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Isoscaling as a measure of symmetry energy in the lattice gas model

, : Isoscaling as a measure of symmetry energy in the lattice gas model. Physical Review Letters 102(14): 142503-142503

The energetic properties of nuclear clusters inside a low-density, finite-temperature medium are studied with a lattice gas model including isospin dependence and Coulomb forces. Important deviations are observed with respect to the Fisher approximation of an ideal gas of noninteracting clusters, but a simple modified energy-density functional can still describe the global energetics. The multifragmentation regime is dominated by combinatorial effects, but the isoscaling of the largest fragment appears to be a promising observable for the experimental measurement of the symmetry energy.


PMID: 19392432

DOI: 10.1103/PhysRevLett.102.142503

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