Kiro Miyazaki
Liquid-gas phase transition in the canonical ensemble of asymmetric nuclear matter
(240K, PDF)
ABSTRACT. New calculus of the liquid-gas phase transition is developed for the canonical ensemble of asymmetric nuclear matter. In contrast to the familiar geometrical construction, the pressure and the chemical potentials are determined for definite values of the baryon densities of proton and neutron and the temperature. Because the derivatives of chemical potentials by pressure have discontinuities at the ends of the phase transition, we conclude against the preceding works that the phase transition is the first order. Due to the field-dependent meson-nucleon coupling constants in our relativistic mean-field model of nuclear matter, the section of binodal surface has no critical point. The appearance of the retrograde condensation is also proved.