Modification of PbWO4 scintillator characteristics by doping

The influence of different doping ions on the emission and scintillation ch aracteristics of PbWO4 scintillator was studied. In the case of Ce doping, efficient non-radiative recombination at Ce sites takes place, resulting in lower light yield and faster luminescence and scintillation response. Low temperature thermoluminescence characteristics resemble those obtained earl ier for La3+ (Y3+,Lu3+,Gd3+) doping ions. Tb3+, Sm3+ and Pr3+ doping result s in an additional emission-the leading emission lines are obtained at 543, 641 and 602 nm, respectively. Corresponding decay times were measured to b e 650, 848 and 61 mus at 295 K, respectively. (C) 2001 Elsevier Science B.V . All rights reserved.