Collisional excitation of CO sub 2 (01 sup 1 1) by hot hydrogen atoms: Alternating intensities in state-resolved vibrational, rotational, and translational energy transfer

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · Journal of Chemical Physics; (USA)

DOI:https://doi.org/10.1063/1.459718· OSTI ID:6718964

Khan, F A; Kreutz, T G; O'Neill, J A; Wang, C X; Flynn, G W ^[1]; Weston, Jr, R E ^[2]

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1. Department of Chemistry, Columbia University, New York, NY (USA) Columbia Radiation Laboratory, Columbia University, New York, NY (USA)
2. Department of Chemistry, Brookhaven National Laboratory, Upton, NY (USA)

Time domain tunable diode laser absorption spectroscopy has been used to measure rotationally resolved transient absorption line shapes and nascent rotational populations for CO{sub 2} molecules excited into the (01{sup 1}1) vibrational state by collisions with translationally hot hydrogen atoms. The even rotational levels are more heavily populated than the odd levels, in agreement with propensity rules derived earlier by Alexander and Clary. The nascent populations and transient linewidths are interpreted in terms of a theoretical model that lends insight into the H--CO{sub 2} collision dynamics. The cross section for exciting (01{sup 1}1) is {similar to}0.23 times the cross section for exciting (00{sup 0}1), and {similar to}0.38 times the cross section for exciting (10{sup 0}0).

• DOE Contract Number: FG02-88ER13937
• OSTI ID: 6718964
• Journal Information: Journal of Chemical Physics; (USA), Journal Name: Journal of Chemical Physics; (USA) Vol. 93:1; ISSN JCPSA; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION SPECTROSCOPY
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
COLLISIONS
CROSS SECTIONS
ELEMENTS
ENERGY LEVELS
ENERGY TRANSFER
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
HYDROGEN
LASER SPECTROSCOPY
LINE WIDTHS
MOLECULE COLLISIONS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
ROTATIONAL STATES
SPECTROSCOPY
VIBRATIONAL STATES