Positron annihilation study of PbWO4 crystal doped with Y2O3 at different concentration
作者： Jianjun Xie , Zhengsong Geng , Hui Yuan , Wei Xiong , Liang Chen
关键词: Positron 、 Analytical chemistry 、 Chemistry 、 Valence (chemistry) 、 Diffraction 、 Trapping 、 Oxygen ions 、 Positron annihilation 、 Condensed matter physics 、 Spectroscopy 、 Doping
摘要: A study of vacancy-related defects in yttrium-doped PbWO4 with doping concentration 0-1 mol% has been performed using X-ray diffraction and positron annihilation lifetime spectroscopy. It was found that the samples have vacancy-like act as traps. Two main defect life-time components were all samples, one at about 0.195 ns to 0.208 other 0.408 0.735 ns. These trapping sites can be attributed single Pb-site vacancies interstitial oxygen ions, respectively.
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