Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2007-02-27
Phys.Lett.B650:348-353,2007
Physics
Nuclear Physics
Nuclear Theory
6 pages, 4 figures, revised version, to appear in PLB
Scientific paper
10.1016/j.physletb.2007.05.035
The liquid-gas phase transition in hot neutron-rich nuclear matter is investigated within a self-consistent thermal model using an isospin and momentum dependent interaction (MDI) constrained by the isospin diffusion data in heavy-ion collisions, a momentum-independent interaction (MID), and an isoscalar momentum-dependent interaction (eMDYI). The boundary of the phase-coexistence region is shown to be sensitive to the density dependence of the nuclear symmetry energy with a softer symmetry energy giving a higher critical pressure and a larger area of phase-coexistence region. Compared with the momentum-independent MID interaction, the isospin and momentum-dependent MDI interaction is found to increase the critical pressure and enlarge the area of phase-coexistence region. For the isoscalar momentum-dependent eMDYI interaction, a limiting pressure above which the liquid-gas phase transition cannot take place has been found and it is shown to be sensitive to the stiffness of the symmetry energy.
Chen Lie-Wen
Li Bao-An
Ma Hong-Ru
Xu Jun
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