Absolute Intensities of X-Rays Anomalously Diffracted through Nearly Perfect Copper Crystals

Abstract

Absolute integrated intensities of the x-ray beams anomalously transmitted through nearly perfect copper crystals have been measured for the (111) planes for values of $\ensuremath{\mu}t$ ranging from 10 to 90. Results obtained for both the symmetric and asymmetric Laue geometries are compared with theory. These comparisons yield a value of 0.965\ifmmode\pm\else\textpm\fi{}0.003 for the ratio f\ensuremath{''}(111)/f\ensuremath{''}(000) and indicate that the crystals investigated have a high degree of perfection. The measurements were made with Mo $K\ensuremath{\alpha}$ radiation using a double-crystal spectrometer arranged in the parallel condition and with the first crystal diffracting in the Bragg geometry. Measured profiles of the Bragg-Laue double-crystal rocking curves for $\ensuremath{\mu}t=10 \mathrm{and} 90$ are in semiquantitative agreement with the theory.