An investigation of the second negative system of O2(+) by electron impact

Details An investigation of the second negative system of O2(+) by electron impact An investigation of the second negative system of O2(+) by electron impact

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93.9893j&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 93, Sept. 1, 1988, p. 9893-9902. USAF-supported research.

Physics

13

Atmospheric Physics, Electron Impact, Emission Spectra, Molecular Spectra, Oxygen Ions, Auroral Spectroscopy, Beam Interactions, Franck-Condon Principle, Ion Beams, Optical Thickness, Ultraviolet Spectra

Scientific paper

Emission spectrum of O2 from 115 to 300 nm induced by electron impact at 200 eV was obtained using a crossed-beam configuration under optically thin conditions. The second negative system of O2(+) was observed in the range 186-300 nm. Model calculations were performed to derive the contribution made by the second negative system of O2(+) to auroral spectra in the same wavelength range. Observations of the spectral region from 140 to 185 nm, carried out to verify the report of Erdman and Zipf (1986) on the O or O(+) transitions showed no detectable O or O(+) transitions with a cross section upper limit of 10 to the -21 sq cm.

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