research papers
The anomalous scattering terms f' and f'' for Gd and Sm near their L3 absorption edges, measured in diffraction experiments with synchrotron radiation more nearly monochromatic than the natural level widths, show even larger effects than earlier measurements with a larger X-ray bandwidth. A test of angular dependence shows f' for Sm to decrease in magnitude with increasing diffraction angle, while f'' is essentially constant.