Relaxation and Lineshape of the 500.4-GHz Line of Ozone Perturbed by N2 and O2

Priem, D.; Colmont, J.-M.; Rohart, F.; Wlodarczak, G.; Gamache, Robert R.

doi:10.1006/jmsp.2000.8208

Cited by 48 publications

(58 citation statements)

References 57 publications

(85 reference statements)

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“…Thus it can be concluded that the Voigt profile does not match NO lineshapes. Such a feature was actually expected since it is now well established that the Voigt profile is approximate even in the millimeter range (26,27). Beside, similar observations were previously reported on the v = 2 ← 0 band of NO (11,15).…”

Section: Line Broadening Analysis and Resultssupporting

confidence: 68%

“…Experimental details have been extensively described in previous papers (26,27) and we summarize here the main features. Experiments have been performed using a videotype spectrometer including a backward wave oscillator from Istock (Nizhniy Novgorod, Russia) as a source and an InSb bolometer, cooled to liquid helium temperature, as a detector.…”

Section: Methodsmentioning

confidence: 99%

“…As developed in previous papers (26,27), the statistical error σ is a lower estimation of the uncertainty on the retrieved parameters. From our experience in linewidth measurements, more realistic uncertainties taking into account systematic errors should be about 3% for the broadening parameters and probably about 10-15% for the n-temperature exponents.…”

Section: No: Experimental Relaxation Parameters Retrieved From the Vomentioning

confidence: 98%

“…Here, the same model as in Ref. (26,27) was used. In short, we have considered the speed-dependent Galatry profile (SDGP) proposed by Ciurylo and Szudy (25) that takes simultaneously into account the speed dependence of relaxation and soft velocity-changing collisions.…”

Section: Lineshape Analysismentioning

confidence: 99%

See 3 more Smart Citations

N2- and O2-Broadenings and Lineshapes of the 551.53-GHz Line of 14NO

Colmont

Deü

Rohart

et al. 2001

Journal of Molecular Spectroscopy

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Section: Line Broadening Analysis and Resultssupporting

confidence: 68%

Section: Methodsmentioning

confidence: 99%

Section: No: Experimental Relaxation Parameters Retrieved From the Vomentioning

confidence: 98%

Section: Lineshape Analysismentioning

confidence: 99%

See 2 more Smart Citations

N2- and O2-Broadenings and Lineshapes of the 551.53-GHz Line of 14NO

Colmont

Deü

Rohart

et al. 2001

Journal of Molecular Spectroscopy

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“…In addition, under conditions of low and intermediate ratios of the collisional width, Γ , to the Doppler width, Γ D , the lineshape affected by the speed dependence of collisional broadening can often be well modeled by the Dicke narrowed profile. 41,55 Unfortunately, this treatment leads to a nonlinear pressure dependence of the narrowing parameter Re(ν opt ) 14,56,57 in this intermediate case (i.e., 1 < Γ /Γ D < 5). This nonphysical result can be seen in the R(24) NGP fit shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Observations of Dicke narrowing and speed dependence in air-broadened CO2 lineshapes near 2.06 μm

Bui

Long

Cygan

et al. 2014

The Journal of Chemical Physics

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The line shape problem in the near-infrared spectrum of self-colliding CO 2 molecules: Experimental investigation and test of semiclassical models J. Chem. Phys. 130, 184306 (2009) Frequency-stabilized cavity ring-down spectroscopy was used to study CO 2 lineshapes in the (20013) ← (00001) band centered near 2.06 μm. Two rovibrational transitions were chosen for this study to measure non-Voigt collisional effects for air-broadened lines over the pressure range of 7 kPa-28 kPa. Lineshape analysis for both lines revealed evidence of simultaneous Dicke (collisional) narrowing and speed-dependent effects that would introduce biases exceeding 2% in the retrieved air-broadening parameters if not incorporated in the modeling of CO 2 lineshapes. Additionally, correlations between velocity-and phase/state changing collisions greatly reduced the observed Dicke narrowing effect. As a result, it was concluded that the most appropriate line profile for modeling CO 2 lineshapes near 2.06 μm was the correlated speed-dependent NelkinGhatak profile, which includes all of the physical effects mentioned above and leads to a consistent set of line shape parameters that are linear with gas pressure. © 2014 AIP Publishing LLC.

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Relaxation and Lineshape of the 500.4-GHz Line of Ozone Perturbed by N2 and O2

Cited by 48 publications

References 57 publications

N2- and O2-Broadenings and Lineshapes of the 551.53-GHz Line of 14NO

N2- and O2-Broadenings and Lineshapes of the 551.53-GHz Line of 14NO

Observations of Dicke narrowing and speed dependence in air-broadened CO2 lineshapes near 2.06 μm

Analytical Evaluation of the Maxwell–Boltzmann Velocity Average in Pressure-Broadened Half-Width Calculations

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