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

Report Date:

1997-11-01

Pagination or Media Count:

61.0

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.

Subject Categories:

  • Atmospheric Physics
  • Physical Chemistry
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE