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 / 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：

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

页码：380 / 383

页数：4

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