Aachen PK 2003 – scientific programme

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P: Plasmaphysik

P 4: Poster I

P 4.25: Poster

Monday, March 17, 2003, 17:45–19:15, Foyer

Comparison of the Doppler-broadened line profiles of the first Balmer line of Hydrogen and Deuterium at moderate static electric fields — •Volkmar Helbig, Daniel Esch, Sandra Herzog, and Li Zhou — Institut für Experimentelle und Angewandte Physik, Universität Kiel, D 24098 Kiel

Optogalvanic spectra of the Doppler-broadened line profiles of Balmer alpha have been obtained in the cathode fall of a low pressure gas discharge in order to determine the local electric field strength by comparison with calculated Stark-profiles. Small but significant differences between the experimental and the theoretical profiles caused us to repeat the calculations with a second computer code to check the consistency of the respective results and to repeat the measurements with Deuterium instead of Hydrogen to look for a possible influence of the hyperfine-structure.