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  • Optical transmission radiat...
    Borisevich, A; Dormenev, V; Korjik, M; Kozlov, D; Mechinsky, V; Novotny, R W

    Journal of physics. Conference series, 01/2015, Letnik: 587
    Journal Article

    Recently, a new scintillation material DSB: Ce super(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 super(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 -20degrees to +20degreesC. Several samples with dimensions of 15x15x7 mm super(3) have been tested for damage effects on the optical transmission under irradiation with gamma -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 super(-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 50degreesC and completely removed in a short time when annealing at 100degreesC. 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.