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Published on: May 29, 2014
Accurate Frequency Determination of Vibration-Rotation and Rotational Transitions of SiH
José L Doménech1, Stephan Schlemmer2, Oskar Asvany2
1Instituto de Estructura de la Materia (IEM-CSIC), Serrano 123, E28006 Madrid, Spain.
Abstract:
The fundamental 28SiH+ ion has been characterized in a collaborative work, utilizing a hollow-cathode-discharge laser-spectrometer and a cryogenic ion trap spectrometer. Twenty-three vibration-rotation transitions around 4.75 microm have been detected with high accuracy. This has facilitated the first direct measurement of the pure rotational transition J = 1 ← 0 at 453056.3632(4) MHz in the trap spectrometer. The measured and accurately predicted transitions enable the search for this ion in space with IR and sub-mm telescopes.
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