Polarization bremsstrahlung from relativistic electrons moving in a small-grained medium

Polarization bremsstrahlung from relativistic electrons moving in a medium consisting of very small crystals oriented at random is studied theoretical ly. The results of this analysis predict a sharp dependence of the spectral and angular features of the radiation on the crystal dimensions arid ori t he angle of observation. The possibility of developing, on the basis of the phenomena considered in the present study, a new method for studying lowly ordered media is highlighted. (C) 2001 MAIK "Naika/Interperiodica".