PbO compensation in the growth of PbWO_4: Y~(3+) crystals

摘要

The light yield of Y~(3+)-doped PbWO_4 crystals increases after low-dose-rate irradiation with y rays, and the radiation hardness is sensitive to annealing temperature. In the PWO growth procedure, an excess of PbO in the starting materials is a convenient method of compensating for PbO volatility. The relationship between the excess of PbO and the abnormal radiation behaviour has been investigated. The mechanism of the normal excess of PbO in the growth of PWO: Y~(3+) is discussed.