Excitation of oxygen permitted line emissions by SF6 injection into the F region

Details Excitation of oxygen permitted line emissions by SF6 injection into the F region Excitation of oxygen permitted line emissions by SF6 injection into the F region

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91.8937b&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 91, Aug. 1, 1986, p. 8937-8946. DOE-sponsored research.

Physics

16

Airglow, Atomic Excitations, F Region, Line Spectra, Oxygen Atoms, Sulfur Fluorides, Atmospheric Models, Electron Attachment, Injection, International Magnetospheric Study, Temperature Dependence

Scientific paper

The use of SF6 releases to excite the airglow from atomic oxygen in the ionosphere is demonstrated by experiment and by theory. Enhanced 777.4-nm emissions from O(5P) states were measured during the AFGL-sponsored Ionospheric Modification Studies campaign at Wallops Island, VA. For this rocket campaign, 8 x 10 to the 25th molecules of SF6 were released at 350-km altitude into the midnight ionosphere on November 9, 1983. The 777.4-nm airglow increased by over 150 R. The temporal evolution of the airglow is simulated using an ion chemistry model involving six positive and negative ion species and 16 reactions. The model indicates that substantial enhancements in 844.6 nm and 135.6 nm will be triggered by SF6 injections into the ionosphere. The model also demonstrates that the intensity of the 777.4-nm line is strongly dependent on the temperature of the neutral atmosphere.

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