Monte Carlo method for gamma spectrometry based on GEANT4 toolkit: Efficiency calibration of BE6530 detector
Monte Carlo method for gamma spectrometry based on GEANT4 toolkit: Efficiency calibration of BE6530 detector
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DOI：
10.1016/j.jenvrad.2018.03.015
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发表时间：
2018-09-01
影响因子：
2.3
通讯作者：
David, Strivay
中科院分区：
文献类型：
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作者：
Joel, Guembou Shouop Cebastien;Maurice, Ndontchueng Moyo;David, Strivay
结合γ能谱法、蒙特卡罗方法的发展和GEANT 4（GEometry ANd Tracking）工具包，开发了γ能谱模拟软件。主要目的是验证我们实验室建立的宽能锗（BEGe）探测器几何形状的模拟模型（BE6530模型）。利用GEANT4工具包对BE6530探测器的几何结构进行了蒙特卡罗模拟。利用MC模拟的效率曲线与实验结果进行了比较。评估了效率的模拟和实验估计的测量不确定性，以确定实际测量的结果是否在适当的截止点内。通过实验估计参考样品中的活性浓度进行了模拟的验证，并且比较显示实验与模拟之间具有良好的相关性。因此，从本研究的结果可以得出结论，蒙特-卡罗模拟是一个有用的，合理的选择，另外，提供了更突出的适应性，更大的灵活性，精度和准确性，并赢得了时间，确定探测器的响应和效率在日常的环境放射性监测。
The combination of gamma-ray spectrometry, the development of related Monte Carlo method and the GEANT4 (GEometry ANd Tracking) toolkit have been developed for gamma spectrometry simulation. The main objective was to validate simulation models of broad energy germanium (BEGe) detector geometry built in our laboratory (BE6530 model). Monte Carlo simulation of the geometry of BE6530 detector for efficiency calibration was carried out with GEANT4 toolkit. The simulated efficiencies curves using MC were compared with experimental results. Measurement uncertainties for both simulation and experimental estimations of the efficiency were assessed in order to see whether the consequences of the realistic measurement fall inside adequate cut-off points. The validation of the simulation was carried out by experimentally estimating the activity concentration in a reference sample and the comparison showed good correlation between experimental and simulation. Therefore, from the outcomes of this study, it can be concluded that Monte-Carlo simulation is a helpful, reasonable option that additionally gives more prominent adaptability, greater flexibility, precision and accuracy, and gained time when determining the detector response and efficiency in routine of environmental radioactivity monitoring.