Eur. Phys. J. D 23, 405-408 (2003)
https://doi.org/10.1140/epjd/e2003-00084-x

Stark broadening of the hydrogen Paschen γ transition at electron densities of the order of 10¹⁵ cm^-3

Institute of Physics, Opole University, ul. Oleska 48, 45-052 Opole, Poland

Corresponding author: ^a wujec@uni.opole.pl

Received: 21 January 2003
Published online: 24 April 2003

Abstract

Stark broadening measurements and calculations of the Paschen γ spectral line of hydrogen () are reported. Investigations have been performed at plasma electron densities between and . 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.