Vol. 35, issue 11, article # 3

Kapitanov V. A., Ponurovskii Ya. Ya., Osipov K. Yu., Ponomarev Yu. N. Pure NH3 spectrum measurements and analysis of overlapping absorption lines in 6611.6–6613.5 cm-1 region. // Optika Atmosfery i Okeana. 2022. V. 35. No. 11. P. 896–902. DOI: 10.15372/AOO20221103 [in Russian].
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The results of experimental studies of absorption spectra of pure NH3 at room temperature in the ranges 6604.3–6606.3 and 6611.6–6613.5 cm-1 and pressure of up to 0.04 atm are presented. The measurements were carried out at the Department of Diode Laser Spectroscopy of the Institute of General Physics at a high-sensitivity high-resolution diode laser spectrometer with a signal-to-noise ratio of ~ 1400. The spectra were analyzed using a Voigt contour. The results of retrieving the parameters of spectral absorption lines are presented: the positions of centers, intensities, and coefficients of collisional self-broadening and shifts. A comparison was made with the parameters from HITRAN database. A two-fold difference between the measured intensities of a number of lines and the HITRAN values was found.


NH3, diode laser spectroscopy, spectral line, lineshape, line parameters, HITRAN


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