title: Isoscaling as a measure of symmetry energy in the lattice gas model.
abstract: 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.
authors.affiliation: LPC Caen, ENSICAEN, Université de Caen, CNRS/IN2P3, Caen, France.
authors.forename: G
authors.initials: G
authors.lastname: Lehaut
authors.forename: F
authors.initials: F
authors.lastname: Gulminelli
authors.forename: O
authors.initials: O
authors.lastname: Lopez