NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Semiclassical S-matrix theory of vibrationally inelastic collisions between two diatomic moleculesWe derive a semiclassical S matrix for vibrationally inelastic collisions between two diatomic molecules, assuming a collinear geometry. Our theory incorporates a quantum mechanical superposition principle with classical dynamics and, as such, is an extension of the atom-diatomic molecule theory of Miller. The several approximations to the S matrix differ in the complexity with which the interference between various classical trajectories is treated. We report numerical calculations for H2-D2 and D2-D2 collisions based on two different interaction potentials. The cruder approximations yield transition probabilities which agree with exact quantum mechanical results to within a factor of 2. More sophisticated approximations to the S matrix yield excellent quantitative agreement with the quantum calculations.
Document ID
19750030844
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Cohen, S. C.
(NASA Goddard Space Flight Center Mission Technology Div., Greenbelt, Md., United States)
Alexander, M. H.
(Maryland, University College Park, Md., United States)
Date Acquired
August 8, 2013
Publication Date
November 15, 1974
Publication Information
Publication: Journal of Chemical Physics
Volume: 61
Subject Category
Atomic And Molecular Physics
Accession Number
75A14916
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available