K-Dependence and temperature dependence of N2-, H2-, and He-broadening coefficients for the J=12–11 transition of acetonitrile CH3C14N located near 220.7GHz

Colmont, J.-M.; Rohart, F.; Wlodarczak, G.; Bouanich, Jean-Pierre

doi:10.1016/j.jms.2006.04.017

Cited by 22 publications

(10 citation statements)

References 56 publications

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“…As already observed for CH [3][4][5][6][7][8][9][10][11][12][13] and for other absorbing symmetric-top molecules such as CH 3 D [58], CH 3 F [59] or CH 3 CN [60], clear dependencies of collisional broadening on the quantum number K can be stated (see Fig. 3) using the qSDVP model for the He-, Ar-and Krinduced relaxation cases.…”

Section: Resultssupporting

confidence: 67%

Line-shapes and broadenings of rotational transitions of CH335Cl in collision with He, Ar and Kr

Gupta

Rohart

Margulès

et al. 2015

Journal of Quantitative Spectroscopy and Radiative Transfer

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Section: Resultssupporting

confidence: 67%

Line-shapes and broadenings of rotational transitions of CH335Cl in collision with He, Ar and Kr

Gupta

Rohart

Margulès

et al. 2015

Journal of Quantitative Spectroscopy and Radiative Transfer

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“…Unmeasured pressure shifts have been set to zero, the approximate average of the measured values. There are no measurements of the temperature dependence of the Lorentz half-width in air and only one in N 2 [308], so the default n was set to the single measured N 2 value of 0.72.…”

Section: Ch 3 Br (Molecule 40)mentioning

confidence: 99%

The HITRAN2012 molecular spectroscopic database

Rothman

Gordon

Babikov

et al. 2013

Journal of Quantitative Spectroscopy and Radiative Transfer

3,006

1,794

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“…We adopted one single value, 0.72, from the HITRAN2012 database [64] for the temperature dependence exponent of the N 2 -broadened Lorentz widths. This value is based on the measurements of the J = 12 − 11, K = 3 transition in the ground vibrational state [83].…”

Section: Pressure-broadened Half Widthsmentioning

confidence: 99%

Rotational spectroscopy as a tool to investigate interactions between vibrational polyads in symmetric top molecules: Low-lying states v8⩽2 of methyl cyanide, CH3CN

Müller

Brown

Drouin

et al. 2015

Journal of Molecular Spectroscopy

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Rotational and rovibrational spectra of methyl cyanide were recorded to analyze interactions in low-lying vibrational states and to construct line lists for radio astronomical observations in space as well as for infrared spectroscopic investigations of planetary atmospheres. The rotational spectra cover large portions of the 36−1627 GHz region. In the infrared (IR), a spectrum was recorded for this study in the region of 2ν 8 around 717 cm −1 with assignments covering 684−765 cm −1. Additional spectra in the ν 8 region were used to validate the analysis. Information on the K level structure of CH 3 CN is almost exclusively obtained from IR spectra, as are basics of the J level structure. The large amount and the high accuracy of the rotational data improves knowledge of the J level structure considerably. Moreover, since these data extend to much higher J and K quantum numbers, they allowed us to investigate for the first time in depth local interactions between these states which occur at high K values. In particular, we have detected several interactions between 8 = 1 and 2. Notably, there is a strong ∆ 8 = ±1, ∆K = 0, ∆l = ±3 Fermi resonance between 8 = 1 −1 and 8 = 2 +2 at K = 14. Pronounced effects in the spectrum are also caused by resonant ∆ 8 = ±1, ∆K = ∓2, ∆l = ±1 interactions between 8 = 1 and 2 at K = 13, l = −1/K = 11, l = 0 and at K = 15, l = +1/K = 13, l = +2. An equivalent resonant interaction occurs between K = 14 of the ground vibrational state and K = 12, l = +1 of 8 = 1 for which we present the first detailed account. A preliminary account was given in an earlier study on the ground vibrational state. Similar resonances were found for CH 3 CCH and, more recently, for CH 3 NC, warranting comparison of the results. From data pertaining to 8 = 2, we also investigated rotational interactions with 4 = 1 as well as ∆ 8 = ±1, ∆K = 0, ∆l = ±3 Fermi interactions between 8 = 2 and 3. We have derived N 2-and self-broadening coefficients for the ν 8 , 2ν 8 − ν 8 , and 2ν 8 bands from previously determined ν 4 values. Subsequently, we determined transition moments and intensities for the three IR bands.

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K-Dependence and temperature dependence of N2-, H2-, and He-broadening coefficients for the J=12–11 transition of acetonitrile CH3C14N located near 220.7GHz

Cited by 22 publications

References 56 publications

Line-shapes and broadenings of rotational transitions of CH335Cl in collision with He, Ar and Kr

Line-shapes and broadenings of rotational transitions of CH335Cl in collision with He, Ar and Kr

The HITRAN2012 molecular spectroscopic database

Rotational spectroscopy as a tool to investigate interactions between vibrational polyads in symmetric top molecules: Low-lying states v8⩽2 of methyl cyanide, CH3CN

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