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High temperature transport properties of airA general computer code was developed to allow calculation of atom-atom and ion-atom transport collision integrals from accurate potential energy curves described by a set of discrete data points for a broad range of scattering conditions. This code is based upon semiclassical approximations that properly account for quantum mechanical behavior such as tunneling effects near a barrier maximum, resonance charge exchange, and nuclear symmetry effects. Transport collision integrals were determined for N-N, O-O, N(+)-N, and O(+)-O interactions from complete sets of accurate potential functions derived from combined experimental and ab initio structure calculations. For the O-O case, this includes results for excited states. The calculated values of the N(+)-N and O(+)-O resonance charge exchange cross section Q(ex) agree well with measurements from beam experiment that are available at high energies where the diffusion cross section Q(d) satisfies Q(d) approximately equal to 2Q(ex).
Document ID
19870055855
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Levin, E.
(NASA Ames Research Center Moffett Field, CA, United States)
Partridge, Harry
(NASA Ames Research Center Moffett Field, CA, United States)
Stallcop, J. R.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 13, 2013
Publication Date
June 1, 1987
Subject Category
Thermodynamics And Statistical Physics
Report/Patent Number
AIAA PAPER 87-1632
Accession Number
87A43129
Funding Number(s)
CONTRACT_GRANT: NCC2-387
Distribution Limits
Public
Copyright
Other

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