Terahertz Rotational Spectrum of H2S

✍ Scribed by S.P. Belov; K.M.T. Yamada; G. Winnewisser; L. Poteau; R. Bocquet; J. Demaison; O. Polyansky; M.Y. Tretyakov

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 541 KB
• Volume: 173
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1995.1242

✦ Synopsis

The rotational transition frequencies of (\mathrm{H}{2} \mathrm{~S}) in the terahertz region were measured precisely up to (1.08 \mathrm{THz}) by a BWO-based scanning spectrometer at Cologne, Germany, and up to 2.56 (\mathrm{THz}) by a laser sideband spectrometer at Lille, France. The data obtained were analyzed together with the available (\mathrm{mmW}), sub- (\mathrm{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 Pade 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 lowfrequency limit, for the purpose of providing (\mathrm{H}{2} \mathrm{~S}) lines in the terahertz region as an absolute calibrator for FIR FT spectroscopy. C 1995 Academic Press, Inc.