A study on the radiation hardness of lead tungstate crystals
A study on the radiation hardness of lead tungstate crystals
复制标题
钨酸铅晶体辐射硬度的研究
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
S. Stoll
中科院分区：
文献类型：
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作者：
R. Zhu;Q. Deng;H. Newman;C. Woody;J. Kierstead;S. Stoll
This report presents recent progress of a study on the radiation damage in lead tungstate (PbWO/sub 4/) crystals. The dose rate dependence of radiation damage in PbWO/sub 4/ has been observed, confirming our early prediction based upon a kinetic model of color centers. An optimization of the oxygen compensation through post-growth thermal annealing, carried out in Shanghai Institute of Ceramics, has led to PbWO/sub 4/ crystals with significantly improved radiation hardness. A comparison between front versus uniform irradiations revealed that the later caused a factor of 2 to 6 times more severe damage. A measurement of a preliminary batch of lanthanum doped PbWO/sub 4/ crystals indicates that the La doping seems not a determine factor for PbWO/sub 4/ radiation hardness improvement. Finally, a TEM/EDS analysis confirmed our previous conjecture that the radiation damage in PbWO/sub 4/ crystals is caused by oxygen vacancies.
