✦ LIBER ✦

Infrared absorption spectroscopy of molecular ions in a corona-discharge slit expansion

✍ Scribed by Xu Yunjie; M. Fukushima; T. Amano; A.R.W. McKellar

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 431 KB
Volume: 242
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(95)00720-o

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✦ Synopsis

A new corona slit nozzle has been constructed to study, by means of direct infrared absorption, molecular ions generated in a continuous supersonic expansion. Spectra of the ions H~-, D2 H÷, D~-, HN~-, H3 O+ and ArH +, were detected in the 1900-3600 cm -1 region using difference frequency and diode laser sources. The new jet source gives a significant improvement in signal-to-noise ratio and a reduction in rotational temperature compared to our previously reported hollow-cathode jet discharge source. The effective rotational and translational temperatures were in the ranges 33-93 and 50-100 K, respectively. The experimental factors influencing the performance of the source are discussed.

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