Experimental Stark widths and shifts of triply ionized sulfur spectral lines

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Lines: Profiles, Atomic Data

Scientific paper

Stark widths and shifts of two prominent triply ionized sulfur (S IV) ultraviolet spectral lines (309.727 nm and 311.761 nm) in the 4s 2S-4p 2P0 transition have been measured in a linear, low-pressure, pulsed arc discharge created in a SF_6 plasma at 33 600 K electron temperature and at 2.8 x 1023 m -3 electron density. Presented Stark shifts are the first measurement of the line shift in the S IV spectrum. Obtained broadening parameters have been compared to the available experimental and theoretical data. The transition probability ratio of the mentioned S IV spectral lines is also obtained.

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