A compact positron annihilation lifetime spectrometer

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LI Dao-Wu, LIU Jun-Hui, ZHANG Zhi-Ming, WANG Bao-Yi, ZHANG Tian-Bao and WEI Long. A compact positron annihilation lifetime spectrometer[J]. Chinese Physics C, 2011, 35(1): 100-103. doi: 10.1088/1674-1137/35/1/021
LI Dao-Wu, LIU Jun-Hui, ZHANG Zhi-Ming, WANG Bao-Yi, ZHANG Tian-Bao and WEI Long. A compact positron annihilation lifetime spectrometer[J]. Chinese Physics C, 2011, 35(1): 100-103.  doi: 10.1088/1674-1137/35/1/021 shu
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Received: 2010-04-01
Revised: 2010-06-01
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A compact positron annihilation lifetime spectrometer

Abstract: Using LYSO scintillator coupled on HAMAMATSU R9800 (a fast photomultiplier) to form the small size γ-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 ~8 cps/μCi 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.

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