✦ LIBER ✦

Theoretical emission line ratios for Oviiin low-density plasmas

✍ Scribed by F. P. Keenan; S. S. Tayal; A. E. Kingston

Publisher: Springer
Year: 1984
Tongue: English
Weight: 243 KB
Volume: 92
Category: Article
ISSN: 0038-0938
DOI: 10.1007/bf00157236

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✦ Synopsis

New electron excitation rates for Ovxl calculated by Tayal and Kingston using the R-matrix method are used to determine theoretical emission line strengths. Values of the electron density sensitive ratio R (forbidden line to intercombination line) are found to be very similar to those deduced by other authors. However the temperature sensitive ratios G (intercombination plus forbidden lines to resonance line) are approximately 20% lower than the best previous estimates. The observed value of G for solar active regions (G = 1.0 + 0.1) predicts an electron temperature in the range 1.1 • 106 K < 1",.. < 1.8 x l06 K, which overlaps that of maximum O vu emissivity, T M = 1.8 x 106 K. In addition, the theoretical G versus T e curve is in excellent agreement with that observed for a Tokamak plasma.

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