A compact positron annihilation lifetime spectrometer
A compact positron annihilation lifetime spectrometer
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DOI：
10.1088/1674-1137/35/1/021
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发表时间：
2011
影响因子：
3.6
通讯作者：
李道武;刘军辉;章志明;王宝义;张天保;魏龙;Dw Li;JH Liu;ZM Zhang;Baoyi Wang;Tb Zhang;L. Wei
中科院分区：
文献类型：
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作者：
李道武;刘军辉;章志明;王宝义;张天保;魏龙;Dw Li;JH Liu;ZM Zhang;Baoyi Wang;Tb Zhang;L. Wei
利用LYSO闪烁体与哈马松R9800（一种快速光电倍增管）耦合构成小尺寸γ射线探测器，建立了一个用于正电子湮没实验的小型寿命谱仪。系统时间分辨FWHM=193 ps，符合计数率接近8 cps/mu Ci。测试了退火好的Si中正电子湮没的寿命值为219 +/- 1 ps，这与以前讲座中发表的典型值一致。
Using LYSO scintillator coupled on HAMAMATSU R9800 (a fast photomultiplier) to form the small size gamma-ray detectors, a compact lifetime spectrometer has been built for the positron annihilation experiments. The system time resolution FWHM=193 ps and the coincidence counting rate similar to 8 cps/mu Ci were achieved. A lifetime value of 219 +/- 1 ps of positron annihilation in well annealed Si was tested, which is in agreement with the typical values published in the previous lectures.