Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1996-08-13
Phys.Lett. B392 (1997) 7-12
Physics
Nuclear Physics
Nuclear Theory
13 pages LaTex, 6 figures available on request at kuo@nuclear.physics.sunysb.edu
Scientific paper
10.1016/S0370-2693(96)01509-2
An isospin lattice-gas model, which is a spin-1 Ising model, is employed to investigate the liquid-gas phase transition in asymmetric nuclear matter. We consider nuclear matter as a lattice where each lattice site can be either empty or occupied by a proton or a neutron, with a nearest-neighbor interaction among the nucleons. With the Bragg-Williams mean field approximation, we calculate various thermodynamic properties of nuclear matter for different densities and different proton-neutron asymmetry parameter $s$. Our model exhibits liquid-gas phase transition below a critical temperature $T_c$, and predicts a monotonic decreasing of $T_c$ as the magnitude of $s$ is increased. The dependence of the nuclear matter isotherms on the asymmetry parameter $s$ is discussed.
Kuo Thomas T. S.
Ray Saibal
Shamanna J.
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