Berlin 2014 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 14: Poster Session - Theory and Modelling

P 14.16: Poster

Dienstag, 18. März 2014, 16:30–18:30, SPA Foyer

Cluster virial expansion for partially ionized plasmas — •Niels-Uwe Friedrich Bastian¹, Yultuz Omarbarkiyeva², Gerd Röpke¹, and Heidi Reinholz¹ — ¹INSTITUT FÜR PHYSIK | Universität Rostock, Universitätsplatz 3 | Rostock, Germany — ²SECTION OF PHYSICS | International IT University, Dzhandosov 8a | Almaty, Kazakhstan

The chemical picture serves as an intuitive concept to treat the low-density limit of many-particle systems forming clusters (bound states). Systematic quantum statistical approaches allow to combine the mass ac- tion law with mean-field concepts. Within a generalized Beth-Uhlenbeck approach, the quasi particle virial expansion and the suppression of correlations due to screening and Pauli blocking is formulated. This approach is generalized to include arbitrary clusters, where special attention must be paid to avoid inconsis- tencies such as double counting. The contribution of the continuum to the virial coefficients can be reduced considering separately excited states and quasiparticle energies. The cluster-virial expansion connects known benchmarks at low densities as well as at high densities. In detail the electron, proton and atom system is considered.