Influence of Y doping on the scintillation properties of PbWO4 single crystals

摘要

Undoped and series of Y3+ doped PbWO4 crystals were grown by the Czochralski method. The transmittance at 420 nm wavelength of PbWO4 crystal was decreased when it was annealed in an oxygen-rich environment; whereas it was increased when the crystal was annealed in vacuum. A mechanism on the transmittance change was proposed. Compared with undoped crystals, the transmittance and the ratio of the blue emission to green emission for Y:PbWO4 were improved. It implied that Y doping prevented the creation of Pb3+ in the crystal. Correspondingly, the light yield of PbWO4 by doping Y was increased. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 17]