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Title: Diode laser probing of vibrational, rotational, and translational excitation of CO sub 2 following collisions with O( sup 1 D). I. Inelastic scattering

Abstract

Time domain diode laser absorption spectroscopy has been used to measure state-specific energy deposition in the vibrational, rotational, and translational degrees of freedom of CO{sub 2} following the 248 nm photolysis of ozone in a low pressure mixture of CO{sub 2}, O{sub 3}, and O{sub 2}. Nascent rotational population distributions have been measured in a number of low-lying CO{sub 2} vibrational levels, including 00{sup 0}0, 01{sup 1}0, 02{sup 2}0, 02{sup 0}0, 03{sup 3}0, 10{sup 0}0, and 00{sup 0}1. In addition, measurements of CO{sub 2} translational excitation have been obtained for the majority of the rovibrational states which were probed. The results suggest that the prompt absorption signals observed so far arise from inelastic scattering between CO{sub 2} and the translationally hot O({sup 1}D) and O{sub 2}({sup 1}{Delta}) photofragments rather than electronic quenching of O({sup 1}D) to O({sup 3}P) by collisions with CO{sub 2}. Simple calculations indicate that the latter process should provide substantially more CO{sub 2} rotational and translational excitation than is observed here.

Authors:
; ; ;  [1]
  1. (Department of Chemistry, Columbia University, New York, NY (USA) Columbia Radiation Laboratory, Columbia University, New York, NY (USA))
Publication Date:
OSTI Identifier:
6361800
DOE Contract Number:  
FG02-88ER13937
Resource Type:
Journal Article
Journal Name:
Journal of Chemical Physics; (USA)
Additional Journal Information:
Journal Volume: 93:5; Journal ID: ISSN 0021-9606
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; CARBON DIOXIDE; ATOM-MOLECULE COLLISIONS; EXCITATION; OXYGEN; ENERGY-LEVEL TRANSITIONS; INELASTIC SCATTERING; LASER SPECTROSCOPY; OZONE; PHOTOLYSIS; ROTATIONAL STATES; VIBRATIONAL STATES; ATOM COLLISIONS; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; CHEMICAL REACTIONS; COLLISIONS; DECOMPOSITION; ELEMENTS; ENERGY LEVELS; EXCITED STATES; MOLECULE COLLISIONS; NONMETALS; OXIDES; OXYGEN COMPOUNDS; PHOTOCHEMICAL REACTIONS; SCATTERING; SPECTROSCOPY; 640304* - Atomic, Molecular & Chemical Physics- Collision Phenomena

Citation Formats

Zhu, L., Kreutz, T.G., Hewitt, S.A., and Flynn, G.W. Diode laser probing of vibrational, rotational, and translational excitation of CO sub 2 following collisions with O( sup 1 D). I. Inelastic scattering. United States: N. p., 1990. Web. doi:10.1063/1.458861.
Zhu, L., Kreutz, T.G., Hewitt, S.A., & Flynn, G.W. Diode laser probing of vibrational, rotational, and translational excitation of CO sub 2 following collisions with O( sup 1 D). I. Inelastic scattering. United States. doi:10.1063/1.458861.
Zhu, L., Kreutz, T.G., Hewitt, S.A., and Flynn, G.W. Sat . "Diode laser probing of vibrational, rotational, and translational excitation of CO sub 2 following collisions with O( sup 1 D). I. Inelastic scattering". United States. doi:10.1063/1.458861.
@article{osti_6361800,
title = {Diode laser probing of vibrational, rotational, and translational excitation of CO sub 2 following collisions with O( sup 1 D). I. Inelastic scattering},
author = {Zhu, L. and Kreutz, T.G. and Hewitt, S.A. and Flynn, G.W.},
abstractNote = {Time domain diode laser absorption spectroscopy has been used to measure state-specific energy deposition in the vibrational, rotational, and translational degrees of freedom of CO{sub 2} following the 248 nm photolysis of ozone in a low pressure mixture of CO{sub 2}, O{sub 3}, and O{sub 2}. Nascent rotational population distributions have been measured in a number of low-lying CO{sub 2} vibrational levels, including 00{sup 0}0, 01{sup 1}0, 02{sup 2}0, 02{sup 0}0, 03{sup 3}0, 10{sup 0}0, and 00{sup 0}1. In addition, measurements of CO{sub 2} translational excitation have been obtained for the majority of the rovibrational states which were probed. The results suggest that the prompt absorption signals observed so far arise from inelastic scattering between CO{sub 2} and the translationally hot O({sup 1}D) and O{sub 2}({sup 1}{Delta}) photofragments rather than electronic quenching of O({sup 1}D) to O({sup 3}P) by collisions with CO{sub 2}. Simple calculations indicate that the latter process should provide substantially more CO{sub 2} rotational and translational excitation than is observed here.},
doi = {10.1063/1.458861},
journal = {Journal of Chemical Physics; (USA)},
issn = {0021-9606},
number = ,
volume = 93:5,
place = {United States},
year = {1990},
month = {9}
}