Accession Number : ADA333985
Title : Characterization of UV Emissions Resulting from Electronic Energy Transfer in Atmospheric Molecules
Descriptive Note : Final rept. Nov 92-Mar 97
Corporate Author : ORION INTERNATIONAL TECHNOLOGIES INC ALBUQUERQUE NM
Personal Author(s) : Dentamaro, Anthony V. ; Thomas, Joseph M.
PDF Url : ADA333985
Report Date : NOV 1997
Pagination or Media Count : 61
Abstract : State-specific experiments were performed which studied collision induced electronic transitions (CIET) in a diatomic molecule. These optical-optical double resonance (OODR) experiments employed a resonance enhanced multiphoton ionization (REMPI) technique for purposes of detection. A strong dependence on Franck-Condon factor (FCF) and small energy gap, as well as a propensity for conservation of rotational angular momentum have become trademarks of our CIET experiments. Present theoretical models of these processes are not able to fully reproduce the observed results, thus making it impoflant to perform experiments which consider a wide range of energy gaps and FCF. The volume of our data has led to the development of an empirical branching ratio model which appears to be quite accurate and useful in predicting deactivation rate constants for CIET in various diatomic molecules. These results have been incorporated into a model of atmospheric Lyman-Birge-Hopfield (LBH) emissions.
Descriptors : *DIATOMIC MOLECULES, *ATMOSPHERE MODELS, *ATMOSPHERIC CHEMISTRY, ULTRAVIOLET RADIATION, EMISSION SPECTRA, ENERGY TRANSFER, NITROGEN, KINETIC ENERGY, PHOTOIONIZATION, CARBON MONOXIDE, ELECTRON TRANSITIONS, PARTICLE COLLISIONS.
Subject Categories : Atmospheric Physics
Atomic and Molecular Physics and Spectroscopy
Distribution Statement : APPROVED FOR PUBLIC RELEASE