Stimulated Raman spectroscopy in hydrogen gas

Lallemand, Pierre; Simova, P.

doi:10.1016/0022-2852(68)90171-9

Cited by 44 publications

(13 citation statements)

References 18 publications

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“…[34][35][36][37][38][39][40] When the hydrogen molecule is no longer considered as an isolated entity, the intermolecular potential perturbs the anharmonic intramolecular potential…”

Section: Raman Spectroscopy: a Tool For Probing The Intermoleculamentioning

confidence: 99%

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Adsorption ofH2on carbon-based materials: A Raman spectroscopy study

Centrone

Zerbi

2005

Phys. Rev. B

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We made use of the Raman spectroscopy to investigate the mechanism of hydrogen adsorption on carbon materials. We have recorded the Raman active roto-vibrational Q branch of adsorbed hydrogen at various temperatures and pressures and we have developed a qualitatively theoretical model for the interpretation of the spectra. Because of the small Raman shifts observed for the Q branch we conclude that no charge transfer phenomena are involved in the interaction with the adsorbing material, but only a simple physisorption takes place; moreover, no C -H stretching signals in the region of ͑2800-3300͒ were detected, thus indicating that chemisorption, if any, should be negligible.

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“…[34][35][36][37][38][39][40] When the hydrogen molecule is no longer considered as an isolated entity, the intermolecular potential perturbs the anharmonic intramolecular potential…”

Section: Raman Spectroscopy: a Tool For Probing The Intermoleculamentioning

confidence: 99%

“…It was found, from experimental data, 34,35,40 that the perturbation of the Raman active Q branch is a function ͑power series͒ of density…”

Section: Raman Spectroscopy: a Tool For Probing The Intermoleculamentioning

confidence: 99%

Adsorption ofH2on carbon-based materials: A Raman spectroscopy study

Centrone

Zerbi

2005

Phys. Rev. B

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“…These shifts are due to perturbation of the monomer level energies induced by collisions between hydrogen and argon. The experimental pressure shifting coefficients used in our analysis are those for the Q 1 (0) Raman line of H 2 in Ar reported by Farrow et al 42 and Berger et al 43 Earlier measurements reported by Lallemand and Simova 65 have been omitted from the fits, since they cover only a narrow temperature range and are effectively supplanted by the more accurate modern data.…”

Section: Experimental Data Used In the Analysismentioning

confidence: 99%

A reliable new potential energy surface for H2–Ar

Bissonnette

Chuaqui

Crowell

et al. 1996

The Journal of Chemical Physics

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A reliable new three-dimensional potential energy surface is obtained for the H 2 -Ar system using an exchange-coulomb potential model with five parameters determined empirically from a least-squares fit to experimental data. This surface fully accounts for new high resolution IR data, virial coefficients, and vibrational transition pressure-shifting coefficients used in the analysis, and yields excellent predictions of elastic and inelastic scattering cross sections and hyperfine transition intensities not included in the analysis. Quantitative comparisons with the best previous empirical potential and a high quality fully ab initio potential are also presented.

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“…Notice that in spite of these specific motivations, only few data are available [7,8]. The aim of this paper is to perform an exhaustive experimental study of the Q-line profiles.…”

Section: Introductionmentioning

confidence: 99%

“…respectively][7,8]. For pure Hi and for the Hi-He mixture, the residual Doppler effect must be accounted for in this "Dicke regime. "…”

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confidence: 99%

H2-He vibrational line-shape parameters: Measurement and semiclassical calculation

et al. 1995

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High-resolutioninverse Raman spectroscopy has been used to obtain the line shifting and line broadening coefficients of H2 perturbed by He. Measurements have been made for the Q-branch transitions {J =0 to 5) in a density range of 10 to 20 amagat and from 296 to 995 K. Up to 795 K we have directly deduced from the experimental broadening coeKcients the inelastic rotational state-to-state and vibrational dephasing rates. At higher temperatures, owing to the larger number of channels of relaxation which occur, the results have been analyzed using a scaling law. The line shift and broadening coefficients exhibit a square root and a linear dependence on temperature, respectively, and a significant J dependence. Semiclassical calculations based on an accurate ab initio potential lead to line-shape parameters consistent with experiment. They allow a clear understanding of their observed temperature dependence.PACS number(s): 33.70.Jg

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Stimulated Raman spectroscopy in hydrogen gas

Cited by 44 publications

References 18 publications

Adsorption ofH2on carbon-based materials: A Raman spectroscopy study

Adsorption ofH2on carbon-based materials: A Raman spectroscopy study

A reliable new potential energy surface for H2–Ar

H2-He vibrational line-shape parameters: Measurement and semiclassical calculation

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