Using a LaBr3:Ce scintillator for positron annihilation lifetime spectroscopy

被引：0
|
作者：
刘军辉 [1 ,2 ,3 ]
李道武 [1 ,2 ]
章志明 [1 ,2 ]
王宝义 [1 ,2 ]
张天保 [1 ,2 ]
郝佳 [4 ]
魏龙 [1 ,2 ]
机构：
[1] Key Laboratory of Nuclear Analysis Techniques, Institute of High Energy Physics, Chinese Academy of Sciences
[2] Beijing Engineering Research Center of Radiographic Techniques and Equipment
[3] Number 8, Qinghe Building
[4] Beijing Huakailong Electronics Co.Ltd
来源：
中国物理C | 2012年 / 36卷 / 04期
基金：
中国国家自然科学基金;
关键词：
PALS; LaBr3:Ce;
D O I：
暂无
中图分类号：
TL812 [闪烁探测技术和仪器];
学科分类号：
082704 ;
摘要：
A LaBr3:Ce scintillator has a high light output (～60000 p.e/MeV) and a short decay constant (<25 ns), which makes it good for time spectrometry. Compared with a BaF2 scintillator, it can bear a much higher count rate, and can be coupled to photomultipliers without using a quartz window. In this work, a positron annihilation lifetime spectrometer (PALS) consisting of two bulks of φ25 mm×25 mm LaBr3:Ce scin- tillator coupled to two XP20D0 photomultipliers, respectively, was built. A time resolution of FWHM=206 ps was measured for the PALS with a 60Co source at the energy window for 22Na. With this spectrometer, a reasonable lifetime value τ =221±4 ps in a pure Si sample is obtained, which means that the utilization of LaBr3:Ce as the detector for a PALS is feasible.
引用
收藏
页码：380 / 383
页数：4
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