter, is investigated within the extended relativistic mean-field (ERMF) model, which includes the contributions from the self- and mixed-interaction terms for the scalar-isoscalar ({sigma}), vector-isoscalar ({omega}), and vector-isovector ({rho}) mesons up to the quartic order. Each of the 26 different parametrizations of the ERMF model employed is compatible with the bulk properties of the finite nuclei. The behavior of the symmetry energy for several parameter sets is found to be consistent with the empirical constraints on them as extracted from the analyses of the isospin diffusion data. The neutron-skin thickness in the {sup 208}Pb nucleus for these parameter sets of the ERMF model lies in the range of {approx}0.20-0.24 fm, which is in harmony with the thickness predicted by the Skyrme Hartree-Fock model. We also investigate the role of various mixed-interaction terms that are crucial for the density dependence of the symmetry energy.

• OSTI ID: 21386684
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 81, Issue 3; Other Information: DOI: 10.1103/PhysRevC.81.034323; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ASYMMETRY
DENSITY
DIFFUSION
HARTREE-FOCK METHOD
INTERACTIONS
ISOSPIN
ISOVECTORS
LEAD 208
MEAN-FIELD THEORY
MESONS
NEUTRONS
NUCLEAR MATTER
RELATIVISTIC RANGE
SKYRME POTENTIAL
SYMMETRY
APPROXIMATIONS
BARYONS
BOSONS
CALCULATION METHODS
ELEMENTARY PARTICLES
ENERGY RANGE
EVEN-EVEN NUCLEI
FERMIONS
HADRONS
HEAVY NUCLEI
ISOTOPES
LEAD ISOTOPES
MATTER
NUCLEI
NUCLEON-NUCLEON POTENTIAL
NUCLEONS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
POTENTIALS
STABLE ISOTOPES
TENSORS
VECTORS