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

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

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    9 Citations (Scopus)

    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 languageEnglish
    Pages (from-to)50-58
    Number of pages9
    JournalJournal of Molecular Spectroscopy
    Volume321
    DOIs
    Publication statusPublished - 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

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