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Symmetry energy of warm nuclear systems

  • Regular Article - Theoretical Physics
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Abstract

The temperature dependence of the symmetry energy and symmetry free energy coefficients of infinite nuclear matter and of finite nuclei is investigated. For infinite matter, both these coefficients are found to have a weaker dependence on temperature at densities close to saturation; at low but homogeneous densities, the temperature dependence becomes stronger. For finite systems, different definitions of symmetry energy coefficients are encountered in the literature yielding different values. A resolution to this problem is suggested from a global liquid-drop-inspired fit of the energies and free energies of a host of nuclei covering the entire periodic table. The hot nucleus is modeled in a subtracted finite-temperature Thomas-Fermi framework, with dynamical surface phonon coupling to nucleonic motion plugged in. Contrary to infinite nuclear matter, a substantial change in the symmetry energy coefficients is observed for finite nuclei with temperature.

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Authors and Affiliations

  1. Saha Institute of Nuclear Physics, 1/AF Bidhannagar, 700064, Kolkata, India

    B. K. Agrawal, J. N. De & S. K. Samaddar

  2. Departament d’Estructura i Constituents de la Matèria, Facultat de Fısica, and Institut de Ciències del Cosmos, Universitat de Barcelona, Diagonal 645, 08028, Barcelona, Spain

    M. Centelles & X. Viñas

Authors
  1. B. K. Agrawal
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  2. J. N. De
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  3. S. K. Samaddar
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  4. M. Centelles
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  5. X. Viñas
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Corresponding author

Correspondence to B. K. Agrawal.

Additional information

Communicated by A. Ramos

Contribution to the Topical Issue “Nuclear Symmetry Energy” edited by Bao-An Li, Ángels Ramos, Giuseppe Verde, Isaac Vidaña.

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Agrawal, B.K., De, J.N., Samaddar, S.K. et al. Symmetry energy of warm nuclear systems. Eur. Phys. J. A 50, 19 (2014). https://doi.org/10.1140/epja/i2014-14019-8

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  • DOI: https://doi.org/10.1140/epja/i2014-14019-8

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