Broadening parameters of the H<sub>2</sub>O-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.

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

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

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10.1016/j.jms.2016.01.009

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@article{ffc7376d38a441b6b4ac277d401a9073,

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",

month = mar,

day = "1",

doi = "10.1016/j.jms.2016.01.009",

language = "English",

volume = "321",

pages = "50--58",

journal = "Journal of Molecular Spectroscopy",

issn = "0022-2852",

publisher = "Academic Press Inc.",

}

TY - JOUR

T1 - Broadening parameters of the H2O-He collisional system for astrophysical applications

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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U2 - 10.1016/j.jms.2016.01.009

DO - 10.1016/j.jms.2016.01.009

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VL - 321

SP - 50

EP - 58

JO - Journal of Molecular Spectroscopy

JF - Journal of Molecular Spectroscopy

SN - 0022-2852

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