Pure Rotational Spectra of SO: Rare Isotopomers in the 80-GHz to 1.1-THz Region

✍ Scribed by Th. Klaus; A.H. Saleck; S.P. Belov; G. Winnewisser; Y. Hirahara; M. Hayashi; E. Kagi; K. Kawaguchi

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 355 KB
• Volume: 180
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1996.0243

✦ Synopsis

Pure rotational spectra of rare isotopomers of sulfur monoxide, SO, have been recorded with the Cologne Terahertz Spectrometer, Germany, and the millimeter-and submillimeter-wave spectrometer at Nobeyama, Japan. In total, 176 new transitions have been measured in the X 3 S 0 electronic ground state, including the first laboratory detection of the rare isotopomer 36 SO. New lines are also reported for 33 SO and S 17 O in their vibrational ground states, and for 33 SO and S 18 O in the first excited vibrational state. A simultaneous fit of 451 transitions has led to an improved set of isotopically invariant parameters for rotation and fine structure. Hyperfine structure constants for 33 SO and S 17 O have been obtained also from the global fit, including first values for the magnetic nuclear spin-rotation interaction. These are compared to other molecules. The isotopically invariant parameters allow precise frequency predictions for the submillimeter-wave region far beyond 1 THz for all SO isotopomers, of importance to astrophysical applications.