Surface-induced luminescence in a high-velocity rarefied atomic oxygen flow regime

Details Surface-induced luminescence in a high-velocity rarefied atomic oxygen flow regime Surface-induced luminescence in a high-velocity rarefied atomic oxygen flow regime

May 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995jgr...100.7821g&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 100, no. A5, p. 7821-7828

Physics

1

Atomic Beams, Gas Flow, Luminescence, Luminous Intensity, Oxygen Atoms, Surface Reactions, Flow Velocity, High Speed, Spacecraft Glow, Spectra

Scientific paper

A comprehensive investigation of surface-induced luminescence has been carried out, using a beam of fast (1.5 to 3.3 km/s) atomic oxygen and a painted aluminum target over which NO is effused. Experimental measurements of luminescence intensity as a function of beam fluxes, distance off the surface, and luminescence spectra lead to the conclusion of a surface-mediated O + NO yields NO2 reaction with supporting evidence for a multistep mechanism. Calibration of gas fluxes and luminescence intensity provides an overall rate coefficient (ln (k(sub 1)(sq cm s)) = -40(+2, -1.5)) which was not found to be sensitive to beam energy over the range investigated. Comparison of laboratory results with spacecraft glow indicates similar trends in both phenomena.

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