Ultra-low background germanium assay at the Boulby Underground Laboratory
Ultra-low background germanium assay at the Boulby Underground Laboratory
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DOI：
10.1088/1748-0221/19/01/p01017
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发表时间：
2024-01-01
影响因子：
1.3
通讯作者：
Ralet，D.
中科院分区：
文献类型：
--
作者：
Scovell，P. R.;Meehan，E.;Ralet，D.
随着我们进入下一代超低背景粒子物理实验开始设计和构建的时代，利用各种技术以高灵敏度和高速度分析材料的能力将是关键。本文介绍了2017年至2021年期间在Boulby地下实验室安装和调试的Mirion Technologies（堪培拉）专业超低本底探测器。探测器的低背景水平与低背景屏蔽和氡减少干氮吹扫系统相结合，使灵敏度接近世界上最好的，而不需要复杂的屏蔽解决方案。对于优化的样品几何形状，运行100 d，对于中微子双β衰变中感兴趣的背景放射性核素，可能达到接近10 μBq kg-1 （10-12 g/g）。
As we move to an era where next generation ultra-low background particle physics experiments begin to be designed and constructed, the ability to assay materials with high sensitivity and at speed with a variety of techniques will be key. This paper describes the Mirion Technologies (Canberra) specialty ultra-low background detectors installed and commissioned at the Boulby Underground Laboratory between 2017 and 2021. The low background levels of the detectors combine with low background shielding and a radon-reduced dry nitrogen purge system to give sensitivity approaching the best in the world without the need for intricate shielding solutions. For an optimised sample geometry, run for 100 d, it would be possible to reach close to 10 μBq kg-1 (10-12 g/g) for background radionuclides of interest in neutrinoless double-beta decay.