Symmetry energy of fragments produced in multifragmentation

Abstract

Isospin properties of fragments measured in multifragmentation of 136Xe and 124Xe projectiles in mid-peripheral collisions with a lead target at 1 A GeV were studied within the statistical approach describing the liquid-gas nuclear phase transition. By analyzing the isoscaling phenomenon and the mean N-over-Z ratio of the fragments with Z=10-13 we have concluded that the symmetry energy of hot fragments produced in multifragment environment at subnuclear densities at high temperatures decreases in comparison with cold nuclei.

arXiv comment10 pages, 4 figures, background information on http://www-w2k.gsi.de/charms/

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• Isospin dependent hybrid model for studying isoscaling in heavy ion collisions around the Fermi energy domain
• Dispersion of longitudinal momentum distributions induced in fragmentation reactions
• Theoretical Study of Isotope Production in The Peripheral Heavy-ion Collision 136Xe + Pb at 1 GeV/nucleon