Resonance functions in the theory of collisional broadening of molecule spectral lines at low temperatures

V. I. Starikov

    Research output: Contribution to journalArticle

    Abstract

    Eleven resonance functions are calculated in the exact trajectory model, which can be used for calculation of broadening coefficients γ of molecular lines during interactions with atoms of inert gases at very low temperatures. These functions correspond to the atom-atom potential and the potential V(R, θ) written in terms of Legendre polynomials. The functions are represented in analytical form. The broadening coefficients γ are calculated for absorption lines of CO perturbed by He and Ar at temperatures T from 300 to 2 K using the potential V(R, θ). It is shown that the dependence γ(T) for low temperatures T is determined by the potential well depth. For the CO–He system, a comparison with the experimental data is performed.

    Original languageEnglish
    Pages (from-to)316-323
    Number of pages8
    JournalAtmospheric and Oceanic Optics
    Volume30
    Issue number4
    DOIs
    Publication statusPublished - 1 Jul 2017

    Keywords

    • collisional broadening
    • low temperatures
    • resonance functions

    ASJC Scopus subject areas

    • Oceanography
    • Atomic and Molecular Physics, and Optics
    • Earth-Surface Processes
    • Atmospheric Science

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