2009/09/14 by Lie-Wen Chen
Earth and Planetary Sciences · Physics and Astronomy · #High-pressure geophysics and materials #Nuclear physics research studies #Pulsars and Gravitational Waves Research #nucl-th
paper · pdf · doi:10.1007/s11433-009-0200-4
published as Sci.China G52:1494-1505,2009 · 9 pages, 4 figures, contribution to Special Topic on Large-Scale Scientific Facilities (LSSF) in Science in China Series G: Physics, Mechanics & Astronomy
openalex publication_date 2009/09/14 · arxiv created 2009/10/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29
A phenomenological momentum-independent (MID) model is constructed to describe the equation of state (EOS) for isospin asymmetric nuclear matter, especially the density dependence of the nuclear symmetry energy E_\text\textrmsym(ρ). This model can reasonably describe the general properties of the EOS for symmetric nuclear matter and the symmetry energy predicted by both the sophisticated isospin and momentum dependent MDI model and the Skyrme-Hartree-Fock approach. We find that there exists a nicely linear correlation between Ksym and L as well as between J0/K0 and K0, where L and Ksym represent, respectively, the slope and curvature parameters of the symmetry energy at the normal nuclear density ρ0 while K0 and J0 are, respectively, the incompressibility and the third-order derivative parameter of symmetric nuclear matter at ρ0. These correlations together with the empirical constraints on K0, L and E_\text\textrmsym(ρ0) lead to an estimation of -477 MeV ≤ Ksat,2≤ -241 MeV for the second-order isospin asymmetry expansion coefficient for the incompressibility of asymmetric nuclear matter at the saturation point.