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引用次数: 1
摘要
文摘：在校准的NaI（Tl）3“×3”γ能谱仪的γ能谱领域，讨论了对原始光谱光峰区的校正。本文使用基于贝叶斯定理的GRAVEL算法来测试低能量区间的展开过程，其中康普顿连续群和背景贡献占主导地位。利用经验证的Geant4程序，由单能γ射线构建了模拟响应矩阵。将计算的光谱与实验的133Ba伽玛光谱进行了比较。比较的活性在4.10%的顺序中被发现是良好一致的。关键词：光谱展开，伽马射线光谱，Geant4模拟，NaI（Tl）探测器。PACS:NaI（Tl）：由铊（T1）激活的碘化钠（NaI）检测器，Geant4:GEometry ANd Traking，FWHM：半最大全宽。
Low-energy Gamma Unfolding Using NaI(Tl) Geant4 Detector Model and GRAVEL Code
Abstract: In the field of gamma spectrometry with calibrated NaI(Tl) 3” × 3” γ-ray spectrometer, the correction of the photo-peak region of the original spectrum was discussed. In the present paper, GRAVEL algorithm based on Bayes theorem was used to test the unfolding process at low energetic interval, where Compton continium and background contributions are dominant. The simulated response matrix was constructed from mono-energetic γ-ray using validated Geant4 code. The calculated spectrum was compared with experimental 133Ba gamma spectrum. The compared activities were found in good agreement in 4.10 % order.
Keywords: Spectrum unfolding, Gamma-ray spectra, Geant4 simulation, NaI(Tl) detector.
PACS: NaI(Tl): Sodium iodide (NaI) detector activated by thallium (Tl), Geant4: GEometry ANd Traking, FWHM: Full Width at Half Maximum.
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