Calculation of the relaxation parameters of overlapping lines of the ammonia molecule pressure broadened by argon and helium

Abstract

Broadening coefficients γ and interference coefficients ξ are calculated for different bands of the ammonia molecule in the case of line broadening by the pressure of argon and helium. A model intermolecular potential is used. It is shown that taking into account the interference effect changes the calculated values of γ, which suggests that the model potential parameters should be redetermined. The vibrational dependence of coefficients ξ is analyzed, and they are compared to coefficients ξ calculated for the same lines of the ammonia molecule pressure broadened by H₂, O ₂, N₂, and NH₃.

Original language	English
Pages (from-to)	15-24
Number of pages	10
Journal	Optics and Spectroscopy (English translation of Optika i Spektroskopiya)
Volume	114
Issue number	1
DOIs	https://doi.org/10.1134/S0030400X13010244
Publication status	Published - Jan 2013

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics

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10.1134/S0030400X13010244

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Starikov, V. I. (2013). Calculation of the relaxation parameters of overlapping lines of the ammonia molecule pressure broadened by argon and helium. Optics and Spectroscopy (English translation of Optika i Spektroskopiya), 114(1), 15-24. https://doi.org/10.1134/S0030400X13010244

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AB - Broadening coefficients γ and interference coefficients ξ are calculated for different bands of the ammonia molecule in the case of line broadening by the pressure of argon and helium. A model intermolecular potential is used. It is shown that taking into account the interference effect changes the calculated values of γ, which suggests that the model potential parameters should be redetermined. The vibrational dependence of coefficients ξ is analyzed, and they are compared to coefficients ξ calculated for the same lines of the ammonia molecule pressure broadened by H2, O 2, N2, and NH3.

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