Nuclear expansion and symmetry energy of hot nuclei

Details Nuclear expansion and symmetry energy of hot nuclei Nuclear expansion and symmetry energy of hot nuclei

2008-02-05

arxiv.org/abs/0802.0664v1

J.Phys.G: Nucl. Part. Phys. 36 (2009) 075103

Physics

Nuclear Physics

Nuclear Experiment

10 pages, 2 figures

Scientific paper

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.

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