Abstract
The analysis of experimental Stark halfwidths of spectral lines of singly ionized oxygen and silicon and double ionized silicon is presented in this work. The considered spectral lines were emitted from plasma generated in an electromagnetically driven T-tube, with an electron temperature of 15,000 K and electron density of 1.45 × 1023 m−3. The obtained Stark halfwidths were compared to experimental values given by other authors. In addition, all experimental values were compared to theoretical values. These data are useful for diagnostics of laboratory and astrophysical plasmas as well as verifying theoretical models.
Highlights
[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26] and astrophysical plasmas [27,28,29,30,31,32,33]. Stark parameters of these spectral lines can be used for and astrophysical plasmas [27,28,29,30,31,32,33]. Stark parameters of these spectral lines can be used for plasma plasma diagnostics, as it can be seen in the references given above
Since the is produced in silicon a T-tube, which operates ofofshockwave propagation in aplasma glass tube, oxygen and appear in the plasmaon duethe to principle an ablation the glass propagation in a glass tube, oxygen and silicon appear in the plasma due to an ablation of the walls of the tube [35]
The shape of O II, Si II and Si III spectral lines emitted from the plasma is best described by a theoretical Voigt profile
Summary
Spectral lines of ionized oxygen and silicon are often present in spectra emitted from laboratory [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26]. New and reliable experimental diagnostics, as it can be seen in the references given above. The presence of O II, Si II and Si III spectral lines in our experiments was first observed in the spectra emitted from the T-tube while using pure helium as the working gas [34,35]. Oxygen and silicon occur in our plasma as impurities originating from the glass walls of the discharge vessel. Silicon occur in our plasma as impurities originating from the glass walls of the discharge vessel.
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