Energy-dependent collisional deactivation of vibrationally excited azulene
Collisional energy transfer parameters for highly vibrationally excited azulene have been deduced from new infrared fluorescence (IRF) emission lifetime data with an improved calibration relating IRF intensity to vibrational energy (J. Shi, D. Bernfeld, and J. R. Barker, J. Chem. Phys. 88, XXXX (1988), preceding paper). In addition, data from previous experiments (M. J. Rossi, J. R. Pladziewicz, and J. R. Barker, J. Chem. Phys. 78, 6695 (1983)) have been reanalyzed based on the improved calibration. Inversion of the IRF decay curves produced plots of energy decay, which were analyzed to determine <..delta..E>, the average energy transferred per collision. Master equation simulations reproduced both the original IRF decays and the deduced energy decays. A third (simple) method of <..delta..E> determination agrees well with the other two. The results show <..delta..E> to be nearly directly proportional to the vibrational energy of the excited azulene from approx.8000 to 33 000 cm/sup -1/. At high energies, there are indications that the <..delta..E> energy dependence may be slightly reduced.
- Research Organization:
- Department of Atmospheric, Oceanic, and Space Sciences, Space Physics Research Laboratory, University of Michigan, Ann Arbor, Michigan 48109-2143
- OSTI ID:
- 5310828
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 88:10; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
640304 -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
AZULENE
COLLISIONS
EMISSION SPECTRA
ENERGY DEPENDENCE
ENERGY LEVELS
ENERGY TRANSFER
EXCITED STATES
FLUORESCENCE
HYDROCARBONS
INFRARED SPECTRA
LUMINESCENCE
MOLECULE COLLISIONS
MOLECULE-MOLECULE COLLISIONS
ORGANIC COMPOUNDS
SPECTRA
VIBRATIONAL STATES