ABSTRACT
Some of the most widely used standard scintillators are activated ionic crystals offering high efficiency. The excitonic luminescence arises upon interaction of an electron of the conduction band with a Vk center. The intrinsic luminescence in alkali halide crystals consists of one or more bands originating from radiative annihilation of STEs. The main specific feature of crystals with the fluorite structure is the presence of voids at the centers of cubes formed by fluorine ions. The use of undoped (pure) Csl as a scintillation material has been known since the 1950s. The luminescence properties of tungstates and molybdates phosphors have been under investigation since the 1940s. Radiative CV transitions represent a new type of intrinsic luminescence which was first discovered in barium fluoride. The overlapped bands should improve the conditions of “floating up” of the holes in the upper core band.
