Effective electron impact excitation cross sections for N2, O2, and O1

Details Effective electron impact excitation cross sections for N2, O2, and O1 Effective electron impact excitation cross sections for N2, O2, and O1

Aug 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81.4031h&link_type=abstract

Journal of Geophysical Research, vol. 81, Aug. 1, 1976, p. 4031-4034. National Research Council of Canada

Physics

Cross Sections, Electron Impact, Nitrogen, Oxygen Atoms, Electron Beams, Fluorescence, Molecular Gases, Molecular Ions, Spectral Bands

Scientific paper

Absolute effective excitation cross sections were obtained for electron beam-induced emissions in N2, O2, and O for beam energies of 0.6-3 keV. The experimental facility used consisted of an atomic oxygen production apparatus, a gas source assembly, a vacuum system, a high-energy electron beam source, and an electrooptical detection system. Fluorescence was produced by a beam of 600-3000 eV energy and 0-5 MA current passing through the free jet axis and was analyzed with a detector consisting of a scanning monochromator and a photomultiplier. The measured N2(+) 1N(0,1) band cross section was found to be in good agreement with recent data, with the exception of the results of Sheridan et al. (1971) and Nishimura (1968). The cross sections for the O II 4350-A and O II 4416-A emission in atomic oxygen were found to be 1.6 and 3.6 times larger, respectively, than those in molecular oxygen. For the emissions studied, the fluorescent signal intensities varied linearly with species concentration and beam current.

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