CO2 and CO electron vibrational cooling rates

Details CO2 and CO electron vibrational cooling rates CO2 and CO electron vibrational cooling rates

Nov 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.6705p&link_type=abstract

Journal of Geophysical Research, vol. 84, Nov. 1, 1979, p. 6705-6708.

Physics

Atomic Physics

1

Carbon Dioxide, Carbon Monoxide, Electron Energy, Ionospheric Temperature, Quenching (Atomic Physics), Venus Atmosphere, Atmospheric Models, Gas Temperature, Molecular Relaxation, Planetary Ionospheres, Relaxation Time, Temperature Dependence

Scientific paper

Electron cooling rates for electron vibrational excitation of CO2 and CO and rotational excitation of CO are calculated. Results of the calculation are expressed as closed form analytic relations that are both convenient for numerical calculations and valid over a wide range of electron and neutral temperatures. It is found that the cooling rates and their temperature dependences differ significantly from other calculations. For CO2, these differences are related mainly to the assumptions about the approach to equilibrium and not to the actual cross-section choices. For electron temperatures below 1000 K and gas temperatures near 300 K (representative of conditions in the Venus atmosphere, where collisional cooling of the electrons dominates), the CO2 cooling rate is as much as an order of magnitude larger than previously considered in ionospheric models.

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