Hannover 2016 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 25: Poster Session- Theory and Modelling

P 25.4: Poster

Donnerstag, 3. März 2016, 16:30–19:00, Empore Lichthof

Path integral approach to Stark-broadening of Lyman lines from hydrogen plasmas — •Nacira Bedida, Heidi Reinholz, and Gerd Röpke — University of Rostock, Rostock, Germany

New results for Lyman lines from hydrogen plasmas are presented using the path integral method. Within the path integral approach [1], the time dependent dipole autocorrelation function is obtained in terms of Feynman propagators. Knowing the propagator in comparison to the unperturbed emitter, it is possible to develop a perturbative series. Finally, we obtain a compact formula for the intensity of Lyman lines taking an appropriate ionic micro-field distribution. Good agreement with results obtained within a quantum statistical approach to line profiles [2,3] is found, in particular at high densities and temperatures.

[1] N. Bedida et al. Contrib. Plasma Phys. 54, No 9, 783- 790 (2014); [2] S. Guenter, Habilitation thesis, Rostock University, Germany, 1995; [3] S. Lorenzen et al., Journal of Physics: Conference Series 397, 012021 (2012).