Radiation damage effects in Y2_2SiO5_5:Ce scintillation crystals under γ\gamma-quanta and 24 GeV protons

This work focuses on the study of changes in the optical transmission of Y 2 SiO 5 :Ce crystals caused by ionizing radiation from γ-quanta and high energy protons. Radioisotope content of proton-irradiated crystals, transmission and induced absorption spectra, and scintillation characteristics are measured after irradiation with protons. In contrast to crystals of heavy complex oxides, Y 2 SiO 5 :Ce crystals do not demonstrate significant deterioration of transmission in the luminescence range (400–600 nm) under irradiation. Such crystals can be considered as a material for construction of detecting cells of the calorimetric detectors at LHC with high luminosity. The feasibility of growing large crackless Y 2 SiO 5 :Ce crystals with a diameter up to 50 mm and length up to 250mm is demonstrated

Engineering of bulk and fiber-shaped YAGG:Ce scintillator crystals

Composition-property correlations have been systematically studied in the full concentration range of Y$_{3}$Al$_{5−x}$Ga$_{x}$O$_{12}$:Ce (YAGG:Ce) scintillator crystals. The most promising compositions for new high energy physics experiments at colliders have been determined with the light output >200% relative to BGO and fast luminescence decay. Codoping with Ca$^{2+}$ provides the decrease of phosphorescence intensity to 0.2% after 0.6 $\mu$s and shortening of the luminescence decay constant to 21 ns. Factors affecting the scintillation decay time in YAGG:Ce have been discussed. The crystals show weak transmission loss under $\gamma$-irradiation. The feasibility to produce YAGG:Ce fibers using the $\mu$-PD method has been shown