New heavy scintillators for heterogeneous electromagnetic calorimeters

Results of studies of optical and scintillation properties of new heavy sci ntillating composite materials and a CsI:Br inorganic scintillator are pres ented. These scintillators are intended to be used for the creation of hete rogeneous electromagnetic calorimeters with an energy resolution as high as sigma/E congruent to (4 - 5%)/root E. The possibilities of using low-cost optical ceramics as active media in heterogeneous electromagnetic calorimet ers are considered.