Regular Article
Sub-Millimeter-Wave Spectroscopy of the Ar·H+3and Ar·D+3Ionic Complexes

https://doi.org/10.1006/jmsp.1998.7564Get rights and content

Abstract

An investigation of the sub-millimeter-wave spectra of the ionic complexes Ar·H+3and Ar·D+3is presented. These complexes were produced in a negative glow electric discharge, in mixtures of argon with either H2or D2. About 80 new transitions were assigned in the 485–680 GHz frequency range using a sub-millimeter-wave spectrometer built with Russian made backward wave oscillators (BWO) sources. These measurements enabled us to observe the firstKa= 2 transitions for Ar·H+3and the firstKa= 3 transitions for Ar·D+3. Analyses of the line frequencies were carried out using an IAM-like approach, which accounts for the large amplitude internal rotation motion displayed by both species. Insights into the geometry of the intermediate configuration for this large amplitude motion were gained.

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I. Nenner

1

Permanent address: J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 182 23 Prague 8, Czech Republic.

2

Permanent address: Applied Physics Institute of Russian Academy of Sciences, 46 Uljanova Street, 603 600 Nizhnii Novgorod, Russia.

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