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

Abstract

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.

Authors:
 [1]
  1. Saha Institute of Nuclear Physics, Kolkata 700064 (India)
Publication Date:
OSTI Identifier:
21386684
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 81; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevC.81.034323; (c) 2010 The American Physical Society; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Agrawal, B K. Asymmetric nuclear matter and neutron skin in an extended relativistic mean-field model. United States: N. p., 2010. Web. doi:10.1103/PHYSREVC.81.034323.
Agrawal, B K. Asymmetric nuclear matter and neutron skin in an extended relativistic mean-field model. United States. https://doi.org/10.1103/PHYSREVC.81.034323
Agrawal, B K. 2010. "Asymmetric nuclear matter and neutron skin in an extended relativistic mean-field model". United States. https://doi.org/10.1103/PHYSREVC.81.034323.
@article{osti_21386684,
title = {Asymmetric nuclear matter and neutron skin in an extended relativistic mean-field model},
author = {Agrawal, B K},
abstractNote = {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.},
doi = {10.1103/PHYSREVC.81.034323},
url = {https://www.osti.gov/biblio/21386684}, journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 3,
volume = 81,
place = {United States},
year = {2010},
month = {3}
}