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
      Physical Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE