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arXiv 1701.04514astro-ph.IMphysics.ins-det
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用于暗物质搜索实验的使用液体闪烁体的原型主动否决系统的性能

Performance of a prototype active veto system using liquid scintillator for a dark matter search experiment

J. S. Park, P. Adhikari, G. Adhikari, S. Y. Oh, N. Y. Kim, Y. D. Kim, C. Ha, K. S. Park, H. S. Lee, E. J. Jeon

摘要:

我们报告的性能,主动否决系统使用液体闪烁体与碘化钠(铊)晶体用于暗物质搜索实验。当NaI(Tl)晶体浸入原型探测器中时,探测器在0-10 keV能量区域标记48%的内部K-40背景。我们还确定了6-20 keV事件的标记效率为总事件的26.5 +/-1.7%,相当于0.76 +/-0.04事件/keV/kg/天。根据模拟,来自光电倍增管中的U、Th和K放射性同位素的大约60%的背景事件在0-10 keV的能量下被标记。用40厘米厚的液体闪烁体进行全屏蔽可以将内部K-40和外部背景的标记效率提高到大约80%。

英文摘要:

We report the performance of an active veto system using a liquid scintillator with NaI(Tl) crystals for use in a dark matter search experiment. When a NaI(Tl) crystal is immersed in the prototype detector, the detector tags 48% of the internal K-40 background in the 0-10 keV energy region. We also determined the tagging efficiency for events at 6-20 keV as 26.5 +/- 1.7% of the total events, which corresponds to 0.76 +/- 0.04 events/keV/kg/day. According to a simulation, approximately 60% of the background events from U, Th, and K radioisotopes in photomultiplier tubes are tagged at energies of 0-10 keV. Full shielding with a 40-cm-thick liquid scintillator can increase the tagging efficiency for both the internal K-40 and external background to approximately 80%.

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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