The Rotational Spectrum of SO2 and the Determination of the Hyperfine Constants and Nuclear Magnetic Shielding Tensors of 33SO2 and SO17O

✍ Scribed by Holger S.P. Müller; Jam Farhoomand; Edward A. Cohen; Bethany Brupbacher-Gatehouse; Martin Schäfer; Alfred Bauder; Gisbert Winnewisser

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 187 KB
• Volume: 201
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.2000.8072

✦ Synopsis

Precise frequencies for the 1 11 -2 02 transition of 33 SO 2 and SO 17 O in natural isotopic abundance have been obtained near 12 GHz by microwave Fourier transform spectroscopy in order to yield improved hyperfine constants. Nuclear spin-rotation coupling constants have been determined experimentally for 33 SO 2 for the first time. The spin-rotation constants have been used to derive nuclear magnetic shielding parameters. These parameters are compared with values for the isoelectronic O 3 molecule. The transition mentioned above was also measured for 32 SO 2 , 34 SO 2 , SO 18 O, and vibrationally excited (v 2 ϭ 1) 32 SO 2 . For 33 SO 2 , some transitions with large hyperfine splitting were also recorded in the millimeter-wave region. Continuing our investigations of the rotational spectra of SO 2 in the submillimeter region, several transitions of SO 17 O have been recorded with the Cologne terahertz spectrometer between 540 and 840 GHz with J and K a up to 63 and 16, respectively. Transitions with high K a , up to 28, have been recorded with the JPL laser sideband spectrometer between 1.8 and 3.2 THz.