Vibrational relaxation of highly excited SF/sub 6/ by Ar
Journal Article
·
· J. Chem. Phys.; (United States)
OSTI ID:6118975
The method of time-resolved optoacoustics was used to measure the time constant tau for the vibrational relaxation of SF/sub 6/ by Ar as a function of the average initial excitation <>/sub 0/. It was found that ptau = 210 +- 30 ..mu..s Torr for <>/sub 0/ between 4000 and 19 000 cm/sup -1/, implying nearly pure exponential decay. The average amount of energy change per collision varies linearly with <>, having a value of -8 cm/sup -1//collision at 19 000 cm/sup -1/. Below 4000 cm/sup -1/ ptau increases, approaching the low energy value obtained from IR fluorescence measurements.
- Research Organization:
- Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois 60680
- OSTI ID:
- 6118975
- Journal Information:
- J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 87:10; ISSN JCPSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
CHEMICAL REACTION KINETICS
COLLISIONS
ELEMENTS
ENERGY LEVELS
ENERGY TRANSFER
EXCITED STATES
FLUIDS
FLUORIDES
FLUORINE COMPOUNDS
GASES
HALIDES
HALOGEN COMPOUNDS
KINETICS
MOLECULE COLLISIONS
NONMETALS
RARE GASES
REACTION KINETICS
RELAXATION
SULFUR COMPOUNDS
SULFUR FLUORIDES
VIBRATIONAL STATES
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
CHEMICAL REACTION KINETICS
COLLISIONS
ELEMENTS
ENERGY LEVELS
ENERGY TRANSFER
EXCITED STATES
FLUIDS
FLUORIDES
FLUORINE COMPOUNDS
GASES
HALIDES
HALOGEN COMPOUNDS
KINETICS
MOLECULE COLLISIONS
NONMETALS
RARE GASES
REACTION KINETICS
RELAXATION
SULFUR COMPOUNDS
SULFUR FLUORIDES
VIBRATIONAL STATES