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21 April 1986 High Resolution Molecular Spectroscopy In The Wavelength Region From 1 mm to 0.1 mm
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Proceedings Volume 0598, Instrumentation for Submillimeter Spectroscopy; (1986)
Event: 1985 International Technical Symposium/Europe, 1985, Cannes, France
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.
© (1986) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
R. Wattenbach, R. Nowak, R. Densing, H.-P. Roser, S. A. Salito, and R. Behn "High Resolution Molecular Spectroscopy In The Wavelength Region From 1 mm to 0.1 mm", Proc. SPIE 0598, Instrumentation for Submillimeter Spectroscopy, (21 April 1986);

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