Differential scattering cross sections for collisions of 0.5-, 1.5-, and 5.0-keV helium atoms with He, H2, N2, and O2

Details Differential scattering cross sections for collisions of 0.5-, 1.5-, and 5.0-keV helium atoms with He, H2, N2, and O2 Differential scattering cross sections for collisions of 0.5-, 1.5-, and 5.0-keV helium atoms with He, H2, N2, and O2

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....9011045n&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 90, Nov. 1, 1985, p. 11,045-11,054. Research supported by the Robert A. W

Other

21

Atmospheric Models, Atomic Collisions, Diatomic Gases, Helium Atoms, Molecular Collisions, Scattering Cross Sections, Elastic Scattering, Hydrogen, Inelastic Scattering, Kinetic Energy, Measuring Instruments, Nitrogen, Oxygen, Tables (Data)

Scientific paper

This paper reports the first results of an experimental program established to provide cross section data for use in modeling various atmospheric processes. Absolute cross sections, differential in the scattering angle, have been measured for collisions of 0.5-, 1.5-, and 5.0-keV helium atoms with He, H2, N2, and O2 at laboratory scattering angles between 0.1 deg and 5 deg. The results are the sums of cross sections for elastic and inelastic scattering of helium atoms; charged collision products are not detected. Integration of the differential cross section data yields integral cross sections consistent with measurements by other workers. The apparatus employs a position-sensitive detector for both primary and scattered particles and uses a short target cell with a large exit aperture to ensure a simple and well-defined apparatus geometry.

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