Charge transfer and momentum exchange in exospheric D-H(+) and H-D(+) collisions

Details Charge transfer and momentum exchange in exospheric D-H(+) and H-D(+) collisions Charge transfer and momentum exchange in exospheric D-H(+) and H-D(+) collisions

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....98.1581h&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. A2, p. 1581-1588.

Physics

16

Charge Transfer, Exosphere, Ion Atom Interactions, Momentum Transfer, Venus Atmosphere, Deuterium, Elastic Scattering, Hydrogen, Reaction Kinetics, Three Body Problem

Scientific paper

Mechanisms that control the escape of deuterium from planetary exospheres include the acceleration of D(+) in the polar wind, and the production of suprathermal D atoms through nonthermal collisions. In this paper we examine the effects of neutral-ion interactions involving deuterium and hydrogen on the velocity distribution of neutral D. A two-center scattering approximation is used as the basis for calculations of the differential cross sections for charge transfer and elastic scatter in collision of H with D(+) and of D with H(+) for ionosphere-exosphere collision energies below 10 e V. These data are used to derive temperature dependent rate coefficients for the charge transfer branches of these interactions, and to determine the effects of ion-neutral temperature differences on the rate of generation of suprathermal D through charge transfer and elastic scatter.

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