Nuclear expansion and symmetry energy of hot nuclei

Abstract

The decrease in the symmetry energy of hot nuclei populated in ${}^{58}$Ni + ${}^{58}$Ni, ${}^{58}$Fe + ${}^{58}$Ni and ${}^{58}$Fe + ${}^{58}$Fe reactions at beam energies of 30, 40, and 47 MeV/nucleon, as a function of excitation energy is studied. It is observed that this decrease is mainly a consequence of increasing expansion or decreasing density rather than the increasing temperature. The results are in good agreement with the recently reported microscopic calculation based on the Thomas-Fermi approach. An empirical relation to study the symmetry energy of finite nuclei in various mass region is proposed.

10 pages, 2 figures

References in corpus (7)

• The Skyrme Interaction in finite nuclei and nuclear matter
• Density dependence of the symmetry energy and the nuclear equation of state: A Dynamical and Statistical model perspective
• Symmetry energy and the isoscaling properties of the fragments produced in ${}^{40}$Ar, ${}^{40}$Ca + ${}^{58}$Fe, ${}^{58}$Ni reactions at 25 $-$ 53 MeV/nucleon
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• Nuclear expansion with excitation
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Cited by in corpus (6)

• Nuclear symmetry energy at subnormal densities from measured nuclear masses
• Nuclear symmetry energy: An experimental overview
• Symmetry energy from nuclear multifragmentation
• Heavy-ion Collisions: Direct and indirect probes of the density and temperature dependence of Esym
• Nuclear matter properties, phenomenological theory of clustering at the nuclear surface, and symmetry energy
• Isospin dependent hybrid model for studying isoscaling in heavy ion collisions around the Fermi energy domain