Broadening parameters of the H₂O-He collisional system for astrophysical applications

T. M. Petrova, A. M. Solodov, A. A. Solodov, V. I. Starikov

Research output: Contribution to journal › Article

Abstract

The water vapor line broadening γ and shift δ coefficients in the ν₁ + ν₂, ν₂ + ν₃, ν₁ + ν₃, 2ν₃, 2ν₁, 2ν₂ + ν₃, and ν₁ + 2ν₂ vibrational bands were obtained from the analysis of the H₂O-He absorption spectra, recorded in the region from 5000 to 7500 cm^-1 with the spectral resolution of 0.01 cm^-1 using a Bruker IFS 125HR FTIR spectrometer. The vibrational bands 2ν₃ and ν₁ + 2ν₂ were investigated for the first time. The calculations of γ and δ were performed in the framework of the semi-classical method. The rotational contributions as well as the contributions connected with the accidental resonances were taken into account in the used H₂O-He interaction potential. The analytical representation of the broadening coefficients γ at planetary temperatures was introduced and discussed.

Original language	English
Pages (from-to)	50-58
Number of pages	9
Journal	Journal of Molecular Spectroscopy
Volume	321
DOIs	https://doi.org/10.1016/j.jms.2016.01.009
Publication status	Published - 1 Mar 2016

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Keywords

Fourier transform spectroscopy
Intermolecular potential
Line broadening and shift coefficients
Semiclassical method

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Spectroscopy
Physical and Theoretical Chemistry

Cite this

Petrova, T. M., Solodov, A. M., Solodov, A. A., & Starikov, V. I. (2016). Broadening parameters of the H₂O-He collisional system for astrophysical applications. Journal of Molecular Spectroscopy, 321, 50-58. https://doi.org/10.1016/j.jms.2016.01.009

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title = "Broadening parameters of the H2O-He collisional system for astrophysical applications",

abstract = "The water vapor line broadening γ and shift δ coefficients in the ν1 + ν2, ν2 + ν3, ν1 + ν3, 2ν3, 2ν1, 2ν2 + ν3, and ν1 + 2ν2 vibrational bands were obtained from the analysis of the H2O-He absorption spectra, recorded in the region from 5000 to 7500 cm-1 with the spectral resolution of 0.01 cm-1 using a Bruker IFS 125HR FTIR spectrometer. The vibrational bands 2ν3 and ν1 + 2ν2 were investigated for the first time. The calculations of γ and δ were performed in the framework of the semi-classical method. The rotational contributions as well as the contributions connected with the accidental resonances were taken into account in the used H2O-He interaction potential. The analytical representation of the broadening coefficients γ at planetary temperatures was introduced and discussed.",

keywords = "Fourier transform spectroscopy, Intermolecular potential, Line broadening and shift coefficients, Semiclassical method",

author = "Petrova, {T. M.} and Solodov, {A. M.} and Solodov, {A. A.} and Starikov, {V. I.}",

year = "2016",

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AU - Petrova, T. M.

AU - Solodov, A. M.

AU - Solodov, A. A.

AU - Starikov, V. I.

PY - 2016/3/1

Y1 - 2016/3/1

N2 - The water vapor line broadening γ and shift δ coefficients in the ν1 + ν2, ν2 + ν3, ν1 + ν3, 2ν3, 2ν1, 2ν2 + ν3, and ν1 + 2ν2 vibrational bands were obtained from the analysis of the H2O-He absorption spectra, recorded in the region from 5000 to 7500 cm-1 with the spectral resolution of 0.01 cm-1 using a Bruker IFS 125HR FTIR spectrometer. The vibrational bands 2ν3 and ν1 + 2ν2 were investigated for the first time. The calculations of γ and δ were performed in the framework of the semi-classical method. The rotational contributions as well as the contributions connected with the accidental resonances were taken into account in the used H2O-He interaction potential. The analytical representation of the broadening coefficients γ at planetary temperatures was introduced and discussed.

AB - The water vapor line broadening γ and shift δ coefficients in the ν1 + ν2, ν2 + ν3, ν1 + ν3, 2ν3, 2ν1, 2ν2 + ν3, and ν1 + 2ν2 vibrational bands were obtained from the analysis of the H2O-He absorption spectra, recorded in the region from 5000 to 7500 cm-1 with the spectral resolution of 0.01 cm-1 using a Bruker IFS 125HR FTIR spectrometer. The vibrational bands 2ν3 and ν1 + 2ν2 were investigated for the first time. The calculations of γ and δ were performed in the framework of the semi-classical method. The rotational contributions as well as the contributions connected with the accidental resonances were taken into account in the used H2O-He interaction potential. The analytical representation of the broadening coefficients γ at planetary temperatures was introduced and discussed.

KW - Fourier transform spectroscopy

KW - Intermolecular potential

KW - Line broadening and shift coefficients

KW - Semiclassical method

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Access to Document

10.1016/j.jms.2016.01.009