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Pressure broadening of rotational bands. I - A statistical theoryAbsorption of electromagnetic waves by rotational transitions of molecules is formulated for the case in which the wave frequency is displaced from resonance by an amount large compared to the reciprocal duration of a typical binary collision, and also large compared to the differences between frequencies of the strong resonances of the gas. In this far-wing limit, Fano's relaxation operator is reduced to a scalar parameter which depends on the frequency displacement. This relaxation parameter is not symmetric with respect to reflection about resonance, but becomes symmetric when multiplied by the factor exp (h/2pi) (omega sub d)/2kT where omega sub d is the frequency displacement. The theory applies to dipolar molecules of any shape, in collisions with either dipolar or quadrupolar molecules.
Document ID
19860034144
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Rosenkranz, P. W.
(MIT Cambridge, MA, United States)
Date Acquired
August 12, 2013
Publication Date
December 15, 1985
Publication Information
Publication: Journal of Chemical Physics
Volume: 83
ISSN: 0021-9606
Subject Category
Atomic And Molecular Physics
Accession Number
86A18882
Funding Number(s)
CONTRACT_GRANT: NAG5-10
Distribution Limits
Public
Copyright
Other

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