This figure shows the importance of careful attenuation measurement in
differentiating between different theories.
A number of experiments, including attenuation measurements and Diffraction Anomalous Fine Structure measurements, are able to investigate interesting regions of physics and require fairly precise theoretical input for comparison. Hence they can be critical tests of theory but also can investigate new areas of physics.
Clearly, this is related to the theoretical investigations.
Theory and computation of Atomic Form Factors
(See the introduction for the xray optics home page.)