Study of the vibrational level dependent quenching of CO(v =1--16) by CO/sub 2/

Journal Article · Sat Dec 01 04:00:00 EST 1979 · J. Chem. Phys.; (United States)

OSTI ID:5757459

Caledonia, G E; Green, B D; Murphy, R E

The technique of time resolved Fourier spectroscopy has been used to determine rate constants for the processes CO(v)+CO/sub 2/..-->..CO(v-1)+CO/sub 2/, where the vibrationally excited CO is created through electron irradiation of Ar/CO/sub 2/ mixtures. The CO production mechanism, predominantly dissociative recombination of CO/sub 2//sup +/, is found to produce CO excited to as much as v=19. The CO(v) deactivation rate constants are deduced from examination of the time histories of the vibrational population distribution. From a Stern--Volmer analysis, the residual quenching not due to CO/sub 2/ is attributed entirely to CO(v=0) relaxation of CO(v) and radiative decay. Experimentally determined upper bounds for the CO(..delta..v=1) transition probabilities for spontaneous emission have been obtained for levels 7--12.

• Research Organization: Physical Sciences Inc., Woburn, Massachusetts 01801
• OSTI ID: 5757459
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 71:11; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
COLLISIONS
DE-EXCITATION
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
KINETICS
MOLECULE COLLISIONS
MOLECULE-MOLECULE COLLISIONS
OXIDES
OXYGEN COMPOUNDS
RELAXATION
VIBRATIONAL STATES