Sanford实验室和DUSEL实验放射性本底特性的初步结果
Early Results on Radioactive Background Characterization for Sanford Laboratory and DUSEL Experiments
摘要：
在Homestake矿深地下实验室测量外部背景源是计划中的低本底实验的重要一步。利用碘化钠探测器和蒙特卡罗模拟研究了Homestake矿不同水平的自然发生的$γ$射线通量。一个简单的算法被开发用于将测量的$γ$射线速率转换成$γ$射线通量。一个很好的协议之间的测量和模拟的$γ$ -射线通量实现与岩石中的化学成分和放射性水平的知识。通过蒙特卡罗模拟对不同能级的中子通量和$γ$射线通量进行了预测，包括为计划中的低本底实验正在建设的不可接近能级。
英文摘要：
Measuring external sources of background for a deep underground laboratory at the Homestake Mine is an important step for the planned low-background experiments. The naturally occurring $γ$-ray fluxes at different levels in the Homestake Mine are studied using NaI detectors and Monte Carlo simulations. A simple algorithm is developed to convert the measured $γ$-ray rates into $γ$-ray fluxes. A good agreement between the measured and simulated $γ$-ray fluxes is achieved with the knowledge of the chemical composition and radioactivity levels in the rock. The neutron fluxes and $γ$-ray fluxes are predicted by Monte Carlo simulations for different levels including inaccessible levels that are under construction for the planned low background experiments.
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