J. Phys. IV France 10 (2000) Pr5-501-Pr5-504
Hydrogen lines in correlated plasmasC. Stehlé1, J.M. Caillol2, A. Escarguel3 and D. Gilles4
1 DASGAL, UMR 8633 du CNRS, 5 place J. Janssen, 92195 Meudon, France
2 MAPMO, UMR 6628, Université d'Orléans, BP. 6759, 45067 Orléans cedex 2, France
3 LOA, Université de Toulon, BP. 132, 83957 Lagarde cedex, France
4 Commissariat à l'Énergie Atomique, BP. 12, 91680 Bruyères-le-Châtel, France
Hydrogen line shapes broadened by Stark effects are calculated for a dense hydrogen plasma created by a Nd:YAG laser focussed into liquid water. The electronic density and temperature deduced from the experiment allow to use a Debye Hückel model for the interaction potential between the plasmas ions screened by the electrons. The Stark broadened line shapes, obtained in the frame of the Model Microfield Method, both for the electronic and ionic contributions, are based upon accurate Monte Carlo hydrogen field distributions functions, calculated on a neutral point together for the electrons (OCP) and for the ions (screened Coulombic field). The theoretical description allows to cover a wide range of thermodynamical conditions and to predict the emissivity (and opacity)of astrophysical and laboratory plasmas.
© EDP Sciences 2000