High-resolution positron lifetime spectrometer with BaF2 scintillators
High-resolution positron lifetime spectrometer with BaF2 scintillators
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DOI：
10.1007/bf00620601
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发表时间：
1987-03
期刊：
影响因子：
--
通讯作者：
H. Rajainmäki
中科院分区：
文献类型：
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作者：
H. Rajainmäki
在本次通讯中，我们报告了一种基于单晶氟化钡 (BaF2) 闪烁体的快速符合正电子寿命谱仪的设计。在正常的实验装置（光电倍增管中的阴极接地）中获得了良好的时间分辨率（190ps，FWHM）和高效率。由于 BaF2 闪烁体的高检测效率，观察到堆积效应会干扰 180 度几何形状中测量的寿命。
In this communication we report on a design of a fast coincidence positron lifetime spectrometer, which is based on single crystal barium fluoride (BaF2) scintillators. A good time resolution (190ps, FWHM), combined with a high efficiency, has been obtained in the normal experimental set-up (with cathode earthed in the photo multipliers). The pile-up effect is observed to disturbe the measured lifetimes in the 180 degree geometry due to the high detection efficiency of the BaF2scintillator.