Mathematics – Probability
Scientific paper
Feb 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993p%26ss...41...91g&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 41, no. 2, p. 91-104.
Mathematics
Probability
15
Atmospheric Chemistry, Deuterium, Hydrogen, Outgassing, Venus Atmosphere, Neutral Gases, Probability Distribution Functions, Thermosphere, Venus, Fractionation, Hydrogen, Deuterium, Collisions, Ejection, Flux, Parameters, Ionosphere, Temperature, Oxygen, Reactions, Scattering, Thermal Effects, Dissociation, Neutral Gas, Distribution, Gases, Isotopic Ratios
Scientific paper
The collisional ejection process for hydrogen on Venus is reanalyzed. Improved values for the efficiency of H and D escape as a function of the ionospheric temperature are reported. It is proposed that the reduction of the hydrogen flux for collisional ejection be reduced from 8 to 3.5 x 10 exp 6/sq cm/s, and a revised D/H fractional factor of 0.47 due to collisional ejection is suggested. The resulting deuterium flux is 3.1 x 10 exp 4/sq cm/s, roughly six times the flux due to charge exchange, making collisional ejection the dominant escape mechanism for deuterium on Venus.
Gurwell Mark A.
Yung Yuk L.
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