Vibration rotation Raman spectroscopy of gas media

Buldakov, Mikhail A.; Ippolitov, I. I.; Korolev, B. V.; Matrosov, I. I.; Cheglokov, A. E.; Cherepanov, Victor N.; Makushkin, Yu. S.; Ulenikov, O.N.

doi:10.1016/0584-8539(95)01631-7

Cited by 26 publications

(10 citation statements)

References 49 publications

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“…The factor gives only a small deviation from unity; 1.3 × 10 −3 at the highest J ( J = 18), which corresponds to the +155 cm −1 (Stokes) and the −139 cm −1 (anti‐Stokes) transitions. We have also calculated the same correction factors from the recently reported inter‐atomic potential and the polarizabitiy derivatives . The results show good agreement with the values listed in Table (only 1% difference).…”

Section: Theory Of Rotational Raman Intensities Of Diatomic Moleculessupporting

confidence: 67%

Accurate intensity calibration for low wavenumber (−150 to 150 cm⁻¹) Raman spectroscopy using the pure rotational spectrum of N₂

Okajima

Hamaguchi

2015

J Raman Spectroscopy

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We report on an accurate intensity calibration method for low wavenumber Raman spectroscopy. It uses the rotational Raman spectrum of N 2 . The intensity distributions in the rotational Raman spectra of diatomic molecules are theoretically well established. They can be used as primary intensity standards for intensity calibration. The intensity ratios of the Stokes and anti-Stokes transitions originating from the same rotational levels are not affected by thermal population. Taking the effect of rotation-vibration interactions appropriately into account, we are able to calculate these intensity ratios theoretically. The comparison between the observed and calculated ratios of the N 2 pure rotational spectrum provides an accurate relative sensitivity curve (error~5 × 10 À4 ) in the wavenumber region of À150 to 150 cm À1 . We determine the temperature of water solely from the low wavenumber Raman spectra, using a thus calibrated spectrometer. The Raman temperature shows an excellent agreement with the thermocouple temperature, with only 0.5 K difference. The present calibration technique will be highly useful in many applications of low wavenumber quantitative Raman spectroscopy.

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Section: Theory Of Rotational Raman Intensities Of Diatomic Moleculessupporting

confidence: 67%

Accurate intensity calibration for low wavenumber (−150 to 150 cm⁻¹) Raman spectroscopy using the pure rotational spectrum of N₂

Okajima

Hamaguchi

2015

J Raman Spectroscopy

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“…Tables III and IV present the long-range multipolar coefficients at the first (electrostatic) e vibration rotation Raman spectroscopy [40] f pressure-induced far-infrared spectrum [41] g depolarization ratios [42] TABLE III. Long-range non-zero M La M ′ La V elec 52m0 electrostatic coefficients (in atomic units, see Eq.…”

Section: B Asymptotic Pess: Results and Discussionmentioning

confidence: 99%

Long-range interactions in the ozone molecule: Spectroscopic and dynamical points of view

Lepers

Bussery‐Honvault

Dulieu

2012

The Journal of Chemical Physics

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Using the multipolar expansion of the electrostatic energy, we have characterized the asymptotic interactions between an oxygen atom O( 3 P ) and an oxygen molecule O 2 ( 3 Σ − g ), both in their electronic ground state. We have calculated the interaction energy induced by the permanent electric quadrupoles of O and O 2 and the van der Waals energy. On one hand we determined the 27 electronic potential energy surfaces including spin-orbit connected to the O(On the other hand we computed the potential energy curves characterizing the interaction between O( 3 P ) and a O 2 ( 3 Σ − g ) molecule in its lowest vibrational level and in a low rotational level. Such curves are found adiabatic to a good approximation, namely they are only weakly coupled to each other. These results represent a first step for modeling the spectroscopy of ozone bound levels close to the dissociation limit, as well as the low energy collisions between O and O 2 thus complementing the knowledge relevant for the ozone formation

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“…Their calculation for hydrogen was detailed elsewhere 16. Following the same prescriptions, the case of nitrogen, oxygen, and carbon monoxide had to be treated by using the available theoretical models developed by different authors who investigated the polarizability as a function of the internuclear distance (N 2 ,27 O 2 ,28 CO,29) and, in order to double‐check the final result of F iso ( J ), a comparison was made with the independent calculations of the Q‐branch HW factor carried out by Buldakov et al for nitrogen and oxygen 30. The comparison did not show any meaningful deviation and we can conclude that, for all appearances, the result of Fig.…”

Section: Hw Factors For Q‐branch Cars Spectra Of Diatomicsmentioning

confidence: 99%

Herman–Wallis correction in vibrational CARS of oxygen

Marrocco

2011

J Raman Spectroscopy

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Light molecules are subject to vibration-rotation (VR) interaction, which implies corrections to the rigid rotor approximation and, in particular, corrections to spectral line intensities are related to the so-called Herman-Wallis (HW) factor. This problem is outlined here for the spectral response of some medium-weight diatomics in the gas phase and probed by means of vibrational coherent anti-Stokes Raman scattering (CARS) used for diagnostic reasons in combustion science. However, different from other works on this subject, we specialized our analysis to oxygen and, since the peculiarity of its anti-bonding molecular orbital, we find that the VR coupling is responsible for deviations that compete with the effect of Raman line widths typical of collisional environments of hot gases at room pressure. The HW correction is ultimately demonstrated to affect O 2 CARS thermometry in such a manner that the accuracy for measurements at high temperatures can be improved.

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Vibration rotation Raman spectroscopy of gas media

Cited by 26 publications

References 49 publications

Accurate intensity calibration for low wavenumber (−150 to 150 cm⁻¹) Raman spectroscopy using the pure rotational spectrum of N₂

Accurate intensity calibration for low wavenumber (−150 to 150 cm⁻¹) Raman spectroscopy using the pure rotational spectrum of N₂

Long-range interactions in the ozone molecule: Spectroscopic and dynamical points of view

Herman–Wallis correction in vibrational CARS of oxygen

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Vibration rotation Raman spectroscopy of gas media

Cited by 26 publications

References 49 publications

Accurate intensity calibration for low wavenumber (−150 to 150 cm−1) Raman spectroscopy using the pure rotational spectrum of N2

Accurate intensity calibration for low wavenumber (−150 to 150 cm−1) Raman spectroscopy using the pure rotational spectrum of N2

Long-range interactions in the ozone molecule: Spectroscopic and dynamical points of view

Herman–Wallis correction in vibrational CARS of oxygen

Contact Info

Product

Resources

About

Accurate intensity calibration for low wavenumber (−150 to 150 cm⁻¹) Raman spectroscopy using the pure rotational spectrum of N₂

Accurate intensity calibration for low wavenumber (−150 to 150 cm⁻¹) Raman spectroscopy using the pure rotational spectrum of N₂