Measurements and theoretical calculations of N2-broadening and N2-shift coefficients in the ν2 band of CH3D

Predoi‐Cross, Adriana; Hambrook, Kyle; Brawley-Tremblay, Marco; Bouanich, Jean-Pierre; Smith, Mary Ann H.

doi:10.1016/j.jms.2005.10.003

Cited by 19 publications

(6 citation statements)

References 34 publications

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“…Within the limited data set available similar trends with K are found as for CH 3 Br. The changes in foreign gas broadening coefficients for lines with different J and K quantum numbers for symmetric tops has been investigated both empirically [14,15] and with a semi classical model assuming the top can be approximated by a linear molecule [16]. These approaches account for the general trends seen experimentally.…”

Section: Discussionmentioning

confidence: 99%

Pressure broadening coefficients of ν5 fundamental band lines of CH3I at 7μm measured by diode laser absorption spectroscopy

Hoffman

Davies

2008

Journal of Molecular Spectroscopy

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Section: Discussionmentioning

confidence: 99%

Pressure broadening coefficients of ν5 fundamental band lines of CH3I at 7μm measured by diode laser absorption spectroscopy

Hoffman

Davies

2008

Journal of Molecular Spectroscopy

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“…Also, because CO is a simple diatomic molecule, it is a useful system for evaluating theoretical profiles and for testing intermolecular potential parameters. Many papers [2][3][4][5][6][7][8][9][10][11][12][13][14] have been devoted to studies of N 2 , O 2 and air broadening of CO lines for atmospheric remote sensing applications. The He-broadening of CO transitions was also extensively studied [4,5,8,13,[15][16][17][18][19][20][21][22][23][24][25] because this case is relevant to determining the composition of interstellar molecular clouds and the atmospheres of the outer planets.…”

Section: Introductionmentioning

confidence: 99%

Spectral shapes of rovibrational lines of CO broadened by He, Ar, Kr and SF6: A test case of the Hartmann-Tran profile

Ngo

Lin

Hodges

2017

Journal of Quantitative Spectroscopy and Radiative Transfer

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High signal-to-noise ratio spectra of the (3-0) band P(1) and P(17) lines of CO broadened by He, Ar, Kr and SF 6 were measured with a frequency-stabilized cavity ring-down spectroscopy system. For each collision-partner and both lines, multiple spectra were measured over pressures spanning nearly three decades up to 130 kPa. These data were analyzed with a multispectrum fitting procedure. Line shapes were modeled using the Hartmann-Tran (HT) profile with first-order line mixing as well as several other simplified profiles. The results show that for all considered collision partners (with the exception of SF 6), the HT profile captures the measured line shapes with maximum absolute residuals that are within 0.1% of the peak absorption. In the case of SF 6 , which is the heaviest perturber investigated here, the maximum residuals for the HT profile are twice as large as for the other collision partners.

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“…[78]). In addition, we have Φ(CH3F) = 0.979 D Å 3 [97], Φ(CH3D) = 6.55 D Å 3 [99]. Table 4.20 gives the NH 3 -H 2 -broadening coefficients of Ref.…”

Section: Nh 3 Moleculementioning

confidence: 99%

“…[99], N 2 -broadening and shifting coefficients for 368 transitions (J ≤ 20, 0 ≤ K ≤ 6, ∆K = 0) in the ν 2 band at 296 K were measured (0.0248 < γ < 0.0742 cm -1 atm -1 , -0.0003 < δ < -0.0094 cm -1 atm -1 ) and compared with theoretical values obtained by the RB approach. The isotropic potential was chosen as V iso (r) = -C 6 /r 6 +C 14 /r 14 , where C 6 = 4εσ 6 and C 14 = 4εσ 14 .…”

Section: Monodeuterated Methane Ch 3 D the Collisional Broadening Of mentioning

confidence: 99%

Pressure broadening and shifting of vibrotational lines of atmospheric gases

Buldyreva¹,

Lavrentieva²,

Starikov³

2010

Collisional Line Broadening and Shifting of Atmospheric Gases

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Water vapour is one of the strongest absorbers of radiation in the Earth's atmosphere, but some other gases also play an important role in the atmospheric radiative transfer processes: carbon dioxide CO 2 , carbon monoxide CO, ozone О 3 , methane CH 4 . Minor atmospheric pollutants such as hydrogen sulphide H 2 S, methyl fluoride CH 3 F, methyl chloride CH 3 Cl, ethylene C 2 H 4 , nitric oxide NO, nitrous oxide N 2 O and nitrogen dioxide NO 2 are equally recognised for their implication in the fundamental chemical reactions occurring in the terrestrial atmosphere. As a consequence, a lot of spectroscopic studies are made for these molecules in order to obtain the line positions, intensities and widths. They are briefly summarised below, starting by asymmetric waterlike molecules of X 2 Y-type which have the same selection rules for vibrotational spectra. Vibrotational lines of asymmetric X 2 Y moleculesBetween asymmetric tops of the X 2 Y type most attention in the spectroscopic literature is paid to the H 2 S, SO 2 , O 3 and NO 2 molecules. _________________________________________________________________ A vibrotational state (v 1 v 2 v 3 ) [J K a K c ] of these molecules is characterised by three vibrational quantum numbers v 1 , v 2 , v 3 and three rotational quantum numbers J, K a , K c . In the NO 2 molecule, having an unpaired electron (total electronic spin S = 1/2), each vibrotational level is split by the spin-rotational interaction into two components (J = N ± S) denoted by + or -, and the three rotational quantum numbers are N, K a , K c . For a given set of vibrotational quantum numbers the corresponding energies are obtained by a diagonalization of the effective Hamiltonian matrix of Eq. (3.

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Measurements and theoretical calculations of N2-broadening and N2-shift coefficients in the ν2 band of CH3D

Cited by 19 publications

References 34 publications

Pressure broadening coefficients of ν5 fundamental band lines of CH3I at 7μm measured by diode laser absorption spectroscopy

Pressure broadening coefficients of ν5 fundamental band lines of CH3I at 7μm measured by diode laser absorption spectroscopy

Spectral shapes of rovibrational lines of CO broadened by He, Ar, Kr and SF6: A test case of the Hartmann-Tran profile

Pressure broadening and shifting of vibrotational lines of atmospheric gases

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