Possible contribution of radiation from the 2s2p/4/ 2P level of O II in dayglow measurements of the He I line at 584 A

Details Possible contribution of radiation from the 2s2p/4/ 2P level of O II in dayglow measurements of the He I line at 584 A Possible contribution of radiation from the 2s2p/4/ 2P level of O II in dayglow measurements of the He I line at 584 A

Feb 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977p%26ss...25..193d&link_type=abstract

Planetary and Space Science, vol. 25, Feb. 1977, p. 193-195.

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1

Dayglow, Helium, Oxygen Spectra, Ultraviolet Spectra, Earth Ionosphere, Ionization Cross Sections, Photoionization, Solar Flux

Scientific paper

Observations of the neutral helium dayglow at 584 A have been performed with broad-band devices that might be sensitive to other emissions. This note examines the possible contamination of such data by emissions from the 2s2p(4) 2P state of singly ionized oxygen. The O II dayglow is estimated for nearly optimum conditions, and it is shown that O II emissions at 537 and 581 A are quite sizeable in comparison with reported 584-A fluxes for heights of 100 to 400 km. The use of a rare-gas absorption-cell photometer is suggested as a means of eliminating possible errors in helium dayglow measurements.

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