Fine Structures of the X-ray Absorption by the Single Crystal of Germanium

Abstract

The fine structures of X-ray absorption by single crystals of germanium were investigated. These crystals were used as an analysing crystal of a spectrometer and at the same time as an absorber. The intensities of general radiation reflected from (1 0 0), (1 1 0) and (1 1 1) planes were investigated. The fine structures of intensities reflected from these planes were in agreement with those of absorption spectrum reported by Doran and Stephenson obtained by the transmission method using a single crystal as an absorber. However, they reported that they observed a weak fine structure near the absorption edge which was not observed by us. The observed fine structure of the absorption can be interpreted in terms of Kronig's theory, while the absence of the fine structure near the absorption edge is due to the anomalous scattering of germaninum on the one hand and to the thickness effect reported by Parratt, Hempstead and Jossem on the other.