Isoscaling, Symmetry Energy and Thermodynamic Models

Details Isoscaling, Symmetry Energy and Thermodynamic Models Isoscaling, Symmetry Energy and Thermodynamic Models

2007-11-30

arxiv.org/abs/0711.4992v2

Nucl.Phys.A813:293-312,2008

Physics

Nuclear Physics

Nuclear Theory

total 27 pages including 9 figures

Scientific paper

10.1016/j.nuclphysa.2008.09.004

The isoscaling parameter usually denoted by $\alpha$ depends upon both the symmetry energy coefficient and the isotopic contents of the dissociating systems. We compute $\alpha$ in theoretical models: first in a simple mean field model and then in thermodynamic models using both grand canonical and canonical ensembles. For finite systems the canonical ensemble is much more appropriate. The model values of $\alpha$ are compared with a much used standard formula. Next we turn to cases where in experiments, there are significant deviations from isoscaling. We show that in such cases, although the grand canonical model fails, the canonical model is capable of explaining the data.

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