Messungen der anomalen Durchlässigkeit und der Reflexion von Röntgenstrahlung an guten Germanium-Einkristallen im Bragg-Fall der Interferenz Vergleich mit der dynamischen Theorie der Röntgeninterferenzen

Abstract

Curves of anomalous transmission, rocking curves, and integral reflection of very good germanium crystals (some of them were free from dislocations) were measured in the Bragg-case of x-ray diffraction and compared with curves resp. values calculated from dynamical theory. CuK _α radiation was used.

According to the measurements the quotient ¦χ_ih¦/¦χ_io¦ of imaginary parts of the fourier coefficients of electron density function is found to be 0.61 for (333)- and 0.73 for (444)-reflection.

Though qualitative conformity of measurement with theory is very good there exists systematic differences especially with (444)-reflection: the measured maximum of rocking curves comes out about 11% too low, the measured minimum of transmission curves about 20% too high. At the same time integral reflection is too small. It is discussed whether the discrepancy may be caused by lattice defects.