Infrared fluorescence studies of near-resonant electronic-to-vibrational energy-transfer collisions: Br(4/sup 2/P/sub 1/2/) + NO
Near-resonant electronic-to-vibrational (E-V) energy transfer from excited bromine atoms to nitric oxide molecules has been investigated by an excimer laser photolysis technique. Bromine atoms were generated by photodissociation of CF/sub 3/Br, and vibrationally excited NO molecules produced by E-V transfer collisions were detected by infrared fluorescence in the 5.4-..mu..m region. The total rate coefficient for quenching of Br* by NO was determined to be (5.3 +/- 0.9) x 10/sup -12/ cm/sup 3/ molecule/sup -1/ s/sup -1/. Approximately 84% of the E-V transfer collisions excite nitric oxide to the nu = 2 level, which is nearly resonant with the electronic energy of the bromine atoms. The V-V energy-transfer rate coefficient for self-relaxation of NO(nu=2) molecules by NO was determined to be (1.2 +/- 0.4) x 10/sup -12/ cm/sup 3/ molecule/sup -1/ s/sup -1/, in good agreement with previously reported values.
- Research Organization:
- Univ. of Utah, Salt Lake City
- OSTI ID:
- 5630280
- Journal Information:
- J. Phys. Chem.; (United States), Vol. 90:12
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
54 ENVIRONMENTAL SCIENCES
ATOM-MOLECULE COLLISIONS
ENERGY TRANSFER
BROMINE
PHOTOLYSIS
NITRIC OXIDE
EXCIMER LASERS
EXPERIMENTAL DATA
RYDBERG STATES
VIBRATIONAL STATES
ATOM COLLISIONS
CHALCOGENIDES
CHEMICAL REACTIONS
COLLISIONS
DATA
DECOMPOSITION
ELEMENTS
ENERGY LEVELS
EXCITED STATES
GAS LASERS
HALOGENS
INFORMATION
LASERS
MOLECULE COLLISIONS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
400201* - Chemical & Physicochemical Properties
500200 - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)
400500 - Photochemistry