探测器
谱线
反褶积
材料科学
物理
伽马射线
光学
分析化学(期刊)
分光计
闪烁
计算物理学
作者
M Sohelur Rahman,Gyuseong Cho,Bo-Sun Kang
出处
期刊:Radiation Protection Dosimetry
[Oxford University Press]
日期:2009-07-01
卷期号:135 (3): 203-210
被引量:7
摘要
Maximum-likelihood fitting by the expectation maximization deconvolution method is presented to analyse gamma-ray spectra recorded using an NaI(Tl) detector for a water monitoring system. The applicability of the method was tested by deconvolving measured spectra taken using an industry standard 3'' x 3'' cylindrical NaI(Tl) detector in a model water tank with several calibration sources. The results show significant removal of the Compton continuum counts and efficient transfer of the counts into the corresponding photo-peaks. The peak-to-total count ratio and the number of counts in the photo-peaks in the deconvolved spectra increased approximately 4.67 and 5.29 times, respectively, compared with those of measured spectra taken using an NaI(Tl) scintillation detector in the case of (137)Cs.
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