Dicke Narrowing, Pressure Dependence, and Mixing of Self-Broadened CO2 Absorption Lines in the 30013 ← 00001 Band: Measurements and Line Profile Testing

Autor: K. Yu. Osipov, V. A. Kapitanov, Yu. N. Ponomarev, A.E. Protasevich, Ya. Ya. Ponurovskii
Rok vydání: 2021
Předmět:
Zdroj: Atmospheric and Oceanic Optics. 34:381-389
ISSN: 2070-0393
1024-8560
Popis: Results of the experimental study of the pressure dependence of self-broadening and shift of six isolated CO2 absorption lines in the 1.6-μm spectral range at room temperature are presented. The measurements were carried out at a high-sensitivity high-resolution diode laser spectrometer with a signal-to-noise ratio of 3000 to 7000. To describe the experimental spectra, five line profile models VP, RP, qSDRP, qSDVP, and qSDVP + LM were used. A strong effect of weak closely spaced lines on the retrieved parameters (intensity and collisional broadening coefficient) of strong lines was found, as well as nonlinear pressure dependence of the narrowing parameter for the RP and qSDRP models. The linear pressure dependence of the parameters retrieved is shown for qSDVP + LM line profile in the pressure range from 0.001 to 1 atm.
Databáze: OpenAIRE
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