Physics
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001jgr...106.8197l&link_type=abstract
Journal of Geophysical Research, Volume 106, Issue A5, p. 8197-8204
Physics
8
Atmospheric Composition And Structure: Ion Chemistry Of The Atmosphere, Ionosphere: Ionosphere/Atmosphere Interactions, Ionosphere: Particle Precipitation, Magnetospheric Physics: Energetic Particles, Precipitating
Scientific paper
We report absolute differential cross sections for charge transfer scattering of 0.5-5 keV O+(4S) ground state and O+(2D,2P) metastable ions by atomic oxygen at angles between 0.04° and 3° in the laboratory frame. Absolute total charge transfer cross sections, derived from these measurements, are compared with previously published data. The measurements were made using a flowing gas target, which consisted of a mixture of atomic and molecular oxygen produced by passing O2 through a microwave discharge. The atomic oxygen cross sections were obtained by appropriate subtraction of the signal due to molecular oxygen from that due to the mixture of O and O2. These data are relevant to model calculations of energetic O+ precipitation into the upper atmosphere and to the diffusion of low-energy O+ ions in the ionosphere.
Lindsay Bruce G.
Sieglaff D. R.
Smith Anna K.
Stebbings R. F.
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