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Temperature dependence of the nuclear symmetry energy and equation of state of charge neutral n + p + e + μ matter in beta equilibrium

B Behera, T R Routray and S K Tripathy

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The temperature and density dependence of the nuclear symmetry energy is studied in the nonrelativistic mean field theory by using a density-dependent finite range effective interaction. The temperature evolution of the interaction part of symmetry energy is decided by the nature of the finite range exchange interactions acting between a pair of like and unlike nucleons, an area which is less understood. In view of this, two cases corresponding to different strengths of exchange interaction between two like nucleons are considered to examine their influence on the temperature dependence of the nuclear symmetry energy. The symmetry energy obtained as a function of temperature and density is used to study the temperature dependence of leptonic fractions, proton fraction and equation of state of charge neutral n + p + e + μ matter under β-equilibrium for the two different cases.


PACS

21.65.-f Nuclear matter

97.60.Jd Neutron stars

21.10.-k Properties of nuclei; nuclear energy levels

Subjects

Nuclear physics

Astrophysics and astroparticles

Dates

Issue 12 (December 2009)

Received 9 May 2009

Published 28 October 2009



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