The detection efficiency study of NaI(Tl) scintillation detector with the different numbers of SiPMs

Wang Bao; Zhang Xiongjie; Wang Qingshan; Wang Dongyang; Li Dong; Xiahou Mingdong; Zhou Pengfei; Ye Hao; Hu Bin; Zhang Lijiao

doi:10.1016/j.net.2022.01.010

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자료유형: 학술저널

저자정보: Wang Bao (Engineering Research Center of Nuclear Technology Application (East China University of Technology)) Zhang Xiongjie (Engineering Research Center of Nuclear Technology Application (East China University of Technology)) Wang Qingshan (Engineering Research Center of Nuclear Technology Application (East China University of Technology)) Wang Dongyang (Engineering Research Center of Nuclear Technology Application (East China University of Technology)) Li Dong (Engineering Research Center of Nuclear Technology Application (East China University of Technology)) Xiahou Mingdong (Engineering Research Center of Nuclear Technology Application (East China University of Technology)) Zhou Pengfei (Engineering Research Center of Nuclear Technology Application (East China University of Technology)) Ye Hao (Engineering Research Center of Nuclear Technology Application (East China University of Technology)) Hu Bin (Engineering Research Center of Nuclear Technology Application (East China University of Technology)) Zhang Lijiao (Engineering Research Center of Nuclear Technology Application (East China University of Technology))

저널정보: 한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제54권 제7호

발행연도: 2022.7

수록면: 2,564 - 2,571 (8page)

DOI: 10.1016/j.net.2022.01.010

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SiPMs are generally coupled into whole columns in gamma energy spectrum measurement, but the relationship between the distribution of whole SiPM columns and the energy resolution of the measured energy spectra is rarely reported. In this work, ? 3 3 inch NaI scintillator is placed on an 8 8 SiPM array, and the energy resolution of the 137Cs peak at 662 keV corresponding to the g-ray is selected as a reference. Each SiPM is switched to explore the influence of the number of SiPM arrays, distribution position, and reflective layer on the energy resolution of SiPMs. Results show that without coupling, the energy resolution is greatly improved when the number of SiPMs ranges from 4 to 32. However, after 32 slices (the area covered by SiPMs relative to the scintillator reaches 25.9%), the improvement in energy resolution and total pulse count is not obvious. In addition, the position of SiPMs relative to the scintillator does not exert much impact on the energy resolution. Results also indicate that by adding a reflective film (ESR), the energy resolution of the tested group increases by 10.38% on average. This work can provide a reference for the design and application of miniaturized SiPM gamma spectrometers

#Gamma spectrometer #NaI(Tl) #SiPM #Energy resolution

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