从精密表面去除氡 progeny
Removal of radon progeny from delicate surfaces
AI总结：
本研究通过简单清洁方法有效去除铜和硅表面的氡 progeny，从而降低实验对空气暴露时间的要求，节省成本和时间。
摘要：
$^{210}Po$ 通过α衰变驱动的中子背景是许多稀有事件搜索实验的担忧。由于其放射性成分取决于部件的空气暴露历史，这是一个难以控制的背景。在本研究中，我们证明通过用浸有乙酸乙酯的湿组织擦拭铜样品，以及用浸有乙酸乙酯的棉球擦拭硅探测器，可以相对容易地从铜和硅表面去除约一半的氡 progeny $^{210}Po$。对于铜样品，我们证明长寿命的$^{210}Pb$ 以类似的效果被去除。对于铜，分配最长计数时间时，额外擦拭效果不大。对于硅，去除效果具有较大的不确定性。额外清洁显示有微小但统计显著的效果。利用这一简单的清洁步骤将允许实验放松对施工期间允许空气暴露时间的要求，从而节省成本和时间。
英文摘要：
$^{210}Po$ $α$-decay driven neutron background is a concern for many rare event search experiments. It is a difficult to control background because its radiogenic component depends on the air exposure history of parts. In this study, we demonstrate that about half of the radon progeny $^{210}Po$ can be removed from copper and silicon surfaces relatively easily by wiping a copper sample with acetone wetted tissue and a silicon detector with acetone soaked cotton balls. For a copper sample we demonstrate that long-lived $^{210}Pb$ is removed with similar effectiveness. For copper, allocated the longest counting time, additional wiping was found to be largely ineffective. For silicon, the removal effectiveness has large uncertainties. Additional cleaning showed a small but statistically significant effect. Capitalizing on this trivial cleaning step will allow experiments to relax their requirements on the allowable air exposure time during construction, leading to cost and time savings.
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