A unified treatment of small‐angle X‐ray scattering, X‐ray refraction and absorption using the Rytov approximation

The Helmholtz wave equation for X-rays in a dielectric medium is solved using the Rytov approximation for the X-ray phase perturbation. It is shown that under appropriate limits the solution yields the equations for small-angle X-ray scattering, X-ray refraction and absorption. This demonstrates that the Rytov approximation provides a unified treatment of small-angle X-ray phenomena.

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