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Degenerate four-wave mixing spectroscopy of the (glyoxal)2 van der Waals complex

✍ Scribed by P. DeRose; H.L. Dai; P.Y. Cheng

Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 716 KB
Volume: 220
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(94)00172-3

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✦ Synopsis

Glyoxal dimer generated in a supersonic expansion can be detected through the relatively weak glyoxal A+8 transition by using degenerate four-wave mixing spectroscopy. A detection limit on the order of 10" molecules/cm3 is obtained. The spectrum can be simulated with a simple N&r" (n=2-4) intensity dependence, where No is the ground-state population and u is the absorption cross section. Inclusion of nondegenerate grating scattering effects due to congestion of transitions within the laser bandwidth improves the spectral simulation. The rotational constants obtained from a rotational band contour analysis are reported for the dimer.

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