FITTING LAW FOR THE DENSITY SHIFT OF Q(J) TRANSITIONS OF H2 IN H2–X (X: H2, He, N2) MIXTURES

Michaut, X.; Berger, J.M.; Sinclair, Peter M.; Berger, H.

doi:10.1016/s0022-4073(97)00230-6

Cited by 3 publications

(8 citation statements)

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“…[2] For mixtures of hydrogen with nitrogen and with a number of noble gases, this rule is broken, but for H 2 -H 2 and H 2 -H 2 O mixtures the linear law is valid, [2,3] and…”

Section: Collisional Lineshift Coefficients and Their Temperature Depmentioning

confidence: 99%

“…Although we supposed that the dominant contribution to the measured lineshift coefficients is determined by collisions with water molecules, nevertheless we took the self-shifting contribution into account by extrapolating the data [1,2] for pure H 2 .…”

Section: Collisional Lineshift Coefficients and Their Temperature Depmentioning

confidence: 99%

“…[2] for H 2 -X (X = H 2 , He, N 2 ) mixtures, introduce an empirical 'fitting law' for H 2 -H 2 O lineshift coefficients:…”

Section: Collisional Lineshift Coefficients and Their Temperature Depmentioning

confidence: 99%

“…Semiclassical and quantum calculations provide some estimates of lineshift coefficients for H 2 -H 2 and H 2 -He, whereas none is available for H 2 -H 2 O collisions since accurate intermolecular potentials for H 2 -H 2 O are presently not known. Experimentally, [1] pure H 2 (up to 1000 K) and several mixtures (pure H 2 , H 2 -He, H 2 -N 2 ) [2] have been investigated by means of inverse Raman spectroscopy (IRS) in a heatable static cell in the temperature range 300-1200 K with high spectral resolution and accuracy. These measurements allow modeling the lineshift coefficients as a function of temperature and J quantum number.…”

Section: Introductionmentioning

confidence: 99%

“…These measurements allow modeling the lineshift coefficients as a function of temperature and J quantum number. Michaut et al [2] have revealed that, whatever the perturber (H 2 , He, Ne, Ar, Xe, N 2 ), the temperature dependence of the lineshift is proportional to T 1/2 :…”

Section: Introductionmentioning

confidence: 99%

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CARS investigation of collisional shift of the hydrogen Q‐branch transitions by water at high temperatures

Vereschagin

Смирнов

et al. 2010

J Raman Spectroscopy

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A high-resolution (∼0.1 cm −1 ) spectroscopic method based on the application of a Fabry-Pérot interferometer to the spectral analysis of the coherent anti-Stokes Raman scattering (CARS) signal from an individual Raman transition was used to obtain single-shot spectra of hydrogen Q-branch transitions directly in the flame of a pulsed, high-pressure H 2 /O 2 combustion chamber. Simultaneously with the Fabry-Pérot pattern, a broadband CARS spectrum of the complete H 2 Q -branch structure was recorded in order to measure the temperature of the probe volume. During every cycle of the combustion chamber, a pressure pulse together with single-shot CARS spectra, providing information on individual line shapes and medium temperature, was recorded. On the basis of the experimental data, the temperature dependences of lineshift coefficients for several Q-branch lines of hydrogen molecules under collisions with water molecules were determined in the temperature range 2100 < T < 3500 K, and an empirical 'fitting law' for H 2 -H 2 O lineshift coefficients is proposed.

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“…[2] For mixtures of hydrogen with nitrogen and with a number of noble gases, this rule is broken, but for H 2 -H 2 and H 2 -H 2 O mixtures the linear law is valid, [2,3] and…”

Section: Collisional Lineshift Coefficients and Their Temperature Depmentioning

confidence: 99%

Section: Collisional Lineshift Coefficients and Their Temperature Depmentioning

confidence: 99%

“…[2] for H 2 -X (X = H 2 , He, N 2 ) mixtures, introduce an empirical 'fitting law' for H 2 -H 2 O lineshift coefficients:…”

Section: Collisional Lineshift Coefficients and Their Temperature Depmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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CARS investigation of collisional shift of the hydrogen Q‐branch transitions by water at high temperatures

Vereschagin

Смирнов

et al. 2010

J Raman Spectroscopy

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Raman Spectroscopy of Gases

Weber

2001

Handbook of Vibrational Spectroscopy

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The sections in this article are Introduction Spontaneous R aman Spectroscopy High‐Resolution Rotation–Vibration Spectra Use of Interferometers R aman Line Widths Intensity Alternation Supersonic Jet Expansions Vibrational R aman Spectra Scattering Cross‐Sections Resonance R aman Spectra R aman Spectroscopy under Extreme Conditions Nonlinear R aman Spectroscopy Coherent Anti‐Stokes R aman Scattering Stimulated R aman Gain or Loss Spectroscopy Photoacoustic R aman Scattering Double Resonance Techniques Line Widths and Line Shapes Time‐Domain Nonlinear Spectroscopy Wavenumber Calibration of R aman Spectra Some Applications Summary Acknowledgments

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Investigations of pure rotational transitions of H2 perturbed by He. II. High-temperature calculations and extrapolations

Dubernet

Tuckey

Jolicard

et al. 2001

The Journal of Chemical Physics

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Close-coupling calculations of broadening and shifting coefficients of Raman S0(j) lines of H2 perturbed by He are performed up to 3000 K. They are used to test two approximate methods, the quantum coupled states theory and the RB semiclassical model. They are further applied to study the use of simple functional forms for fitting and extrapolating experimental data, and some new fits of experimental broadening coefficients are given.

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FITTING LAW FOR THE DENSITY SHIFT OF Q(J) TRANSITIONS OF H2 IN H2–X (X: H2, He, N2) MIXTURES

Cited by 3 publications

References 0 publications

CARS investigation of collisional shift of the hydrogen Q‐branch transitions by water at high temperatures

CARS investigation of collisional shift of the hydrogen Q‐branch transitions by water at high temperatures

Raman Spectroscopy of Gases

Investigations of pure rotational transitions of H2 perturbed by He. II. High-temperature calculations and extrapolations

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