Terahertz spectroscopy of hydrogen sulfide

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• 作者：Ala'a A.A. Azzam ; Sergei N. Yurchenko ; Jonathan Tennyson ; Marie-Aline Martin-Drumel ; Olivier Pirali
• 关键词：Hydrogen sulfide ; Line assignments ; Atmospheric physics ; Planetary atmospheres
• 刊名：Journal of Quantitative Spectroscopy and Radiative Transfer
• 出版年：2013
• 出版时间：November, 2013
• 年：2013
• 卷：130
• 期：Complete
• 页码：341-351
• 全文大小：816 K

文摘

Pure rotational transitions of hydrogen sulfide (H₂S) in its ground and first excited vibrational states have been recorded at room temperature. The spectrum comprises an average of 1020 scans at 0.005 cm^?1 resolution recorded in the region 45-360 cm^?1 (1.4 to 10.5 THz) with a globar continuum source using a Fourier transform spectrometer located at the AILES beamline of the SOLEIL synchrotron. Over 2400 rotational lines have been detected belonging to ground vibrational state transitions of the four isotopologues H₂³²S, H₂³³S, H₂³⁴S, and H₂³⁶S observed in natural abundance. 65 %  of these lines are recorded and assigned for the first time, sampling levels as high as J=26 and K_a=17 for H₂³²S. 320 pure rotational transitions of H₂³²S in its first excited bending vibrational state are recorded and analysed for the first time and 86 transitions for H₂³⁴S, where some of these transitions belong to new experimental energy levels. Rotational constants have been fitted for all the isotopologues in both vibrational states using a standard effective Hamiltonian approach. Comprehensive comparisons are made with previously available data as well as the data available in HITRAN, CDMS, and JPL databases. The 91 transitions assigned to H₂³⁶S give the first proper characterization of its pure rotational spectrum.