Charge transfer and momentum exchange in exospheric D-H[sup +] and H-D[sup +] collisions

Journal Article · Mon Feb 01 04:00:00 EST 1993 · Journal of Geophysical Research; (United States)

DOI:https://doi.org/10.1029/92JA02346· OSTI ID:7060994

Hodges, Jr, R R; Breig, E L ^[1]

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1. Univ. of Texas, Dallas (United States)

Mechanisms that control the escape of deuterium from planetary exospheres include the acceleration of D[sup +] 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[sup +] and of D with H[sup +] for ionosphere-exosphere collision energies below 10 eV. These data are used to derive temperature dependent rate coefficients for the charge transfer branches of these interactions, and to deteermine the effects of ion-neutral temperature differences on the rate of generation of suprathermal D through charge transfer and elastic scatter. 22 refs., 7 figs., 2 tabs.

• OSTI ID: 7060994
• Journal Information: Journal of Geophysical Research; (United States), Journal Name: Journal of Geophysical Research; (United States) Vol. 98:A2; ISSN JGREA2; ISSN 0148-0227
• Country of Publication: United States
• Language: English

Related Subjects

661320* -- Auroral
Ionospheric
& Magnetospheric Phenomena-- (1992-)
664300 -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ACCELERATION
ATOM COLLISIONS
ATOMS
CATIONS
CHARGE EXCHANGE
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
DEUTERIUM
DEUTERIUM IONS
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
EARTH ATMOSPHERE
ELASTIC SCATTERING
ELEMENTS
EXOSPHERE
HYDROGEN
HYDROGEN IONS
HYDROGEN IONS 1 PLUS
HYDROGEN ISOTOPES
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
ISOTOPES
LIGHT NUCLEI
NONMETALS
NUCLEI
ODD-ODD NUCLEI
PARTICLE LOSSES
PRODUCTION
SCATTERING
STABLE ISOTOPES
VELOCITY