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An electron spectrometer has been constructed, which is capable of detecting the vibrational states of gases adsorbed on solid surfaces. It has been found that the excitation of fundamental, harmonic, and combination frequencies can be detected with this instrument. The vibrational spectra due to the adsorption of H2, N2, CO, and H2O on the (100) surface of tungsten have been observed. A number of conclusions concerning the adsorbed state of these gases can be drawn from these spectra. These spectra and conclusions are presented and discussed. A brief description of the apparatus is also included.
Propst et al. (Wed,) studied this question.