The mechanism of supernova explosion and properties of neutron stars are uniquely determined by the equation of state of neutron-rich matter. Using a phenomenological equation of state within a thermal model, we study thermodynamic properties of neutron-rich matter. In particular, we investigate chemical (diffusive) and mechanical (isothermal) instabilities of neutron-rich matter and their dependence on the nuclear equation of state. Both instabilities are found to be heavily dependent upon the isospin asymmetry, temperature, and density of neutron-rich matter. We show that the boundary of the chemical instability extends farther out into the density-isospin symmetry plane than that of the mechanical instability. Results of this study provide a useful guide to current experiments exploring properties of neutron-rich matter.
Tilley, Matt and Li, Bao-An
"Thermodynamic Properties of Neutron-Rich Matter,"
Journal of the Arkansas Academy of Science: Vol. 55
, Article 20.
Available at: http://scholarworks.uark.edu/jaas/vol55/iss1/20