Simultaneous Effect of Doppler and Foreign Gas Broadening on Spectral Lines

Galatry, L.

doi:10.1103/physrev.122.1218

Cited by 704 publications

(312 citation statements)

References 12 publications

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“…3). Several velocity-dependent models and corresponding profiles have been reported in the literature, with underlying physics that should also be relevant for wall-collision line broadening, such as the Galatry profile [30], Rautian-Sobelman profile [31], and the speed-dependent Voigt profile [25].…”

Section: Resultsmentioning

confidence: 99%

Wall-collision line broadening of molecular oxygen within nanoporous materials

Lewander

Andersson‐Engels

et al. 2011

Phys. Rev. A

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Section: Resultsmentioning

confidence: 99%

Wall-collision line broadening of molecular oxygen within nanoporous materials

Lewander

Andersson‐Engels

et al. 2011

Phys. Rev. A

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“…Moreover this also demonstrates that the precision of the measured spectrum significantly exceeds its accuracy. Figures 5 (b) -(e) show the residuals from NelkinGhatak profile (NGP), 17,39 speed-dependent empirical Nelkin-Ghatak profile (SD e NGP), 43,44 Galatry profile (GP) 38 and the exact speed-dependent empirical Galatry profile (SD e GP), 24 respectively. Note that the NelkinGhatak and Galatry names indicate that the HC and SC models were used to describe the velocity-changing collisions, respectively.…”

Section: B Spectral Analysismentioning

confidence: 99%

“…We quantified the systematic errors in molecular spectra analysis caused by use of oversimplified phenomenological models of velocitychanging collisions like the hard-and soft-collision (SC 36 and HC 37 , respectively) models often used in spectral line shapes analysis. 17,[38][39][40][41][42][43][44][45] .…”

Section: Introductionmentioning

confidence: 99%

Velocity-changing collisions in pure H2 and H2-Ar mixture

Wcisło

Tran

Kassi

et al. 2014

The Journal of Chemical Physics

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We show how to effectively introduce a proper description of the velocity-changing collisions into the model of isolated molecular transition for the case of self-and Ar-perturbed H 2 . We demonstrate that the billiardball (BB) approximation of the H 2 -H 2 and H 2 -Ar potentials gives an accurate description of the velocitychanging collisions. The BB model results are compared with ab initio classical molecular dynamics simulations (CMDS). It is shown that the BB model correctly reproduces not only the principal properties such as frequencies of velocity-changing collisions or collision kernels, but also other characteristics of H 2 -H 2 and H 2 -Ar gas kinetics like rate of speed-changing collisions. Finally, we present line-shape measurement of Q (1) line of the first overtone band of self-perturbed H 2 . We quantify the systematic errors of line-shape analysis caused by the use of oversimplified description of velocity-changing collisions. These conclusions will have significant impact on recent rapidly developing ultra-accurate metrology based on Doppler-limited spectroscopic measurements like Doppler-width thermometry, atmosphere monitoring, Boltzmann constant determination or transition position and intensity determination for fundamental studies.

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“…Several line-shape models were used in the data analysis, all of which include the Doppler broadening, the collisional broadening and shifting. We also considered the velocity changing collisions in terms of the soft-collision model (the Galatry profile, GP) [28] and the hard-collision model (the Nelkin-Ghatak profile, NGP) [29], as well as their speed-dependent versions: the speeddependent Galatry profile (SDGP) [30] and the speeddependent Nelkin-Ghatak profile (SDNGP) [31], respectively. We additionally tested the speed-dependent Voigt profile (SDVP) [32], which includes the speed dependence of collisional broadening and shifting but neglects the velocity changing collisions.…”

Section: Measurements and Data Analysismentioning

confidence: 99%

Absolute frequency determination of molecular transition in the Doppler regime at kHz level of accuracy

Bielska

Wójtewicz

Morzynski

et al. 2017

Journal of Quantitative Spectroscopy and Radiative Transfer

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We measured absolute frequency of the unperturbed P7 P7 O2 B-band transition ν0 = 434783.5084857(82) GHz and the collisional self-shift coefficient δ = −9.381(62) × 10 −21 GHz/(molecule/cm 3 ). With Doppler-limited spectroscopy we achieved the relative standard uncertainty of 2 × 10 −11 on line position, typical for Doppler-free techniques. Shapes of the spectral line were measured with a Pound-Drever-Hall-locked frequency-stabilized cavity ring-down spectrometer referenced to an 88 Sr optical atomic clock via an optical frequency comb.

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Simultaneous Effect of Doppler and Foreign Gas Broadening on Spectral Lines

Cited by 704 publications

References 12 publications

Wall-collision line broadening of molecular oxygen within nanoporous materials

Wall-collision line broadening of molecular oxygen within nanoporous materials

Velocity-changing collisions in pure H2 and H2-Ar mixture

Absolute frequency determination of molecular transition in the Doppler regime at kHz level of accuracy

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