Quenching of N/sub 2/(a /sup 1/Pi/sub g/, v' = 0) by N/sub 2/, O/sub 2/, CO, CO/sub 2/, CH/sub 4/, H/sub 2/, and Ar
We have determined quenching rate coefficients for N/sub 2/(a /sup 1/Pi/sub g/, v' = 0) by N/sub 2/, O/sub 2/, H/sub 2/, CO/sub 2/, Ar, CH/sub 4/, and CO using two-photon laser excitation. Quenching by N/sub 2/ appears to proceed via collisional coupling to N/sub 2/(a' /sup 1/..sigma../sup -//sub u/, v = 0) with a rate coefficient of 2.2 +- 0.2 x 10/sup -11/ cm/sup 3/ molecule/sup -1/ s/sup -1/. Quenching by Ar is nearly as efficient. Gas-kinetic rate coefficients are obtained for quenching by CO, O/sub 2/, H/sub 2/, CO/sub 2/, and CH/sub 4/. Collisional energy transfer from N/sub 2/(a,0) to CO(A) is observed in these experiments. However, quenching by O/sub 2/, H/sub 2/, CO/sub 2/, and CH/sub 4/ is thought to be reactive.
- Research Organization:
- Physical Sciences, Inc., Research Park, P.O. Box 3100, Andover, Massachusetts 01810
- OSTI ID:
- 6547906
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 90:4; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420300* -- Engineering-- Lasers-- (-1989)
ALKANES
ARGON
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
COLLISIONS
DE-EXCITATION
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY LEVELS
ENERGY TRANSFER
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
FLUIDS
GAS LASERS
GASES
HYDROCARBONS
HYDROGEN
KINETICS
LASERS
METASTABLE STATES
METHANE
MOLECULE COLLISIONS
MOLECULE-MOLECULE COLLISIONS
NITROGEN
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
QUENCHING
RADIATIONLESS DECAY
RARE GASES