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Stark widths and shifts of some Xe II lines belonging to the supermultiplets with upper levels (3P1)6p were measured using a pulsed discharge lamp. Plasma parameters, i.e. electron density and temperature, in this experiment were in the range from 0.2 to 1.4×1023 m-3 and from 18000 to 23000 K, respectively. Lines obtained by transitions from levels (3P1)6p show some strong intra-supermultiplet irregularities in their Stark widths and shifts. These results and the measurements obtained in previous works were used here to analyse the main irregularities that can appear in the case of Xe II. This study may be very useful for obtaining Stark parameters of non-measured lines, using the known parameters of other lines belonging to similar transitions [1,2]. [ABSTRACT FROM AUTHOR]

Stark widths and shifts of 7 Ne II spectral lines in the multiplet (3P)3p(4P°)-(3P)3d(4D) have been measured in a low-pressure pulsed arc plasma. The maximal electron density and temperature was 2×l023m-3 and 43000K respectively. The parameters measurements show clear regularities than can be used for predicting other parameters with precision. [ABSTRACT FROM AUTHOR]

A set of experimental Stark width and shift parameters of visible singly ionized silicon spectral lines is reported. Measurements have been made on a pulsed plasma generated in a linear discharge lamp filled with a mixture of silane and helium. Electron density and temperature in this plasma range from 0.2 to 0.9 x 10[sup 23] m[sup -3] and from 16 000 K to 20 000 K, respectively. The electron density has been simultaneously determined by two-wavelength interferometry and from the Stark broadening of the He I 501.6 nm, He I 728.1 nm and Hα lines. The temperature has been simultaneously determined from a Boltzmann-plot of He I lines, from the absolute emission of He I lines, and from a Boltzmann-plot of Si II lines. Dependencies of the measured Stark parameters on electron density and temperature have been investigated. [ABSTRACT FROM AUTHOR]