Electric Microfield Distributions in Alkali Plasmas with Account of the Ion Structure in a Moderately Coupled Approximation
✍ Scribed by S. P. Sadykova; W. Ebeling; I. M. Sokolov
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- English
- Weight
- 302 KB
- Volume
- 51
- Category
- Article
- ISSN
- 0005-8025
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✦ Synopsis
The electric microfield distributions (EMD) have been calculated at the location of an ion for Alkali plasmas (Li + , Na + , K + , Cs + ) using a coupling parameter integration technique originally developed by Ortner et al. for point-like (structureless) ions [1]. EMD are studied in a frame of the Hellmann-Gurskii-Krasko (HGK) pseudopotential model, taking into account the quantum-mechanical effects and the ion shell structure [2]. For determination of the radial distribution function the screened HGK pseudopotential in a moderately coupled approximation, based on a chain of Bogoljubow equations for the equilibrium distribution functions [3], taking into account not only the quantum-mechanical effects, the ion shell structure but screening field effects has been used [4]. The new expressions for the screened HGK potential have been derived. At the derivation the electron-electron corrected Kelbg micropotential instead of earlier applied Deutsch potential has been used. The results obtained for the EMDs in the Hellmann-Gurskii-Krasko moderately coupled approximation for a moderately coupled plasma in a framework of the Ortner model show a considerable improvement of the results obtained in the Debye screening approximation.