Evaluation of the radon adsorption efficiency of activated carbon fiber using tetrafluoromethane
Evaluation of the radon adsorption efficiency of activated carbon fiber using tetrafluoromethane
复制标题
使用四氟甲烷评价活性炭纤维的氡吸附效率
DOI：
10.1093/ptep/ptac005
复制
发表时间：
2022
影响因子：
3.5
通讯作者：
Miuchi K
中科院分区：
文献类型：
--
作者：
Kotsar Y;Nakano Y;Takeuchi Y;Miuchi K
放射性惰性气体氡-222（222 Rn）是各种稀有事件实验中最重要的背景源之一，如直接暗物质搜索，无中微子双β衰变搜索和中微子实验。以前，建立了一种测量净化空气、氩气和氙气中浓度的方法。由于在这些实验中使用了其他检测器介质，因此可能需要扩大对其他类型气体的研究。本文测量了一个用于直接暗物质搜寻实验NEWAGE的80升四氟甲烷探测器的性能。测量了该气体探测器的校准因子，并研究了它与绝对湿度的关系。活性炭纤维对222 Rn的吸附效果优于0.10MPa。当压力低于大气压时，吸附效率随压力的降低而升高，在0.03MPa时吸附效率与压力相当。
The radioactive noble gas radon-222 (222Rn) is one of the most significant background sources in various types of rare event experiments, such as direct dark matter searches, neutrinoless double-beta decay searches, and neutrino experiments. Previously, a method to measureconcentration in purified air, argon, and xenon gases at a level ofwas established. Since other detector media are used in these experiments, there is a potential need to expand the study for other types of gases. In this paper the performance of an 80 literdetector filled with tetrafluoromethane () gas, which is used for a direct dark matter search experiment, NEWAGE, was measured. The calibration factor of the detector for thegas was measured and its dependence on the absolute humidity was investigated. We also employed activated carbon fiber to evaluate its222Rn adsorption efficiency in CF4, which was found to beat 0.10 MPa. For pressures lower than atmospheric pressure, we found that adsorption efficiency rises with lower pressure, and it is equal toat 0.03 MPa.