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Combined doping of PbWO4 scintillation crystals with antimony and ytterbium as well as molybdenum and ytterbium has been carried out and the influence of the doping on optical transmittance, radiation hardness, intensity and spectrum of X-ray excited luminescence has been studied. We demonstrate that simultaneous doping with Sb (100 ppm) and Mo (500 ppm) shifts the band peak of X-ray luminescence from the region 430 - 450 nm to 520 nm and increases the intensity and decay time of the luminescence. The highest luminescence intensity is observed in crystals simultaneously doped with all 3 dopants (Mo, Sb, Y). The origin of the modifications is interpreted by formation of microinclusions of tungstenite phase in doped PWO crystals. The results indicate means for further development of scintillation characteristics of PbWO4 single crystals in order to effectively utilize the crystals as scintillators in radiation detectors for application in high-energy physics experiments.
S. F. Burachas,A. L. Apanasenko,Boris V. Grinyov,Konstantin A. Katrunov,Vladimir D. Ryzhikov, andGintautas Tamulaitis
"Direct modification of optical and luminescent characteristics of PbWO4", Proc. SPIE 4415, Optical Organic and Inorganic Materials, (10 April 2001); https://doi.org/10.1117/12.425508
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S. F. Burachas, A. L. Apanasenko, Boris V. Grinyov, Konstantin A. Katrunov, Vladimir D. Ryzhikov, Gintautas Tamulaitis, "Direct modification of optical and luminescent characteristics of PbWO4," Proc. SPIE 4415, Optical Organic and Inorganic Materials, (10 April 2001); https://doi.org/10.1117/12.425508