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Charge transfer and momentum exchange in exospheric D-H(+) and H-D(+) collisionsMechanisms 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.
Document ID
19930040608
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Hodges, R. R., Jr.
(NASA Headquarters Washington, DC United States)
Breig, E. L.
(Univ. of Texas at Dallas Richardson, United States)
Date Acquired
August 16, 2013
Publication Date
February 1, 1993
Publication Information
Publication: Journal of Geophysical Research
Volume: 98
Issue: A2
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
93A24605
Funding Number(s)
CONTRACT_GRANT: NAGW-2432
Distribution Limits
Public
Copyright
Other

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