Radiation hardness of mass produced PWO crystals

The studies of the distribution of the induced absorption in the spectral region of scintillations for mass produced PWO crystals and kinetics recovery have been made at the Bogoroditsk Techno-Chemical Plant (BTCP) using a specially developed rapid analysis method and at CERN by tests at various facilities easy to compare with electrons beam damages easy to access in a close vicinity. A probability for crystals with poor radiation hardness to be installed into calorimeter and a probability for crystals with good radiation hardness to be rejected during certification are estimated. It is shown that instead of measurements of the loss of light yield transmitted through PWO crystals under the electron beam irradiation, it is possible to use a sampling based measurements method of radiation induced absorption of crystals, i.e. to control the PWO crystals distribution by their radiation hardness. 8 Refs.