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Vibrational relaxation and dissociation in nitrogenCalculations of the vibrational and dissociation transition probabilities are made for N2-N2 and N2-N collisions by means of a semiclassical N-state approximation. The flaws in previous techniques are reviewed, with special attention given to the prediction of overtones. The method presented ignores the effects of molecular rotation and employs a revised extended Rydberg intermolecular potential to describe diatom-diatom and diatom-atom collisions. The collision velocities investigated exhibit probabilities of less than unity by means of the N-state method. The continuum is quantized to treat dissociation, and the collision results demonstrate probability enhancements for V-V-T transitions in both bound-bound and bound-free transitions. The technique is of particular interest for the theoretical modeling of reentry flows such as those encountered in aerobraking maneuvers.
Document ID
19910058813
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Varghese, Philip L.
(Texas, University Austin, United States)
Gonzales, David A.
(Texas Univ. Austin, TX, United States)
Date Acquired
August 15, 2013
Publication Date
June 1, 1991
Subject Category
Atomic And Molecular Physics
Report/Patent Number
AIAA PAPER 91-1370
Accession Number
91A43436
Funding Number(s)
CONTRACT_GRANT: NGT-70032
CONTRACT_GRANT: NAGW-964
Distribution Limits
Public
Copyright
Other

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