STARK BROADENING OF AI AND AII AT HIGH ELECTRON CONCENTRATION.
JOHNS HOPKINS UNIV BALTIMORE MD DEPT OF PHYSICS
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Stark-broadened profiles for several AI and AII lines were measured. These results were compared with Griems theoretical predictions. The shifts and widths observed for AI lines were less than predicted, but the difference did not exceed the combined theoretical and experimental uncertainties. However, the profiles observed were less symmetric than those predicted. A highly reproducible transient plasma generator was developed for this study. The characteristics of this source were investigated to some extent and the homogeneity along the line of sight was investigated in detail. The temperature of the plasma was determined from measurements of the absolute intensities of spectral lines of AI and AII. For calculation of this temperature, a single noniterative equation was derived. The range of validity of this equation was explored. Electron concentrations were also derived from measurements of absolute intensities. Some comments with regard to current argon transition probabilities are made. Author
- Atomic and Molecular Physics and Spectroscopy
- Plasma Physics and Magnetohydrodynamics