Pressure-induced line mixing in the ν4 band of NH3 perturbed by O2 and self-perturbed

Nouri, S.; Mabrouk, K. Ben; Chelin, P.; Aroui, H.; Orphal, J.

doi:10.1016/j.jms.2009.09.005

Cited by 2 publications

(2 citation statements)

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“…Reproduced with permission. Recent results for shifting coefficients and line-mixing parameters for the NH 3 molecule at room temperature are given in Refs [83,[86][87][88][89][90][91]. In Ref.…”

Section: Nh 3 Moleculementioning

confidence: 99%

“…The most important for the Earth's atmosphere cases of NH 3 line broadening by N 2 , O 2 , air and CO 2 in various bands were considered in Refs[87][88][89][91][92][93][94][95][96].Table 4.25 contains empirical [92-94] N 2 -, O 2 -, air-and CO 2 -broadening coefficients for the ν 4 band (theoretical values of Ref. [95] marked by an asterisk are given if experimental values are not available).…”

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confidence: 99%

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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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