Terahertz Rotational Spectrum of H 2S

The rotational transition frequencies of H 2S in the terahertz region were measured precisely up to 1.08 THz by a BWO-based scanning spectrometer at Cologne, Germany, and up to 2.56 THz by a laser sideband spectrometer at Lille, France. The data obtained were analyzed together with the available mmW...

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Veröffentlicht in:Journal of molecular spectroscopy 1995, Vol.173 (2), p.380-390
Hauptverfasser: Belov, S.P., Yamada, K.M.T., Winnewisser, G., Poteau, L., Bocquet, R., Demaison, J., Polyansky, O., Tretyakov, M.Y.
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Sprache:eng
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Zusammenfassung:The rotational transition frequencies of H 2S in the terahertz region were measured precisely up to 1.08 THz by a BWO-based scanning spectrometer at Cologne, Germany, and up to 2.56 THz by a laser sideband spectrometer at Lille, France. The data obtained were analyzed together with the available mmW, sub-mmW, and FIR data using the Watson-type Hamiltonian with the power series expansion of 35 parameters up to J 10 terms and with the Padé approximation of 24 parameters up to J 8 terms. The results of the two different fits are compared and discussed. The present measurements are compared with those obtained with a FTIR spectrometer at its low-frequency limit, for the purpose of providing H 2S lines in the terahertz region as an absolute calibrator for FIR FT spectroscopy.
ISSN:0022-2852
1096-083X
DOI:10.1006/jmsp.1995.1242