AI 中文总结
本研究针对SUPL地下实验室的氡析出问题，采用AIRTHINGS Corentium Pro探测器测量，证实加装HDPE阻隔层可将表面氡浓度抑制约96%，为低本底实验提供了可行的氡抑制方案。
AI 中文摘要
氡诱导本底仍是地下实验室开展低本底实验的限制因素，这类实验室的封闭性会导致氡浓度升高，周围岩石的析出是氡的主要来源。本研究对斯托韦尔地下物理实验室（SUPL）主实验大厅地面的氡析出开展原位研究，探究使用高密度聚乙烯（HDPE）阻隔层抑制氡析出的效果。在阻隔层安装前后，采用AIRTHINGS Corentium Pro无源探测器测量表面氡析出，结果显示表面析出装置内的平衡氡浓度从5840±50 Bq·m⁻³降至259±3 Bq·m⁻³，对应抑制率约96%。这些结果表明，在实际地下条件下加装氡阻隔层以抑制表面氡析出具有可行性，支持其应用于SUPL规划中的低本底设施，以及其他地下实验室的未来应用。
英文摘要
Radon-induced backgrounds remain a limiting factor in low-background experiments conducted in underground laboratories. The enclosed nature of these laboratories can result in elevated radon levels, with emanation from the surrounding rock representing the primary source of radon. In this work, we present an in-situ study of radon emanation from the floor of the main experimental hall at the Stawell Underground Physics Laboratory (SUPL) and investigate the use of a high-density polyethylene (HDPE) barrier to suppress emanation. Surface emanation was measured using an AIRTHINGS Corentium Pro passive detector before and after installation of the barrier. The equilibrium radon concentration within the surface emanation setup was reduced from 5840 $\pm$ 50 Bq m $^{-3}$ to 259 $\pm$ 3 Bq m$^{-3}$, corresponding to a suppression of $\sim$96%. These results demonstrate the potential to retrofit radon barriers to suppress surface emanation under realistic underground conditions, supporting their use in planned low-background infrastructure at SUPL and future applications at other underground laboratories.
