TITLE

Line mixing effects in the 0003–0000 band of CO2 in helium. III. Energy corrected sudden simultaneous fit of linewidths and near wing profile

AUTHOR(S)
Boissoles, J.; Thibault, F.; Le Doucen, R.; Menoux, V.; Boulet, C.
PUB. DATE
October 1994
SOURCE
Journal of Chemical Physics;10/15/1994, Vol. 101 Issue 8, p6552
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Line coupling induced by collisions leads to drastic modifications of the spectral profile of the 0003–0000 of CO2 pressurized by helium. Calculation of these modifications have been performed by using two recent energy corrected sudden (ECS) formalisms. The two formulations lead to theoretical predictions rather similar and in good agreement with the available data over extended ranges of frequency and perturber pressure. It has been shown that a simultaneous fit of the pressure broadened linewidths and the near wing profile allows a more accurate determination of the basic ECS parameters. For that purpose, it has been necessary to extend the measurement of the broadened widths to high J values (up to J≊90).
ACCESSION #
7649447

 

Related Articles

  • Rotational quenching of CO2 by collision with He atoms. Yang, Benhui; Stancil, P. C. // Journal of Chemical Physics;4/7/2009, Vol. 130 Issue 13, p134319 

    Quantum mechanical scattering calculations are presented for the rotational relaxation of CO2 in collisions with He atoms with the close-coupling approach and the coupled-states approximation for collision energies between 10-6 and 10 000 cm-1. The He–CO2 interaction potential of Ran and...

  • Ion acceleration by laser hole-boring into plasmas. Pogorelsky, I. V.; Dover, N. P.; Babzien, M.; Bell, A. R.; Dangor, A. E.; Horbury, T.; Palmer, C. A. J.; Polyanskiy, M.; Schreiber, J.; Schwartz, S.; Shkolnikov, P.; Yakimenko, V.; Najmudin, Z. // AIP Conference Proceedings;Dec2012, Vol. 1507 Issue 1, p814 

    By experiment and simulations, we study the interaction of an intense CO2 laser pulse with slightly overcritical plasmas of fully ionized helium gas. Transverse optical probing is used to show a recession of the front plasma surface with an initial velocity >106 m/s driven by hole-boring by the...

  • State-resolved inelastic collisions of single rotational, fine-structure, and Λ doublet levels of NH(A 3Π) with helium: A combined experimental and theoretical study. Neitsch, L.; Stuhl, F.; Dagdigian, Paul J.; Alexander, Millard H. // Journal of Chemical Physics;1/22/1996, Vol. 104 Issue 4, p1325 

    A comprehensive set of single-collision state-to-state rate constants for the relaxation of NH(A 3Π, v=0,N,Fi,e/f ) levels in collisions with helium are presented. These rate constants were extracted from measured fluorescence intensities of isolated A→X rotational lines in the...

  • 'Supercollision' energy dependence: State-resolved energy transfer in collisions between highly.... Wall, Mark C.; Mullin, Amy S. // Journal of Chemical Physics;6/15/1998, Vol. 108 Issue 23, p9658 

    Examines the quenching of highly vibrationally excited pyrazine through collisions with carbon dioxide as a function of initial pyrazine internal energy. Use of high resolution laser transient absorption spectrometer; Magnitudes and probabilities of energy transfer; Similarity in rotational and...

  • Molecular supercollisions: Evidence for large energy transfer in the collisional relaxation of highly vibrationally excited pyrazine by CO2. Mullin, Amy S.; Michaels, Chris A.; Flynn, George W. // Journal of Chemical Physics;4/15/1995, Vol. 102 Issue 15, p6032 

    The temperature dependence of the collisional quenching of highly vibrationally excited pyrazine by CO2 molecules has been investigated for the temperature range 243–364 K using high resolution time resolved diode laser spectroscopy. Particular emphasis is placed on vibration to...

  • Ab initio study of van der Waals interaction of CO2 with Ar. Marshall, Peter J.; Szczesniak, M. M.; Sadlej, Joanna; Chal\asinski, Grzegorz; ter Horst, Marc A.; Jameson, Cynthia J. // Journal of Chemical Physics;5/1/1996, Vol. 104 Issue 17, p6569 

    The ab initio potential energy surface of the ArCO2 cluster is calculated using the supermolecular Mo\ller–Plesset perturbation theory (S-MPPT) and dissected into its fundamental components; electrostatic, exchange, induction, and dispersion energies. The surface contains a single minimum...

  • Line mixing in the Q branches of the ν1+ν2 band of nitrous oxide and of the (1110)I←(0220) band of carbon dioxide. Margottin-Maclou, M.; Henry, A.; Valentin, A. // Journal of Chemical Physics;2/1/1992, Vol. 96 Issue 3, p1715 

    Line mixing effects have been observed in absorption spectra recorded, at room temperature, with a Fourier spectrometer. They concern the Q branches of the ν1+ν2 band of N2O, centered at 1880.2 cm-1 and of the (1110)I←(0220) band of CO2, centered at 740.8 cm-1. For the N2O spectra,...

  • Multiple collision rotational rainbows: Theory and experiment for Xe–CO2. Buck, U.; Otten, D.; Schinke, R.; Poppe, D. // Journal of Chemical Physics;1/1/1985, Vol. 82 Issue 1, p202 

    In a crossed molecular beam experiment differential energy loss spectra have been measured for Xe+CO2 collisions at energies of 0.2, 0.58, 1.0, and 1.6 eV. Nearly the complete angular range from 40° to 180° in the center-of-mass system was covered. At large deflection angles and small...

  • State resolved cross sections for rotationally inelastic collisions of NH2(X 2B1) with helium. Dagdigian, Paul J. // Journal of Chemical Physics;3/1/1989, Vol. 90 Issue 5, p2617 

    Integral cross sections for rotational transitions from the lowest orthorotational level (00,0) of NH2 induced by collisions with helium have been measured in a crossed beam experiment. A pulsed supersonic beam of rotationally cold NH2 was produced by 193 nm photolysis of a dilute mixture of...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics