Electron impact dissociative excitation of O2: 1. Kinetic energy distributions of fast oxygen atoms

Details Electron impact dissociative excitation of O2: 1. Kinetic energy distributions of fast oxygen atoms Electron impact dissociative excitation of O2: 1. Kinetic energy distributions of fast oxygen atoms

Nov 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jgre..108.5125m&link_type=abstract

Journal of Geophysical Research, Volume 108, Issue E11, pp. 11-1, CiteID 5125, DOI 10.1029/2000JE001422

Physics

3

Planetology: Solar System Objects: Instruments And Techniques, Planetology: Comets And Small Bodies: Radiation And Spectra, Atmospheric Composition And Structure: Airglow And Aurora, Planetology: Comets And Small Bodies: Atmospheres-Composition And Chemistry, Planetology: Solar System Objects: Jovian Satellites

Scientific paper

The kinetic energy distribution of oxygen atoms resulting from electron impact dissociation of O2 has been measured. A high-resolution vacuum ultraviolet spectrometer was employed for the measurement of the OI(115.2 nm, 130.4 nm, 135.6 nm) fine-structure emission line profiles at 35 eV and 100 eV electron impact energies. The deconvolved line profiles of atomic oxygen reveal the existence of a broad line profile (~30-40 mÅ full width at half maximum) produced from a combination of dissociative excitation and dissociative ionization excitation processes. The atomic oxygen kinetic energy distributions at 100 eV electron impact energy spans the energy range from 1 to 10 eV, with a peak value near 1 eV. The excitation functions of OI(115.2 nm, 130.4 nm, 135.6 nm) were measured in the vicinity of threshold, from 14 to 50 eV. The PACS classification is 34.80.Gs (electron scattering-molecular dissociation) and 33.50Dq (molecular spectra-fluorescence).

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