Fine Structures of X-ray Absorption Spectra of Crystalline and Amorphous Germanium

The X-ray absorption spectra of crystalline and amorphous germanium were photographed and fine structures at the K absorption edges were observed to 500 ev. in the crystalline and to 350 ev. in the amorphous state. The shape of the fine structure of amorphous germanium is like that of crystalline germanium though the small fluctuations disappear and the energy values measured from the main edge are smaller than the values of corresponding absorption maxima and minima of the crystalline germanium. From the comparison of the fine structures of both states we suggest that a structure which is like the diamond lattice of crystalline Ge with the smaller spacing exists in the amorphous Ge and this result coincides with the result of analysis of the X-ray diffraction pattern by Richter.