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Stark broadening of the hydrogen Paschen γ transition at electron densities of the order of cm

  • T. Wujec
  • A. Jazgara
  • J. Halenka
  • J. Musielok

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.

PACS. 52.70.Kz Optical (ultraviolet, visible, infrared) measurements – 32.70.Jz Line shapes, widths, and shifts 

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Copyright information

© EDP Sciences, Springer-Verlag, Società Italiana di Fisica 2003

Authors and Affiliations

  • T. Wujec
    • 1
  • A. Jazgara
    • 1
  • J. Halenka
    • 1
  • J. Musielok
    • 1
  1. 1.Institute of Physics, Opole University, ul. Oleska 48, 45-052 Opole, PolandPL

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