Nuclear condensation and symmetry energy of dilute nuclear matter: an S-matrix approach

Details Nuclear condensation and symmetry energy of dilute nuclear matter: an S-matrix approach Nuclear condensation and symmetry energy of dilute nuclear matter: an S-matrix approach

2008-10-15

arxiv.org/abs/0810.2615v2

Phys.Rev.C78:065204,2008

Physics

Nuclear Physics

Nuclear Theory

8 pages, 6 figures. PRC (in press)

Scientific paper

10.1103/PhysRevC.78.065204

Based on the general analysis of the grand canonical partition function in the S-matrix framework, the calculated results on symmetry energy, free energy and entropy of dilute warm nuclear matter are presented. At a given temperature and density, the symmetry energy or symmetry free energy of the clusterized nuclear matter in the S-matrix formulation deviates, particularly at low temperature and relatively higher density, in a subtle way, from the linear dependence on the square of the isospin asymmetry parameter $X=(\rho_n-\rho_p)/(\rho_n+\rho_p)$, contrary to those obtained for homogeneous nucleonic matter. The symmetry coefficients, in the conventional definition, can then be even negative. The symmetry entropy similarly shows a very different behavior.

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