Coulomb corrections to the equation of state for a weakly-coupled plasma

Details Coulomb corrections to the equation of state for a weakly-coupled plasma Coulomb corrections to the equation of state for a weakly-coupled plasma

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26a...364..157b&link_type=abstract

Astronomy and Astrophysics, v.364, p.157-164 (2000)

Astronomy and Astrophysics

Astrophysics

3

Equation Of State, Sun: General, Stars: Interiors

Scientific paper

Coulomb corrections to the equation of state of degenerate matter are usually described by Debye-Hückel theory; however, recent studies have considered modifications of thermodynamic quantities which are caused by the interactions of charged particles beyond the Debye-Hückel approximation. Based on the weakly-coupled plasma limit, the formulae for the physical properties of non-ideal effects on the equation of state are derived. The treatment of the non-ideal effects due to Coulomb coupling combines the results of quantum-statistic calculations for the electrons, N-body semianalytic theory for ions, and the extended Debye-Hückel theory with hard-core correction for the electron-ion interaction. The leading Coulomb correction not only can be applied to the weak-coupling region, but also preserves the well-known Debye-Hückel limit at Gamma << 1. We examine the Coulomb correction to the thermodynamic quantities of a weakly coupled and fully ionized plasma. The result reveals that the contribution is quite significant, and hence modifies the thermodynamic properties of the plasma substantially.

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