| BC537探测器中γ射线的响应函数测量与蒙特卡罗模拟 |
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| 引用本文： | 冯松,陈小辉,刘荣,羊奕伟,鹿心鑫,朱通华.BC537探测器中γ射线的响应函数测量与蒙特卡罗模拟[J].强激光与粒子束,2014,26(5):054001-233. |
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| 作者姓名： | 冯松 陈小辉 刘荣 羊奕伟 鹿心鑫 朱通华 |
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| 作者单位： | 1.中国工程物理研究院 核物理与化学研究所, 四川 绵阳 621 900; |
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| 基金项目： | 国家自然科学基金项目(91226104) |
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| 摘 要： | 为了将氘化液闪探测器(BC537)测量的反冲电子谱转换为γ射线能谱,利用标准γ点源对BC537探测器的响应进行了测量并运用基于蒙特卡罗方法的Geant4程序计算了BC537探测器探测γ射线的响应函数。讨论了探测器建模中有无铝壳和入射γ射线束流半径对探测效率和响应函数的影响。对比模拟和实验测量的反冲电子谱,两者符合较好。利用模拟的响应函数和实验测量标准γ源Cs-137和Co-60以及AmBe源在BC537探测器中的反冲电子谱,经迭代法解谱得到了对应的标准γ射线能谱,验证了模拟参数的合理性以及该响应函数的实用性。
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| 关 键 词： | 响应函数 蒙特卡罗方法 氘化液闪探测器 迭代法 解谱 |
| 收稿时间： | 2013/7/24 |
γ-ray response function measurements and Monte-Carlo simulation of BC537 liquid scintillator |
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| Affiliation: | 1.Institute of Nuclear Physics and Chemistry,CAEP,Mianyang 621900,China;2.Department of Engineering Physics,Tsinghua University,Beijing 100084,China |
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| Abstract: | In order to unfold the measured recoil electron spectrum generated by gamma ray in a deuterated liquid scintillator, standard gamma sources were used to measure the -ray response of BC537 detector and the -ray response function for the BC537 detector was calculated by Geant4 codes which was based on the Monte-Carlo method. The effects of the aluminum container and the beam radius on the detection efficiency were investigated as a function of the beam energy by Geant4 simulation. The simulated response function shows a good agreement with the experimental data at different energies. With the response function and the recoil electron spectrum of three reference -ray sources, an iterative unfolding algorithm was used to unfold the -ray spectrum, and the results further verify the practicability of the simulated response function. |
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| Keywords: | response function Monte-Carlo method deuterated liquid scintillator iterative method spectrum unfolding |
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