Other
Scientific paper
Mar 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...405..798k&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 405, no. 2, p. 798-800.
Other
8
Electron Density (Concentration), Electron Transitions, Ferric Ions, Solar Flares, Solar Spectra, Ultraviolet Spectra, Emission Spectra, Extreme Ultraviolet Radiation, Line Spectra
Scientific paper
We have examined EUV spectra of solar flares and measured the intensities of the 324.97 A and 323.57 A emission lines relative to that of the Fe XV 3s3p 3P2-3p2 3P1 transition at 321.76 A. A comparison of these line ratios with theoretical predictions indicates that the Fe XV 3s3p 1P-3p2 1S transition is the line observed at 324.97 A, rather than the feature at 323.57 A as previously suggested. In addition, we show that the I(324.97 A)/I(321.76 A) intensity ratio is an excellent electron density diagnostic for the Fe XV emitting region of the solar atmosphere. The relative intensities of other Fe XV lines in the 290-330 A wavelength region of the S082A spectra are also analyzed and briefly discussed.
Conlon E. S.
Dufton Philip L.
Foster John V.
Keenan Francis P.
Kingston A. E.
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