Proton-Induced Radiation Damage in Fast Crystal Scintillators

This paper reports proton-induced radiation damage in fast crystal scintillators. Large size LYSO and CeF_3 crystals of 20 and 15 cm long were irradiated by 800 MeV protons at Los Alamos up to 3.3 × 10^(14) p/cm^2 with degradation and recovery of their longitudinal transmittance measured in situ. LYSO plates of 14×14×1.5 mm^3 were irradiated by 67 MeV protons at UC Davis up to 9.5 × 10^(13) p/cm^2, and by 24 GeV protons at CERN up to 6.9 × 10^(15) p/cm^2. The results show an excellent radiation hardness of LYSO crystals against charged hadrons