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Positorn annihilation study on point defects in lead tungstate

Positorn annihilation study on point defects in lead tungstate

GU Mu
TANG Xue-Feng
TONG Hong-Yong
LIANG Ling
YAO Ming-Zhen
CHEN Ling-Yan
LIAO Jing-Ying
SHEN Ding-Zhong
YIN Zhi-Wen
WANG Jing-Cheng
XU Wei-Xin
Nuclear Science and TechniquesVol.11, No.2pp.105-108Published in print 01 May 2000
17600

A study on point defects in lead tungstate (PbWO4) by using positron annihilation lifetime method is presented. The measurement was carried out for the cases of untreated, vacuum-annealed, oxygen- annealed and La-doped PbWO4 crystals. It was found that the components r2, which reflect the positron annihilation in point defects, are different from each other for each case. Some tentative models for the defects are discussed.

PbWO4 crystalPositron annihilationLead vacancyOxygen vacancy
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