@article {983,
	title = {Neutral particle collisional relaxation of suprathermal distributions in aeronomy},
	journal = {Planetary and Space Science},
	volume = {52},
	number = {10},
	year = {2004},
	note = {ISI Document Delivery No.: 858UKTimes Cited: 3Cited Reference Count: 46},
	month = {Aug},
	pages = {915-922},
	type = {Article},
	abstract = {There are numerous situations in laboratory experiments and in atmospheric science that are characterized by distributions of energetic neutral species with extended high-energy tails. This paper provides a detailed analysis of the relaxation of such isotropic nonequilibrium distributions of neutral species. We consider a minor constituent, referred to as the test-particle dilutely dispersed in a second component that acts as a heat bath at equilibrium. A hard sphere cross section is assumed for the collisions of the test particles and the heat bath particles, and collisions between test particles are not included in the analysis. We study the approach to equilibrium with a finite difference method of solution of the Boltzmann equation. The solution of the Boltzmann equation is also presented as an expansion in the eigenfunctions of the Boltzmann collision operator. The main objective of the paper is the calculation of the energy-dependent relaxation times for the distribution function. It is anticipated that these relaxation times will not exhibit a strong energy dependence owing to the energy-independent hard sphere cross section. This relaxation behaviour is important in the characterization of nonthermal populations of energetic atoms in aeronomy. The results are compared with a similar analysis for Coulomb collisions described in the preceeding paper. (C) 2004 Elsevier Ltd. All rights reserved.},
	keywords = {BINARY GASES, Boltzmann equation, CHARGE-EXCHANGE, distribution functions, ENERGY-TRANSFER, FAST NITROGEN-ATOMS, FOKKER-PLANCK EQUATION, HYDROGEN, KINETIC-THEORY, MARS, O(P-3) ATOMS, OXYGEN-ATOMS, relaxation times, suprathermal populations},
	isbn = {0032-0633},
	url = {<Go to ISI>://000224217300003},
	author = {Shizgal, B. D.}
}
@inbook {5198,
	title = {Hot oxygen in the exosphere of Venus},
	booktitle = {Rarefied Gas Dynamics},
	series = {Aip Conference Proceedings},
	volume = {585},
	year = {2001},
	note = {ISI Document Delivery No.: BT38RTimes Cited: 1Cited Reference Count: 35Proceedings Paper22nd International Symposium on Rarefied Gas DynamicsJUL 09-14, 2000SYDNEY, AUSTRALIASandia Natl Labs, AFOSR/AOARD, ONR IFO Asia, Far E, DLR, USA Res Off, GAB Consulting Pty Ltd, Telstra2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA},
	pages = {119-126},
	publisher = {Amer Inst Physics},
	organization = {Amer Inst Physics},
	address = {Melville},
	abstract = {It has now been firmly established from both theoretical calculations and observations, that the exospheres of the terrestrial planets have extended coronas of translational energetic oxygen atoms. The current model generally accepted as the source of these hot atoms is the dissociative recombination of OZ, that is, O-2(+) + e(-) {\textendash}> O* + O* where the product O* atoms are translationally energetic. The determination of the extent of this population of superthermal atoms is an important endeavor. The present paper considers a simple model based on the Boltzmann equation for the energy and altitude dependence of the oxygen atom distribution function. The density and temperature distributions are determined with this distribution.},
	keywords = {ESCAPE, FRACTIONATION, GEOCORONA, HYDROGEN, KINETICS, MARS, MODEL, NITROGEN-ATOMS, O(P-3) ATOMS, UPPER-ATMOSPHERE},
	isbn = {0094-243X0-7354-0025-3},
	url = {<Go to ISI>://000172834300017},
	author = {Shizgal, B. D.},
	editor = {Bartel, T. J. and Gallis, M. A.}
}
@article {4665,
	title = {Escape of H and D from Mars and Venus by energization with hot oxygen},
	journal = {Journal of Geophysical Research-Space Physics},
	volume = {104},
	number = {A7},
	year = {1999},
	note = {ISI Document Delivery No.: 211WWTimes Cited: 12Cited Reference Count: 51},
	month = {Jul},
	pages = {14833-14846},
	type = {Article},
	abstract = {A kinetic theory collisional production model is used to determine the product velocity distributions of H and D resulting from collisional energy transfer with hot oxygen. The energetic oxygen atoms are the products of the dissociative recombination of O-2(+). Quantum mechanical cross sections for O-H and O-D collisions are used to determine the production distributions. The distributions of the particles entering a collision are assumed to be Maxwellian functions. The fraction of atoms with speeds above the escape speed is determined for Venus and Mars. For Venus, available density and temperature profiles are used to obtain estimates of the H and D escape fluxes and fractionation ratios.},
	keywords = {CHARGE-EXCHANGE, dissociative recombination, ENERGY-TRANSFER, FRACTIONATION, HYDROGEN, NITROGEN-ATOMS, O(P-3) ATOMS, REACTIVE SYSTEMS, THERMOSPHERE, UPPER-ATMOSPHERE},
	isbn = {0148-0227},
	url = {<Go to ISI>://000081185700036},
	author = {Shizgal, B. D.}
}
