Intensity ratio and center wavelengths of /O II/ /7320-7330 A/ line emissions

Details Intensity ratio and center wavelengths of /O II/ /7320-7330 A/ line emissions Intensity ratio and center wavelengths of /O II/ /7320-7330 A/ line emissions

Apr 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...229..432s&link_type=abstract

Astrophysical Journal, Part 1, vol. 229, Apr. 1, 1979, p. 432-438.

Astronomy and Astrophysics

Astrophysics

8

Auroral Spectroscopy, Earth Atmosphere, Emission Spectra, Line Spectra, Oxygen Spectra, Electron Energy, Hydroxyl Radicals, Infrared Spectra, Spectrophotometry, Transition Probabilities

Scientific paper

The intensity ratio and center wavelengths of O(+) lines at 7320 and 7330 A are measured during an aurora containing a large flux of low energy electrons, in which hydroxyl emission is negligible. Correcting for OH and N2 contributions to O(+) emissions yields an 7320 A/7330 A line intensity ratio of 1.55 + or - 0.05. Possible explanations of the 17 to 22% discrepancy between theoretical and experimental values of the ratio include errors in calculated transition probabilities and unexpected level populations. The center wavelength of the 7320 A O(+) (2P 1/2, 3/2 - 2D 5/2) doublet is found to be 7320.1 + or 0.2 A and that of the 7330 A O(+) (2P 1/2, 3/2 - 2D 3/2) doublet is 7330.2 + or - 0.2 A.

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