Corrections to linear mixing in binary ionic mixtures and plasma screening at zero separation

Abstract

Using the results of extensive Monte Carlo simulations we discuss corrections to the linear mixing rule in strongly coupled binary ionic mixtures. We analyze the plasma screening function at zero separation, H_{jk}(0), for two ions (of types j=1,2 and k=1,2) in a strongly coupled binary mixture. The function H_{jk}(0) is estimated by two methods: (1) from the difference of Helmholtz Coulomb free energies at large and zero separations; (2) by fitting the Widom expansion of H_{jk}(x) in powers of interionic distance x to Monte Carlo data on the radial pair distribution function g_{jk}(x). These methods are shown to be in good agreement. For illustration, we analyze the plasma screening enhancement of nuclear burning rates in dense stellar matter.

4 pages, 2 figures, pre-peer reviewed version of the article accepted for publication in Contrib. Plasma Phys. (2009). The results can be applied to plasma screening enhancement of nuclear burning rates in dense stellar matter

References in corpus (4)

• Coulomb tunneling for fusion reactions in dense matter: Path integral Monte Carlo versus mean field
• Equation of state of classical Coulomb plasma mixtures
• Addendum to "Equation of state of classical Coulomb plasma mixtures"
• Nuclear fusion reaction rates for strongly coupled ionic mixtures

Cited by in corpus (5)

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• Thermonuclear fusion in dense stars: Electron screening, conductive cooling, and magnetic field effects
• Electron screening effect on stellar thermonuclear fusion
• Screening of fusion reactions from the principle of detailed balance and application to the $pep$ reaction
• Plasma screening of nuclear fusion reactions in liquid layers of compact degenerate stars: a first-principle study