Measurements of anomalous elastic scattering of 59.54-keV photons

Coherent scattering cross sections of 59.54-keV photons on target foils of Gd-64, Dy-66, Er-68, Yb-70, Hf-72, and Ta-73 at 60 degrees, 90 degrees, and 120 degrees have been measured to provide information on the region of K anomalous elastic scattering. The results are compared with the values calculated by the second perturbative order S matrix and by two procedures based on the form-factor approximation corrected by the anomalous scattering factors. Agreement of the S matrix values is very satisfactory, on the whole, and that of the values given by the form-factor approximations is fairly good.