Abstract
We report some appilcatlons of the techniques of laser spectroscopy of large molecules seeded in centrosymmetric supersonic expanslons and in planar supersonlc expansions of rare gases for the IdentIHcatlon of large organlc molecules, for the sensitive detection of minor amounts of organlc moiecules, and for lsotoplc analysts. Laser-lnduced fluorescence and energy-resolved emission in jets are useful for hlgh-resoiutlon (<3 cm-’) chemical analysts and for Isotopic analysis. The utilization of planar supersonic expansions for the sensltlve detection of minor traces of organic lmpurlties allows for the detection of fluorescent large molecules whose vapor pressure at 200 OC exceeds lo-’ torr and for detection of impurities at concentrations exeeding 1 ppm.
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