Abstract
The absorption spectrum of the H2S molecule is recorded with high spectral resolution (0.00016 cm−1) and threshold sensitivity (∼1E-26 cm/molec.) in the 6227.506–6236.844 and 6244.188–6245.348 cm−1 spectral ranges at room temperature and pressures of 0.001–0.06 atm for the first time. The measurements were performed at the General Physics Institute, Russian Academy of Sciences, at a high-sensitivity high-resolution diode laser spectrometer with a signal-to-noise ratio of more than 10 000. Line center shift coefficients Δ0/P and collisional widths Γ2/P are estimated for the first time; new spectral lines have been recorded. The experimentally estimated line centers differ from the calculated positions of line centers in the HITRAN database by Δν = (νH − νexp) × 103 cm−1 ≈ 0.001–0.01 cm−1. The intensity estimates coincide much worse, the relative differences 100% × (SH − Sexp)/SH amount to tens of percent; the intensities of five lines differ by hundreds of percent or more.
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ACKNOWLEDGMENTS
We are grateful to O.V. Naumenko and S.N. Mikhailenko for useful consultations, as well as to the staff of St. Petersburg State University, Institute of Applied Physics, Russian Academy of Sciences, and the Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences, for the possibility of working with W@DIS distributed information system (https://wadis.saga.iao.ru), which provided significant assistance in systematizing and estimating the reliability of literature molecular spectroscopy data.
Funding
The work was supported by the Ministry of Science and Higher Education of the Russian Federation (V.E. Zuev Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences).
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Kapitanov, V.A., Ponurovskii, Y.Y. Absorption Spectrum of Pure H2S in the 6227.506–6236.844 and 6244.188–6245.348 cm−1 Ranges: Absorption Line Positions and Intensities, Self-Broadening and Self-Shift Coefficients. Atmos Ocean Opt 37, 151–161 (2024). https://doi.org/10.1134/S1024856024700180
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DOI: https://doi.org/10.1134/S1024856024700180