Temperature dependence of rotationally resolved excitation of CO/sub 2/(00/sup 0/1) by collisions with hot hydrogen atoms

Journal Article · Thu Nov 03 04:00:00 EST 1988 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100333a001· OSTI ID:6085137

Khan, F A; Kreutz, T G; Zhu, L; Flynn, G W; Weston, Jr, R E

The temperature dependence of rovibrational excitation of CO/sub 2/(00/sup 0/1) via collisions with translationally hot hydrogen atoms has been measured by means of time domain absorption spectroscopy using a tunable IR diode laser. The total population excited into 00/sup 0/1 at 223 K is measured to be 0.86 /plus minus/ 0.15 of that found at room temperature (298 K), suggesting that the 01/sup 1/0 ..-->.. 00/sup 0/1 scattering channel is not more efficient than the 00/sup 0/1 channel, despite its smaller energy defect (1682 vs 2349 cm/sup -1/). Since only 8% of the CO/sub 2/ molecules are found in the 01/sup 1/0 level at room temperature, inelastic scattering from this state does not significantly contribute to collisional excitation in the 00/sup 0/1 level.

• Research Organization: Columbia Univ., New York, NY (USA)
• DOE Contract Number: FG02-88ER13937
• OSTI ID: 6085137
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 92:22; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ABSORPTION SPECTROSCOPY
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
COLLISIONS
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY
ENERGY LEVELS
EXCITED STATES
HYDROGEN
INELASTIC SCATTERING
INFRARED RADIATION
KINETIC ENERGY
LASERS
MOLECULE COLLISIONS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
ROTATIONAL STATES
SCATTERING
SEMICONDUCTOR DEVICES
SEMICONDUCTOR LASERS
SPECTROSCOPY
TEMPERATURE DEPENDENCE