X-RAY STANDING WAVE IN COMPLEX CRYSTAL STRUCTURES
The theory of the secondary radiation yield generated by the X-ray standing wave field from layered crystals based on an analytical solution of the Takagi equations for a single layer is presented. Each layer is described by its own set of structural parameters which are constant within the layer. Both Bragg and Laue cases are discussed within the same approach. The secondary radiation is considered to originate through the photoelectron absorption with the exponential yield probability function. A computational algorithm based on recurrent equations is described.