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Title: Symmetry energy of warm nuclear systems
Author: Agrawal, B. K.
De, J. N.
Samaddar, S. K.
Centelles Aixalà, Mario
Viñas Gausí, Xavier
Keywords: Física nuclear
Partícules (Física nuclear)
Fusió nuclear
Nuclear physics
Particles (Nuclear physics)
Nuclear fusion
Issue Date: 2014
Publisher: Società Italiana di Fisica & Springer Verlag
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.
Note: Versió postprint del document publicat a:
It is part of: European Physical Journal A, 2014, vol. 50, num. 2, p. 19-1-19-11
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ISSN: 1434-6001
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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