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Validity of approximate methods in molecular scattering - Thermal HCl-He collisionsAccurate close coupling scattering calculations are presented for thermal energy HCl-He collisions. The interaction potential is obtained from the Gordon-Kim electron gas model, adjusted to have the correct long-range multipole form. A variety of phenomenological cross sections are computed from the close coupling S matrix, and these are compared with results from several commonly employed approximate methods. In particular, it is found that the total integral, total differential, and gas kinetic cross sections are accurately predicted by the central field approximation which retains just the spherical average of the interaction. Integral inelastic cross sections are represented quite accurately by the coupled states approximation of McGuire and Kouri, but only qualitatively by the effective potential method of Rabitz.
Document ID
19760030690
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Green, S.
(NASA Goddard Institute for Space Studies; Columbia University New York, N.Y., United States)
Monchick, L.
(Johns Hopkins University Laurel, Md., United States)
Date Acquired
August 8, 2013
Publication Date
November 15, 1975
Publication Information
Publication: Journal of Chemical Physics
Volume: 63
Subject Category
Atomic And Molecular Physics
Accession Number
76A13656
Funding Number(s)
CONTRACT_GRANT: NSG-7105
CONTRACT_GRANT: N00017-72-C-4401
Distribution Limits
Public
Copyright
Other

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