Translationally and rotationally resolved excitation of CO[sub 2](00[sup 0]2) by collisions with hot hydrogen atoms

Journal Article · Thu Apr 15 00:00:00 EDT 1993 · Journal of Chemical Physics; (United States)

DOI:https://doi.org/10.1063/1.464833· OSTI ID:6697653

Khan, F A; Kreutz, T G; Flynn, G W ^[1]; Weston, Jr, R E ^[2]

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1. Department of Chemistry and Columbia Radiation Laboratory, Columbia University, New York, New York 10027 (United States)
2. Department of Chemistry, Brookhaven National Laboratory, Upton, New York 11973 (United States)

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 (00[sup 0]2) vibrational state by collisions with translationally hot hydrogen atoms. The 00[sup 0]2 rotational population distribution and rotationally resolved linewidths are remarkably similar to those previously obtained for 00[sup 0]1. Within the context of a simple physical model used to interpret the data, the similar rotational distributions and translational recoils for 00[sup 0]1 and 00[sup 0]2 suggest that these two states are excited by similar collision trajectories, wherein asymmetric stretching excitation is optimized when H strikes near the end of the O--C--O molecule. The magnitude of population scattered into 00[sup 0]2 is [similar to]21 times smaller than that scattered into 00[sup 0]1.

• DOE Contract Number: FG02-88ER13937
• OSTI ID: 6697653
• Journal Information: Journal of Chemical Physics; (United States), Journal Name: Journal of Chemical Physics; (United States) Vol. 98:8; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION SPECTRA
ASYMMETRY
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COLLISIONS
DECOMPOSITION
DIFFUSION
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY LEVELS
ENERGY TRANSFER
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
LASERS
LINE WIDTHS
MATHEMATICAL MODELS
MOLECULE COLLISIONS
NONMETALS
OPTIMIZATION
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
RADIATIONS
RESOLUTION
ROTATIONAL STATES
SPECTRA
SULFIDES
SULFUR COMPOUNDS
TRAJECTORIES
TUNING
ULTRAVIOLET RADIATION
VIBRATIONAL STATES