Accurate collision-induced line-coupling parameters for the fundamental band of CO in He: Close coupling and coupled states scattering calculations

Green, Sheldon; Boissoles, J.; Boulet, C.

doi:10.1016/0022-4073(88)90017-9

Cited by 63 publications

(12 citation statements)

References 20 publications

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“…Their values can be calculated from knowledge of the CO 2 -X interaction for a simple system. 12,24,25 For molecule-molecule collisions, which involve a large number of coupled channels, they are generally modeled through analytical expressions. We have retained the Exponential-Power ͑EP͒ law, 26 i.e.,…”

Section: Real Elements Of Wmentioning

confidence: 99%

Temperature, pressure, and perturber dependencies of line-mixing effects in CO2 infrared spectra. I. Σ←Π Q branches

Rodrigues

Khalil

Doucen

et al. 1997

The Journal of Chemical Physics

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Line mixing in CO 2 infrared Q-branches. A test of the energy corrected sudden approximation AIP Conf.Experimental and theoretical results on the influence of line mixing on the shape of infrared CO 2 Q branches of importance for atmospheric applications are presented. Two Q branches of ⌺←⌸ symmetry, which lie near 618 and 720 cm Ϫ1 and belong to the 10 0 0 II ←01 1 0 I and 10 0 0 I ←01 1 0 I bands, have been studied for many conditions of temperature ͑200-300 K͒, total pressure ͑0.5-10 atm͒, and mixture ͑with He, Ar, O 2 , and N 2 ͒. The theoretical approach used is based on the Energy Corrected Sudden approximation; its parameters have been deduced from both line-broadening data and measured absorption by the Q branches. Comparisons between experimental and computed spectra demonstrate the quality of the model, regardless of the conditions. Detailed analysis of the influences of the Q-lines spectral spacing, temperature, total pressure, and collision partner are presented. They show that significantly larger line-mixing effects are obtained when CO 2 -He is considered with respect to CO 2 -͑Ar,O 2 ,N 2 ͒. This is analyzed in terms of the relative contributions of the short-and midrange interaction forces and of propensity rules resulting from the coupling of angular momenta.

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Section: Real Elements Of Wmentioning

confidence: 99%

Temperature, pressure, and perturber dependencies of line-mixing effects in CO2 infrared spectra. I. Σ←Π Q branches

Rodrigues

Khalil

Doucen

et al. 1997

The Journal of Chemical Physics

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“…For decades, spectral line shape studies of self-and foreign-broadened ro-vibrational lines of CO have captivated the interest of experimentalists and theoreticians (e.g. [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]). Many of these spectroscopic studies have been triggered by the need for highly accurate line parameters for the interpretation of atmospheric spectra recorded by spectroscopic remote sensing instruments on ground, balloon or satellite platforms.…”

Section: Introductionmentioning

confidence: 99%

“…Boissoles et al [14] have reported the theoretical line mixing coefficients of CO perturbed by He employing the infinite order sudden approximation (IOSA) and the energy corrected sudden approximation (ECSA) techniques. Green et al [15] have computed the theoretical off-diagonal collision induced broadening cross sections for the 10 band of CO broadened by helium. The authors have compared experimental spectra of CO broadened by He recorded at temperatures of 78-292 K with spectra calculated line-by-line with contributions from theoretical line mixing.…”

Section: Introductionmentioning

confidence: 99%

“…Pressure broadening coefficients were also measured at room temperature and at 85 K in the 10 band in the latter study. The authors compared their experimental results with theoretical values [15] obtained from quantum dynamical calculations. Duggan et al [18] have studied the high resolution (10 -4 cm -1 ) infrared spectra of carbon monoxide diluted by Xe, N2, and He in the intermediate pressure range.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical and revisited experimentally retrieved He-broadened line parameters of carbon monoxide in the fundamental band

Predoi‐Cross

Esteki

Rozario

et al. 2016

Journal of Quantitative Spectroscopy and Radiative Transfer

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International audienceWe report revisited experimentally retrieved and theoretically calculated He-broadened Lorentz half-width coefficients and He- pressure-shift coefficients of 45 carbon monoxide transitions in the 1<--0 band. The spectra analyzed in this study were recorded over a range of temperatures between 79 and 296 K. The He-broadened line parameters and their temperature dependences were retrieved using a multispectrum nonlinear least squares analysis program. The line shape models used in this study include Voigt, speed dependent Voigt, Rautian (to take into account confinement narrowing) and Rautian with speed dependence, all with an asymmetric component added to account for weak line mixing effects. We were unable to retrieve the temperature dependence of line mixing coefficients. A classical method was used to determine the He-narrowing parameters while quantum dynamical calculations were performed to determine He-broadening and He-pressure shifts coefficients at different temperatures. The line mixing coefficients were also derived from the exponential power gap law and the energy corrected sudden approximation. The current measurements and theoretical results are compared with other published results, where appropriate

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“…6. While not as rigorous, the Robert and Bonamy formalism has advantages over more exact theories (Green et al 1988;Green 1990) in that it is tractable for more complex molecular calculations (e.g., H 2 O; O 3 ; CH 4 ), and produces results at the 5 % accuracy level. Gamache et al (1998) extended the Robert and Bonamy theory by determining the resonance functions for all integrals that arise in a general spherical tensor expansion of the potential (Lynch 1995;Lynch et al 1998).…”

Section: Pressure Broadening Of Vibration-rotation Linesmentioning

confidence: 99%

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Huebner

Barfield

2014

Astrophysics and Space Science Library

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Accurate collision-induced line-coupling parameters for the fundamental band of CO in He: Close coupling and coupled states scattering calculations

Cited by 63 publications

References 20 publications

Temperature, pressure, and perturber dependencies of line-mixing effects in CO2 infrared spectra. I. Σ←Π Q branches

Temperature, pressure, and perturber dependencies of line-mixing effects in CO2 infrared spectra. I. Σ←Π Q branches

Theoretical and revisited experimentally retrieved He-broadened line parameters of carbon monoxide in the fundamental band

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