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Stark widths of three Ar I spectral lines have been measured in an Ar + He plasma at 13 000 K electron temperature and compared with existing experimental values. The Stark broadening parameters of these three experimentally investigated lines have been calculated within the semiclassical perturbation approach as a function of temperature and compared with the experimental data.

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Stark width and shift measurements of eight S II and one S III spectral line {of4s-4p, 4s'-4p', and 4p-4d transition arrays) have been performed for the electron density range 6.70X 10 -2.08 X 10 ' m ' and for an electron temperature range 27000-40000 K. Stark parameters of all these spectral lines, belonging mostly to higher multiplets, were measured in a linear low-pressure pulsed arc operating in SO2. The obtained Stark width data were compared with the values calculated on the basis of various theoretical approaches and good agreement has been found. The existence of Stark width dependence on the upper-level ionization potential, for S II spectral lines belonging to the 4p-4d transition array, has also been proved. 422379