Optical transmission radiation damage and recovery stimulation of DSB: Ce3+ inorganic scintillation material

16th International Conference on Calorimetry in High Energy Physics

Borisevich, A.^1 ; Dormenev, V.^2 ; Korjik, M.^1 ; Kozlov, D.^1 ; Mechinsky, V.^1 ; Novotny, R.W.^2

Institute for Nuclear Problems, Minsk, Belarus^1

2nd Physics Institute, Justus-Liebig-University, Giessen, Germany^2

关键词: Application of standards;    Doping concentration;    Induced absorption;    Radiation-induced absorption;    Scintillation materials;    Temperature dependence;    Temperature variation;    Thermal-annealing;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/587/1/012063/pdf
DOI  :  10.1088/1742-6596/587/1/012063

来源: IOP

【 摘 要 】

Recently, a new scintillation material DSB: Ce3+was announced. It can be produced in a form of glass or nano-structured glass ceramics with application of standard glass production technology with successive thermal annealing. When doped with Ce3+, material can be applied as scintillator. Light yield of scintillation is near 100 phe/MeV. Un-doped material has a wide optical window from 4.5eV and can be applied to detect Cherenkov light. Temperature dependence of the light yield LY(T) is 0.05% which is 40 times less than in case of PWO. It can be used for detectors tolerant to a temperature variation between -20° to +20°C. Several samples with dimensions of 15x15x7 mm3have been tested for damage effects on the optical transmission under irradiation with γ-quanta. It was found that the induced absorption in the scintillation range depends on the doping concentration and varies in range of 0.5-7 m-1. Spontaneous recovery of induced absorption has fast initial component. Up to 25% of the damaged transmission is recuperated in 6 hours. Afterwards it remains practically constant if the samples are kept in the dark. However, induced absorption is reduced by a factor of 2 by annealing at 50°C and completely removed in a short time when annealing at 100°C. A significant acceleration of the induced absorption recovery is observed by illumination with visible and IR light. This effect is observed for the first time in a Ce-doped scintillation material. It indicates, that radiation induced absorption in DSB: Ce scintillation material can be retained at the acceptable level by stimulation with light in a strong irradiation environment of collider experiments.