Abstract:
Stark broadening measurements and calculations of the Paschen γ spectral line of hydrogen ( λ = 1.094[: MU :] m) are reported. Investigations have been performed at plasma electron densities between 1.4×10 15 cm -3 and 3.7×10 15 cm -3. As the light source a wall-stabilized arc operated in a helium-hydrogen gas mixture at atmospheric pressure has been applied. The radiation of the plasma emitted from nearly homogeneous plasma layers in end-on direction, was measured with the use of a grating spectrometer equipped with a charge coupled device (CCD) detector. The radiance calibration was carried out against light outputs originating from a tungsten strip radiation standard. The measured FWHM are compared with results of our calculations based on computer simulation techniques (full computer simulation method -- FCSM). Our broadening data are also compared with results of other theoretical approaches (MM-method, quasi-static approximation) and with experimental data obtained at electron densities about one order of magnitude larger than ours.
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Received 21 January 2003 Published online 24 April 2003
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Wujec, T., Jazgara, A., Halenka, J. et al. Stark broadening of the hydrogen Paschen γ transition at electron densities of the order of cm . Eur. Phys. J. D 23, 405–408 (2003). https://doi.org/10.1140/epjd/e2003-00084-x
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DOI: https://doi.org/10.1140/epjd/e2003-00084-x