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arXiv 1703.07214physics.ins-dethep-exnucl-ex
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含硼有机液体Scintillator的淬火测量与模型化

Quenching Measurements and Modeling of a Boron-Loaded Organic Liquid Scintillator

Shawn Westerdale, Jingke Xu, Emily Shields, Francis Froborg, Frank Calaprice, Thomas Alexander, Ani Aprahamian, Henning O. Back, Clark Casarella, Xiao Fang, Yog… 展开作者

Shawn Westerdale, Jingke Xu, Emily Shields, Francis Froborg, Frank Calaprice, Thomas Alexander, Ani Aprahamian, Henning O. Back, Clark Casarella, Xiao Fang, Yogesh K. Gupta, Edward Lamere, Qian Liu, Stephanie Lyons, Mallory Smith, Wanpeng Tan

摘要:

有机液体稀释剂在实验核物理和粒子物理中有广泛的应用。由于$^{10}$ B的高热中子俘获截面,硼负载的中子吸收器对于检测中子俘获特别有用。这些闪烁器通常用于中子探测器,包括DarkSide-50中子否决器,其中中子在闪烁器中散射质子或在$^{10}$ B上捕获时可能产生信号。重建这些反冲的能量由于闪烁猝灭而变得复杂。了解这些闪烁体中的核反冲如何被抑制是一个重要而困难的问题。在这篇文章中,我们提出了一套测量的中子引起的质子反冲在硼负载的有机液体闪烁体在反冲能量范围从57- 467 keV,我们比较这些测量预测从不同的淬火模型。我们发现,修改后的Birks的模型,其分母是二次的$dE/dx$最好的描述测量,与$χ^2$ /NDF $=1.6$。这一结果将有助于模拟类似探测器中的核反冲闪烁,并可用于提高其中子标记效率。

英文摘要:

Organic liquid scintillators are used in a wide variety of applications in experimental nuclear and particle physics. Boron-loaded scintillators are particularly useful for detecting neutron captures, due to the high thermal neutron capture cross section of $^{10}$B. These scintillators are commonly used in neutron detectors, including the DarkSide-50 neutron veto, where the neutron may produce a signal when it scatters off protons in the scintillator or when it captures on $^{10}$B. Reconstructing the energy of these recoils is complicated by scintillation quenching. Understanding how nuclear recoils are quenched in these scintillators is an important and difficult problem. In this article, we present a set of measurements of neutron-induced proton recoils in a boron-loaded organic liquid scintillator at recoil energies ranging from 57--467 keV, and we compare these measurements to predictions from different quenching models. We find that a modified Birks' model whose denominator is quadratic in $dE/dx$ best describes the measurements, with $χ^2$/NDF$=1.6$. This result will help model nuclear recoil scintillation in similar detectors and can be used to improve their neutron tagging efficiency.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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