TOWARDS A RIGOROUS TREATMENT OF THE WAVE-FIELD PROPAGATION ACCORDING TO THE STATISTICAL-THEORY OF DYNAMIC DIFFRACTION

Boundary conditions in the statistical theory of dynamical diffraction are shown to be closely related to the interference effect between th e incident wave and the forward-diffracted wave. The propagation of th e incoherent diffracted beams is analysed in the case of Laue geometry . For E = 0 (E, static Debye-Waller factor), we then obtain generalize d energy transfer equations which are valid in the whole influence reg ion of a point radiation source. The most significant physical differe nce from previous formulations concerns the behaviour of integraded in tensities for crystals such that chi2tauT much greater than 1 (chi is the reciprocal of extinction distance, tau the correlation length of t he lattice distortion and T the crystal thickness along the incident d irection).