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Proceedings Paper

High Resolution Molecular Spectroscopy In The Wavelength Region From 1 mm to 0.1 mm
Author(s): R. Wattenbach; R. Nowak; R. Densing; H.-P. Roser; S. A. Salito; R. Behn
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Paper Abstract

Spectroscopy in the submillimeter wavelength region (1 mm to 0.1 mm) has been realised for about 20 years. This spectral region is important for molecular physics, because sub-millimeter rotational transitions of light molecules such as CO, 03, OH et al. have exceptionally high absorption coefficients in the order of 10-4 cm-1 or higher. The first rotational transitions of many high molecules, for example OH, NH3, CH, are found at sub-millimeter wavelength. In spite of many advantages of other spectroscopic methods such as microwave absorption or spectroscopy with Fourier and Michelson interferometers, the sub-millimeter heterodyne spectroscopy has the advantage of high resolution. Line profiles could be resolved and lines can be detected in absorption or in emission. Frequency measurements of K-splitting from asymmetric molecules yield new determinations of molecular constants.

Paper Details

Date Published: 21 April 1986
PDF: 7 pages
Proc. SPIE 0598, Instrumentation for Submillimeter Spectroscopy, (21 April 1986); doi: 10.1117/12.952335
Show Author Affiliations
R. Wattenbach, Max-Planck-Institut fur Radioastronomie (West-Germany)
R. Nowak, Max-Planck-Institut fur Radioastronomie (West-Germany)
R. Densing, Max-Planck-Institut fur Radioastronomie (West-Germany)
H.-P. Roser, Max-Planck-Institut fur Radioastronomie (West-Germany)
S. A. Salito, Centre de Recherches en Physique des Plasmas (Switzerland)
R. Behn, Max-Planck-Institut fur Radioastronomie (West-Germany)

Published in SPIE Proceedings Vol. 0598:
Instrumentation for Submillimeter Spectroscopy
Erik L. Kollberg, Editor(s)

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