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Collisional self-broadening coefficients and probabilities of spontaneous emission of the CO2 1000–0001 transition lines

Atmospheric and Oceanic Optics volume 30, pages 311–315 (2017)Cite this article

Abstract

Using a tunable frequency-stabilized CO2 laser, the pressure dependences of unsaturated absorption coefficients (AC) are measured in pure carbon dioxide in the pressure range from 5 to 30 Torr, where the spectral line shape is described by the Voigt profile. The absorption coefficients are measured in the centers of R(8), R(22), R(34), P(22), and P(36) spectral lines of the 1000–0001 transition in the temperature range 300–700 K. By means of the least-squares method, the inverse problem is solved for the system of equations for AC at different pressures in the temperature range under study. The self-broadening coefficients \({\gamma _{C{O_2} - C{O_2}}}\) and the probabilities of spontaneous emission A ik are derived. A new formula is proposed for \({\gamma _{C{O_2} - C{O_2}}}\) (T) dependence.

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Authors and Affiliations

  1. Institute of Technical Acoustics, National Academy of Sciences of Belarus, Vitebsk, 210023, Belarus

    K. I. Arshinov & O. N. Krapivnaya

  2. Belarusian National Technical University, Minsk, 220013, Belarus

    V. V. Nevdakh

Authors
  1. K. I. Arshinov
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  2. O. N. Krapivnaya
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  3. V. V. Nevdakh
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Correspondence to K. I. Arshinov.

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Original Russian Text © K.I. Arshinov, O.N. Krapivnaya, V.V. Nevdakh, 2017, published in Optika Atmosfery i Okeana.

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Arshinov, K.I., Krapivnaya, O.N. & Nevdakh, V.V. Collisional self-broadening coefficients and probabilities of spontaneous emission of the CO2 1000–0001 transition lines. Atmos Ocean Opt 30, 311–315 (2017). https://doi.org/10.1134/S1024856017040030

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  • DOI: https://doi.org/10.1134/S1024856017040030

Keywords

  • carbon dioxide
  • absorption
  • self-broadening coefficient
  • spontaneous emission probability