Microwave Spectrometer

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Microwave Spectrometer The radiation from the source passes through a gaseous sample and is detected by a crystal diode detector that is followed by an amplifier and display system (chart recorder). http://www.britannica.com/nobelprize/article-80625

Varian’s First Klystron

Fourier Transform Microwave Spectrometer … the radiation is confined in an evacuated cavity between a pair of spherical mirrors and the sample is introduced by a pulsed nozzle that lowers the temperature of the sample to less than 10 K. The sample is subjected to rotational energy excitation by application of a pulsed microwave signal, and the resulting emission signal is detected and Fourier-transformed to an absorption versus frequency spectrum. http://www.britannica.com/nobelprize/article-80625

Spectrum for HCl - Far IR

Fundamental Line for HCl

Vibration-Rotation Spectrum for Diatomic Mols.

Vibration – Rotation Spectrum of HCl in the Near IR

Types of Tops

Prolate vs. Oblate Tops

Emission Microwave Spectrum in Orion A

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