The Ultra-Violet Absorption Spectra of GeO, GeS, GeSe and GeTe

The ultra-violet absorption spectra of GeSe and GeTe have been obtained. New band-systems of both molecules have been found, and the vibrational analysis of one of them, the E-X system of GeSe, has been completed. The corresponding system, E-X, of GeS has been considerably extended, and fairly sharp dissociation limits have been found for both GeS and GeSe. A satisfactory spectrogram of GeO in absorption has been obtained. Values of the electronic and vibrational constants for all the known states of the four molecules are derived.