The green emission and local structure of the scintillator PbWO4

被引：45
|
作者：
Qi, ZM [1 ]
Shi, CS
Zhou, DF
Tang, HG
Liu, T
Hu, TD
机构：
[1] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230039, Anhui, Peoples R China
[2] Inst High Energy Phys, Beijing 100039, Peoples R China
来源：
PHYSICA B-CONDENSED MATTER | 2001年 / 307卷 / 1-4期
基金：
中国国家自然科学基金;
关键词：
PbWO4; EXAFS; defects; emission;
D O I：
10.1016/S0921-4526(01)00973-5
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The green emission of lead tungstate (PbWO4) is closely related to structure defects. For studying the mechanism of the green emission, the local structure of PbWO4 has been first investigated by extended X-ray absorption fine structure using synchrotron radiation. The results indicate that the excess oxygen in air-annealed PbWO4 exists and forms "WO4 + O-i" centers. The green emission of PbWO4 is not caused by (WO3 + F) centers, but probably originates from the centers Of "WO4 + O-i". (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：45 / 50
页数：6
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