Vibrational relaxation study of N2O in CCl4 and SF6 using overtone bands

Soussen-Jacob, J.; Breuillard, C.; Bessiere, J.; Tsakiris, J.; Vincent‐Geisse, J.

doi:10.1080/00268978200101381

Cited by 6 publications

(2 citation statements)

References 15 publications

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“…7,8 The overtone spectra ͑ϭ2 transition͒ for some molecules have been measured by IR or nonresonant Raman spectroscopy in the frequency domain, and it is found that the ratio of the bandwidth of the overtone and fundamental is smaller than 4 for many molecules. [9][10][11] The progressions more than ϭ10 were measured for iodine 12 and methyl iodide 13 by the resonance Raman spectroscopy. The bandwidths appeared proportional to 2 for small , and linear to for large .…”

Section: ͑6͒mentioning

confidence: 99%

Vibrational overtone dephasing in liquids under the influence of non-Gaussian noise

Yamaguchi

2000

The Journal of Chemical Physics

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We have calculated the vibrational overtone dephasing rates of an oscillator that is subject to uncorrelated, impulsive, and strong collisions. We have assumed the Poisson statistics for binary collisions, and not truncated the cumulant expansion at the second order. The decay of the response function is always exponential, and the dephasing rate shows subquadratic dependence on the vibrational quantum number ͑͒. The dephasing rate asymptotically converges to the collision frequency at the largeor strong collision limits. We have succeeded in reproducing the experimental results on chloroform ͓K. Tominaga and K. Yoshihara, J. Phys. Chem. A 102, 4222 ͑1998͔͒ and those on methyl iodide ͓A. B. Myers and F. Markel, Chem. Phys. 149, 21 ͑1990͔͒ by adjusting the collision frequency and the strength of the collision.

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Section: ͑6͒mentioning

confidence: 99%

Vibrational overtone dephasing in liquids under the influence of non-Gaussian noise

Yamaguchi

2000

The Journal of Chemical Physics

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“…The overtone vibrational spectra were observed by infrared absorption and nonresonant Raman spectroscopy. − In these experiments the spectral widths of the first overtones (Δν( v =2)) of simple molecules such as CH 3 CN or N 2 O were compared with that of the fundamentals (Δν( v =1)), and the ratio of Δν( v =2)/Δν( v =1) was analyzed by the stochastic theory . It was found that this ratio often lies between 2 and 3.…”

Section: Introductionmentioning

confidence: 99%

Overtone Vibrational Dephasing of Chloroform Studied by Higher-Order Nonlinear Spectroscopy

Tominaga

Yoshihara

1998

J. Phys. Chem. A

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Vibrational dephasing of the overtone bands of chloroform and its deuterated analogue has been studied by higher-order nonlinear spectroscopy. The overtone signals of v = 2 and 3 are based on the fifth- and seventh-order optical nonlinearity, respectively. The overtone vibrational dephasing signals as well as the fundamental ones are represented well by a single-exponential function. These dephasing signals are not explained by the stochastic theory with a time correlation function having a Gaussian or exponential character. Effects of resonant transfer and population relaxation are found not to be important for the deviation from the theoretical prediction. It is suggested that polyatomic natures of the molecule such as off-diagonal anharmonicity or coupling with combination bands may be responsible for this deviation.

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