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    Isospin-dependent properties of asymmetric nuclear matter in relativistic mean field models RID A-2398-2009

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    PhysRevC.76.054316.pdf (2.035Mb)
    Date
    2007
    Author
    Chen, Lie-Wen
    Ko, Che Ming
    Li, Bao-An.
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    Abstract
    Using various relativistic mean-field models, including nonlinear ones with meson field self-interactions, models with density-dependent meson-nucleon couplings, and point-coupling models without meson fields, we have studied the isospin-dependent bulk and single-particle properties of asymmetric nuclear matter. In particular, we have determined the density dependence of nuclear symmetry energy from these different relativistic mean-field models and compared the results with the constraints recently extracted from analyses of experimental data on isospin diffusion and isotopic scaling in intermediate energy heavy-ion collisions as well as from measured isotopic dependence of the giant monopole resonances in even-A Sn isotopes. Among the 23 parameter sets in the relativistic mean-field model that are commonly used for nuclear structure studies, only a few are found to give symmetry energies that are consistent with the empirical constraints. We have also studied the nuclear symmetry potential and the isospin splitting of the nucleon effective mass in isospin asymmetric nuclear matter. We find that both the momentum dependence of the nuclear symmetry potential at fixed baryon density and the isospin splitting of the nucleon effective mass in neutron-rich nuclear matter depend not only on the nuclear interactions but also on the definition of the nucleon optical potential.
    URI
    http://dx.doi.org/10.1103/PhysRevC.76.054316
    https://hdl.handle.net/1969.1/127041
    Description
    Journals published by the American Physical Society can be found at http://publish.aps.org/
    Subject
    HEAVY-ION COLLISIONS
    EQUATION-OF-STATE
    GIANT MONOPOLE RESONANCE
    HARTREE-FOCK THEORY
    DIRAC-BRUECKNER APPROACH
    NEUTRON-STARS
    FINITE
    NUCLEI
    EXOTIC NUCLEI
    SYMMETRY ENERGY
    SKYRME PARAMETRIZATION
    Physics
    Department
    Physics and Astronomy
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    Citation
    Lie-Wen Chen, Che Ming Ko and Bao-An Li. Phys.Rev.C 76 054316 2007. "Copyright (2007) by the American Physical Society."

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