Berlin 2005 – wissenschaftliches Programm

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P: Plasmaphysik

P 21: Poster: Plasma-Wand Wechselwirkung 2, Theorie 2, Dichte Plasmen 1, Schwerionen- und lasererzeugte Plasmen 2

P 21.14: Poster

Montag, 7. März 2005, 16:30–18:30, Poster HU

Monte Carlo results for the hydrogen Hugoniot — •Valeriy Bezkrovniy¹, Vladimir Filinov², Dietrich Kremp³, Michael Bonitz⁴, Manfred Schlanges¹, and Wolf Dietrich Kraeft¹ — ¹Universität Greifswald — ²Inst. High Energy Density, Moscow — ³Universität Rostock — ⁴Universität Kiel

We propose a theoretical Hugoniot obtained by combining results for the equation of state (EOS) from the Direct Path Integral Monte Carlo technique (DPIMC) and those from Reaction Ensemble Monte Carlo (REMC) simulations. The main idea of such proposal is due to the fact that DPMIC describes the EOS of hydrogen in a wide range of densities and temperatures including the region of partially ionized plasmas. For temperatures where the formation of molecules becomes dominant in the system DPIMC simulations become very cumbersome. For this region it is possible to use REMC simulations where bound states (molecules) are treated at Born-Oppenheimer level using a binding potential calculated by Kolos and Wolniewicz. The remaining interaction is then only taken to be the scattering between neutral particles which is treated classically applying effective potentials. The resulting Hugoniot is located between the experimental values of Knudson et al. and Collins et al..