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The a1Δg→X3Σ−g magnetic dipole transition of S2

✍ Scribed by K.D. Setzer; M. Kalb; E.H. Fink

Publisher: Elsevier Science
Year: 2003
Tongue: English
Weight: 194 KB
Volume: 221
Category: Article
ISSN: 0022-2852
DOI: 10.1016/s0022-2852(03)00174-7

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✦ Synopsis

Emission spectra of the 0-0 band of the a 1 D g ! X 3 R À g magnetic dipole transition of S 2 have been observed in the near-infrared spectral region near 4400 cm À1 . The S 2 molecules were generated in a fast-flow system by passing S x or S 2 Cl 2 vapor in Ar carrier gas through a microwave discharge and were excited by electronic-to-electronic energy transfer from metastable singlet oxygen O 2 (a 1 D g ). Medium-resolution spectra of the b

were measured with a Fouriertransform spectrometer. By comparing the bandshape of the 0-0 band of the a ! X system with a computer simulation calculated with literature data of the rotational constants of the X and a states, the origin of the 0-0 band was determined to be m 0 ¼ 4394:25 AE 0:2 cm À1 .

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