Lyman-alpha emission cross sections for low-energy H and H(+) collisions with N2 and O2

Details Lyman-alpha emission cross sections for low-energy H and H(+) collisions with N2 and O2 Lyman-alpha emission cross sections for low-energy H and H(+) collisions with N2 and O2

Feb 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93.1023v&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 93, Feb. 1, 1988, p. 1023-1027. NSF-supported research.

Physics

11

Atmospheric Physics, Emission Spectra, Lyman Alpha Radiation, Molecular Collisions, Particle Collisions, Hydrogen Ions, Nitrogen, Oxygen, Particle Energy, Positive Ions

Scientific paper

Absolute cross sections for emission of Lyman α radiation have been determined for low-energy H and H+ impact on N2 and O2 targets. Data were obtained for projectile energies between about 0.04 and 2.5 keV. Using previously measured cross sections for Balmer α and Balmer β emission, the authors were able to evaluate the cascade contributions to the measured Lyman α signals and to deduce the cross sections for both direct 2p state excitation and total Lyman α emission. The data are compared with other results for projectile energies below 10 keV, and the problems associated with the application of such cross-section data to proton auroral analyses are discussed.

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