Coherent Bremsstrahlung in Imperfect Periodic Atomic Structures
  Coherent bremsstrahlung of high energy electrons moving in a three-dimensional imperfect periodic lattice consisting of a complicated system of atoms is considered. On the basis of the normalized probability density function of the distribution of atomic centers in the fundamental cell the relations describing coherent and incoherent contributions into cross sections are obtained. In particular, the cross section of coherent bremsstrahlung in complex polyatomic single crystals is found.   The peculiarities of formation and possibilities of utilization of coherent processes are discussed. 
S. Bellucci, V.A. Maisheev