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 HΓ·, D~-, HN~-, H3 O+ and ArH +, were detected in the 1900-3600 cm -1 region using difference frequency and diode
Tunable infrared and far-infrared direct absorption spectroscopy of molecular ions in a supersonic jet expansion
β Scribed by Georg Hilpert; Harold Linnartz; Martina Havenith; J.J. ter Meulen; W.Leo Meerts
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 471 KB
- Volume
- 219
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
A newly designed two-dimensional corona-excited slit nozzle discharge is described and its first applications for direct absorption spectroscopy of molecular ions in a supersonic expansion in the infrared (NO+ ) and far-infrared (N,H+ ). The results are discussed and it will be shown that under the conditions described, for NrH+ linewidths of 750 kHz and rotational temperatures of 12 K can be achieved.
π SIMILAR VOLUMES
The lowest E bending vibration (02'0) of Ar-H"CI has been observed near 23.6 cm-' from P(23) to R(17), in a continuous planar jet expansion using a tunable far-infrared laser. A least-squares analysis has been performed to determine the centrifugal distortion constants for the ground and excited sta
Ultra-sensitive tunable difference frequency IR absorption spectroscopy in a slit supersonic jet has been used to observe sub-Doppler spectra of Ar-HF in the (lO\*O) HF stretch and (11'0) HF stretch plus van der Waals bend modes. Linewidths yield a lower limit of 3 X lo-' s for the predissociation l
A direct absorption microwave and millimeterwave spectrometer capable of observing the rotational transitions of weaklybound complexes formed in a planar supersonic nozzle has been constructed. Both the technique for observing weakly-bound complexes and its initial application to Ar-HCN and (HCN)r a