Abstract
This work focuses on the study of changes in the optical transmission of Y2SiO5: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, Y2SiO5:Ce crystals do not demonstrate significant deterioration of transmission in the luminescence range (400–600nm) 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 Y2SiO5:Ce crystals with a diameter up to 50mm and length up to 250mm is demonstrated.
Highlights
This work focuses on the study of changes in the optical transmission of Y2SiO5:Ce crystals caused by ionizing radiation from γ-quanta and high energy protons
We discuss the mechanism of radiation damage of YSO:Ce crystals from the analysis of radioisotope content after irradiation with high-energy protons
We show a feasibility of growing a high-quality large YSO:Ce crystal by the Czochralski method
Summary
The crystals were irradiated with a γ-quanta 60Co source with the absorbed dose 2000 Gy and a high-intensity flux of 24 GeV protons at CERN PS with the integral flux of $ 3.6 Â 1013 particles/cm. The crystals demonstrated small changes in optical transmission in the luminescence band, because the majority of color centers are manifested in the spectral range near the fundamental absorption edge. We discuss the mechanism of radiation damage of YSO:Ce crystals from the analysis of radioisotope content after irradiation with high-energy protons. We show a feasibility of growing a high-quality large YSO:Ce crystal by the Czochralski method
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