An experimental estimate of the O/+/-O resonant charge transfer cross section, collision frequency, and energy transfer rate

Details An experimental estimate of the O/+/-O resonant charge transfer cross section, collision frequency, and energy transfer rate An experimental estimate of the O/+/-O resonant charge transfer cross section, collision frequency, and energy transfer rate

Mar 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.1144c&link_type=abstract

Journal of Geophysical Research, vol. 82, Mar. 1, 1977, p. 1144-1148.

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2

Charge Transfer, F Region, Oxygen Atoms, Oxygen Ions, Atmospheric Models, Collision Rates, Cross Sections, Energy Transfer, Incoherent Scattering

Scientific paper

The resonant-charge-transfer cross section dominates the interaction between neutral and ionized atomic oxygen at temperatures greater than several hundred degrees Kelvin. This cross section is of direct importance to F-region studies of ion diffusion, ion thermal balance, and neutral atmospheric winds and pressure gradients, since it determines collision frequencies and energy and momentum transfer rates. However, the uncertainty in this cross section is roughly 25-40%. Incoherent-scatter measurements allow determination of the product of the atomic oxygen concentration multiplied by the cross section. If present-day atmospheric models are accepted as statistically representative of F-region atomic oxygen concentrations experimental (aeronomical) data presented indicate that the resonant-charge-transfer cross section is about 1.3 times greater than the value presently in general use, though in excellent agreement with the only other available (laboratory) experimental value. This revised cross section has obvious implications for thermospheric studies.

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