Optical transmission radiation damage and recovery stimulation of DSB: Ce3+ inorganic scintillation material. (13th February 2015)

• Record Type: Journal Article
• Authors: Borisevich, A; Dormenev, V; Korjik, M; Kozlov, D; Mechinsky, V; Novotny, R W
• Is Part Of: Journal of physics. Number 587(2015)
• Page Start: 012063
• Publication Date: 2015-02-13
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/587/1/012063
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: Recently, a new scintillation material DSB: Ce 3+ 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 Ce 3+, 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 mm 3 have 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.