Symmetry energy from fragment observables in the canonical thermodynamic model

Details Symmetry energy from fragment observables in the canonical thermodynamic model Symmetry energy from fragment observables in the canonical thermodynamic model

2009-10-19

arxiv.org/abs/0910.3460v1

Physics

Nuclear Physics

Nuclear Theory

Submitted to Physical Review C

Scientific paper

Different formulas relying measurable fragment isotopic observables to the symmetry energy of excited nuclei have been proposed and applied to the analysis of heavy ion collision data in the recent literature. In this paper we examine the quality of the different expressions in the framework of the McGill Canonical Thermodynamic Model. We show that even in the idealized situation of canonical equilibrium and in the absence of secondary decay, these formulas do not give a precise reconstruction of the symmetry energy of the fragmenting source. However, both isotopic widths and isoscaling appear very well correlated to the physical symmetry energy.

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