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High-Resolution FTIR Spectroscopy Using a Jet: Sampling the Rovibrational Spectrum of12CH4

✍ Scribed by Robert Georges; Michel Herman; Jean-Claude Hilico; Olivier Robert

Publisher: Elsevier Science
Year: 1998
Tongue: English
Weight: 195 KB
Volume: 187
Category: Article
ISSN: 0022-2852
DOI: 10.1006/jmsp.1997.7462

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✦ Synopsis

We have recorded high-resolution absorption spectra of 12 CH 4 cooled in a jet, using a Fourier transform interferometer. The expected nuclear spin symmetry conservation in the jet is exhibited from data recorded around 3000 cm 01 showing the relative intensity of the lines starting from the JЉ Å 2 para and ortho levels. Spectra recorded around 4300 cm 01 are used to validate existing rovibrational parameters. Spectra recorded around 6000 cm 01 allow new rovibrational assignments to be performed in the N Å 4 polyad. In particular, lines in the n 1 / n 3 band are identified for the first time.

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