Reflection Method for Obtaining the Infrared Spectrum of a Thin Layer on a Metal Surface
- 1 March 1969
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 50 (5) , 1963-1968
- https://doi.org/10.1063/1.1671315
Abstract
Previous calculations have shown that a thin, moderately absorbing layer on a metal surface has an absorption factor in the infrared which varies greatly with the angle of incidence and the state of polarization of the incident radiation. The requirements on a spectroscopic system, which uses the insights of these calculations, are discussed under the realistic conditions of multiple reflections with a low f/number beam. A method is described for obtaining many reflections between closely spaced mirrors.Radiation emerges from a narrow aperture between the mirrors, the aperture serving as an effective source for the infrared monochromator. A system has been constructed and its use is illustrated by the spectrum of a cellulose acetate layer on a silvermirror.Keywords
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