O+ bombardment of an O and O2 Thermosphere

Details O+ bombardment of an O and O2 Thermosphere O+ bombardment of an O and O2 Thermosphere

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000dps....32.1807m&link_type=abstract

American Astronomical Society, DPS Meeting #32, #18.07; Bulletin of the American Astronomical Society, Vol. 32, p.1026

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Scientific paper

Ejection of atoms and molecules from the atmosphere of Mars is caused by energetic O+ pickup-ion bombardment [Luhmann et al, 1992; Jakosky et al.,1994], a process referred to as atmospheric sputtering. This process also occurs on other bodies which have molecules at the exobase such as Europa and Titan. Using a Monte Carlo procedure we calculate the rate of ejection of particles from a model thermosphere composed of O and O2 which is bombarded by energetic O+. To allow for dissociation of O2, collisions between high energy O atoms and O2 molecules are treated using classical molecular dynamics with semi-empirical interaction potentials. O + O collisions are treated with the magic formula method of Zeigler et al.,1985. The effect of molecular binding on the atmospheric sputtering yield is examined.

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