Vibrational dependence of an intermolecular potential for H2O-He system

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

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    29 Citations (Scopus)

    Abstract

    The intermolecular interaction potential, taken as the sum of pair potentials which, in turn, were modeled by the Lennard-Jones potential has been determined by means of nonlinear least squares fitting its parameters to the experimental data on the lines broadening (γ) and shift (δ) coefficients. The data on γ and δ for nine vibration bands ν1, ν3, 2ν2, ν12, ν23, 2ν1, ν13, 2ν23 and ν123 have been obtained from the analysis of the H2O-He absorption spectra, recorded from 3000 to 9000cm-1 with help of IFS 125HR Fourier spectrometer at room temperature, spectral resolution of 0.01cm-1 and in wide pressure range of He. Additionally we use literature data for rotational band (~180GHz) and ν2 band (1850-2140cm-1). The vibrational and rotational dependence of the potential parameters as well as the temperature dependence of the calculated lines broadening coefficients have been demonstrated.

    Original languageEnglish
    Pages (from-to)241-253
    Number of pages13
    JournalJournal of Quantitative Spectroscopy and Radiative Transfer
    Volume129
    DOIs
    Publication statusPublished - Nov 2013

    Keywords

    • Intermolecular potential
    • Line broadening and shift coefficients
    • Semi-classical method

    ASJC Scopus subject areas

    • Spectroscopy
    • Atomic and Molecular Physics, and Optics
    • Radiation

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