Test of digital neutron-gamma discrimination with four different photomultiplier tubes for the NEutron Detector Array (NEDA)
Test of digital neutron-gamma discrimination with four different photomultiplier tubes for the NEutron Detector Array (NEDA)
复制标题
使用用于中子探测器阵列 (NEDA) 的四种不同光电倍增管进行数字中子伽马辨别测试
DOI：
10.1016/j.nima.2014.08.023
复制
发表时间：
2014-12-11
影响因子：
1.4
通讯作者：
Wadsworth, R.
中科院分区：
文献类型：
--
作者：
Luo, X. L.;Modamio, V.;Wadsworth, R.
对一个与四种不同的5英寸光电倍增管（ET9390kb、R11833 - 100、XP4512和R4144）耦合的液体闪烁探测器BC501A的中子 - 伽马甄别性能进行了比较研究。采用电荷比较法和积分上升时间法以数字方式对由Cf - 252源发射的中子和伽马射线进行甄别。在这两种方法中，通过评估在50 keVee到1000 keVee之间不同能量区域的品质因数，对四种光电倍增管的中子 - 伽马甄别能力进行了定量比较。此外，还利用飞行时间定性地进一步验证了结果，以区分伽马射线和中子。结果一致表明，光电倍增管R11833 - 100和ET9390kb在中子 - 伽马甄别方面通常表现最佳，品质因数仅有微小差异。这种优势可以通过它们相对较高的光电子产额来解释，这表明与具有较高光电子产额的光电倍增管耦合的闪烁探测器往往会产生更好的中子 - 伽马甄别性能。这项工作的结果将为未来像NEDA这样的中子探测器阵列的光电倍增管选择提供参考。（C）2014爱思唯尔公司。保留所有权利。
A comparative study of the neutron-gamma discrimination performance of a liquid scintillator detector BC501A coupled to four different 5 in photomultiplier tubes (ET9390kb, R11833-100, XP4512 and R4144) was carried out Both the Charge Comparison method and the Integrated Rise-Time method were implemented digitally to discriminate between neutrons and gamma rays emitted by a Cf-252 source. In both methods, the neutron-gamma discrimination capabilities of the four photomultiplier tubes were quantitatively compared by evaluating their figure-of-merit values at different energy regions between 50 keVee and 1000 keVee. Additionally, the results were further verified qualitatively using time-of-flight to distinguish gamma rays and neutrons. The results consistently show that photomultiplier tubes R11833-100 and ET9390kb generally perform best regarding neutron-gamma discrimination with only slight differences in figure-of-merit values. This superiority can be explained by their relatively higher photoelectron yield, which indicates that a scintillator detector coupled to a photomultiplier tube with higher photoelectron yield tends to result in better neutron-gamma discrimination performance. The results of this work will provide reference for the choice of photomultiplier tubes for future neutron detector arrays like NEDA. (C) 2014 Elsevier B.V. All rights reserved.