| La在La:PWO闪烁晶体中的作用机制探讨 |
| |
| 引用本文： | 张明荣,胡关钦.La在La:PWO闪烁晶体中的作用机制探讨[J].发光学报,1997,18(4):320-322. |
| |
| 作者姓名： | 张明荣 胡关钦 |
| |
| 作者单位： | 中国科学院上海硅酸盐研究所, 上海 201800 |
| |
| 摘 要： | 根据掺La的PWO晶体(LaPWO晶体)的透射光谱和发射光谱随La浓度的变化特性及其电子顺磁共振(EPR)谱,作者认为,掺La使晶体产生了新的以(LaPb)2/3(VPb)1/3WO4为主的缺陷,LaPWO晶体的透光性能的改善主要是由于Pb空位(VPb)"的增加.而发光性能的降低则主要是(LaPb)和(VPb)"的共同作用.
|
| 关 键 词： | 钨酸铅晶体 La掺杂 点缺陷 闪烁性能 |
MECHANISM OF THE EFFECT OF La DOPING ON PbWO4 SINGLE CRYSTAL |
| |
| Zhang Mingrong,Hu Guanqin,Li Peijun,Xu Li,Yin Zhiwen.MECHANISM OF THE EFFECT OF La DOPING ON PbWO4 SINGLE CRYSTAL[J].Chinese Journal of Luminescence,1997,18(4):320-322. |
| |
| Authors: | Zhang Mingrong Hu Guanqin Li Peijun Xu Li Yin Zhiwen |
| |
| Institution: | Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800 |
| |
| Abstract: | From the results of EPR measurement,i.e.no signal in PbWO4 crystals doped with Lathanum (La:PWO),a conclusion that no EPR center exists in La:PWO crystals was made.The role of La doping was thought as to increase the concentration of Pb2+ vacancy (VPb)" that could improve the optical transmittance of the crystals.And the degradation of luminescent intensities with increasing La concentration may be due to the nonradiative energy transfer of La3+ ions at Pb2+ sites and Pb2+ vacancy. |
| |
| Keywords: | PbWO4 crystal La doping point defect scintillation properties |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《发光学报》浏览原始摘要信息 |
| 点击此处可从《发光学报》下载免费的PDF全文 |
|
