Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....71..283f&link_type=abstract
Astronomy and Astrophysics, vol. 71, no. 3, Jan. 1979, p. 283-288. NSF-NASA-supported research.
Astronomy and Astrophysics
Astrophysics
10
Astronomical Spectroscopy, Cosmic Plasma, Iron, Plasma Spectra, Spectral Line Width, Stark Effect, Electron Density (Concentration), Electron Energy, Error Analysis, Optical Thickness, Plasma Diagnostics
Scientific paper
Results are reported for a laboratory measurement of the electron broadening of the Fe I line at 5383 A as a function of electron density over the temperature range from 8000 to 12,000 K. A linear Z-pinch electrical discharge served as the spectroscopic light source in the experiment, and special precautions were taken to allow for optical-depth effects, which have been a major source of error in previous investigations. The results obtained include a Stark-broadening constant of 0.106 + or - 0.004 x 10 to the -16th A-cu cm at a mean temperature of 9500 K, an estimated Stark width/electron-broadened width ratio of 1.09 + or - 0.02, and a normalized electron-broadened width of 0.097 + or - 0.004 x 10 to the 16th A-cu cm. Comparison of the last result with a calculated value and with a previous measurement indicates that the present measurement is approximately 38% larger than the value measured earlier.
Cooper Joshua
Freudenstein S.
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