PbWO4 and BaF2:PbWO4 were grown by multi-crucible temperature gradient system.The transmittance spectra and x-ray excited luminescence spectra of as-grown PbWO4,annealed PbWO4 and annealed BaF2:PbWO4 were studied.The results reveal that these properties are related to the composition and growth arts of the crystals.The facts are complicated for the crystals annealing.In the wavelength range above 360nm,the transmittance for the annealed crystal is better than that of the as-grown crystal,while it is a littl...