Multinozzle supersonic expansion for Fourier transform absorption spectroscopy

✍ Scribed by R. Georges; G. Durry; M. Bach; R. Pétrisse; R. Jost; M. Herman

• Book ID: 103031384
• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 397 KB
• Volume: 246
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(95)01161-4

✦ Synopsis

A new supersonic expansion made of several, up to 31 aligned nozzles, on top of a set of powerful Roots blowers has been built. Adequate optics allowed the recording of infrared absorption spectra in a cell with a Fourier transform interferometer, at high spectral resolution. The system was tested with N20, between 2000 and 4800 cm-t. The v~ + 2v 2 + u 3 combination band, estimated to be some 10000 times weaker than the u: fundamental, could be observed among all t.~e other expected bands, thus setting a limit for the sensitivity of the system. The formation of large N20 clusters was observed.