ANGULAR-DISTRIBUTIONS OF RELATIVISTIC CHA RGED-PARTICLES IN ORIENTED CRYSTALS

Within the equilibrium microcanonical distribution in the phase space the angular distributions of fast charged particles passing through or iented crystals are calculated. it is shown that the distribution in t he phase space may be restored from the angular distributions with a l arge degree of accuracy. The detailed calculations are performed for u ltrarelativistic electrons. The electromagnetic radiation effect on an gular distributions is studied carefully. It is shown that the effect of radiation beam self-focusing can occur in a number of cases.