论文标题
用活化的碳纤维评估氙气吸附效率值
Evaluation of radon adsorption efficiency values in xenon with activated carbon fibers
论文作者
论文摘要
铀系列中产生的放射性贵重气体RADON-222（$ \ MATHRM {^{^{222} rn} $或RN）在许多地下实验中都是至关重要的背景来源。我们已经估计了空气（空气），氩（AR）和Xenon（XE）气体中RN具有活性碳纤维（ACF）的吸附性。在这项研究中，我们评估了六个ACF，称为A-7，A-10，A-15，A-20，A-25和S-25。我们测量了这些ACF样品的内在放射性，并发现铀系列的A-20放射性为$ <5.5 $ <5.5 $〜$ \ mathrm $ c $ nmbq/kbq/k.90 $ $ nmbq/kq/k.90在空气和AR气体中，我们发现ACF A-15的吸附效率在RN吸附饱和之前的最大减少$ 1/10000 $，而饱和后的$ 97 \％$ $ $ $ $ $。在XE气体中，我们发现ACF A-20在测试的ACF中具有最佳的RN吸附能力。我们还发现S-25，A-25和A-15具有相似的RN吸附性能。
The radioactive noble gas radon-222 ($\mathrm{^{222}Rn}$, or Rn) produced in the uranium series is a crucial background source in many underground experiments. We have estimated the adsorption property of Rn with Activated Carbon Fibers (ACFs) in air (Air), argon (Ar), and xenon (Xe) gas. In this study, we evaluated six ACFs, named A-7, A-10, A-15, A-20, A-25, and S-25, provided from UNITIKA Ltd. We measured intrinsic radioactivity of these ACF samples, and found A-20's radioactivity of the uranium series is $<5.5$~$\mathrm{mBq/kg}$ with $90\%$ confidence level. In Air and Ar gas, we found ACF A-15 has the adsorption efficiency of $1/10000$ reduction at maximum before saturation of Rn adsorption, and more than $97\%$ adsorption efficiency after the saturation. In Xe gas, we found ACF A-20 has the best Rn adsorption ability among tested ACFs. We also found S-25, A-25, and A-15 have similar Rn adsorption performance.
