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

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 3 +, D 2H +, D 3 +, HN 2 +, H 3O + and ArH +, were detected in the 1900–3600 cm −1 region using difference frequency an...

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Published inChemical physics letters Vol. 242; no. 1; pp. 126 - 131
Main Authors Yunjie, Xu, Fukushima, M., Amano, T., McKellar, A.R.W.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 11.08.1995
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Summary: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 3 +, D 2H +, D 3 +, HN 2 +, H 3O + 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.
ISSN:0009-2614
1873-4448
DOI:10.1016/0009-2614(95)00720-O