A Cavity Search Spectrometer for Free Radical Microwave Rotational Absorption Studies

A Zeeman modulated microwave spectrometer, specifically designed for K band rotational studies of gaseous free radicals and transient molecular species and using a Fabry‐Perot type resonator as the absorption cell, is described. The theoretical sensitivity of the system is shown to be comparable to...

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Bibliographic Details
Published in:Review of scientific instruments 1971-06, Vol.42 (6), p.789-796
Main Authors: Hrubesh, Lawrence W., Anderson, Roger E., Rinehart, Edgar A.
Format: Article
Language:English
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Summary:A Zeeman modulated microwave spectrometer, specifically designed for K band rotational studies of gaseous free radicals and transient molecular species and using a Fabry‐Perot type resonator as the absorption cell, is described. The theoretical sensitivity of the system is shown to be comparable to that of the most sensitive waveguide cell spectrometers. The previously assigned spectra of OH and NO2 radicals have been successfully located with the system. The utility of the system as a search spectrometer for free radicals has been substantiated by locating previously unreported spectra for the NO2 molecule and NF2 (difluoroamino) free radical.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.1685232