Isospin fractionation : equilibrium versus spinodal decomposition
arXiv:nucl-th/0606034 · doi:10.1016/j.nuclphysa.2006.11.047
Abstract
This paper focuses on the isospin properties of the asymmetric nuclear-matter liquid-gas phase transition analyzed in a mean-field approach, using Skyrme effective interactions. We compare two different mechanisms of phase separation for low-density matter: equilibrium and spinodal decomposition. The isospin properties of the phases are deduced from the free-energy curvature, which contains information both on the average isospin content and on the system fluctuations. Some implications on experimentally accessible isospin observables are presented.
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