Li2100deplMoO4 闪闪发光的博洛米特用于罕见事件搜索实验
Iulian C Bandac1, Alexander S Barabash2, Laurent Bergé3
1Laboratorio Subterráneo de Canfranc, 22880 Canfranc-Estación, Spain.
Sensors (Basel, Switzerland)
|July 8, 2023
概括
我们开发了使用耗尽的-100.00的新型聚酸盐闪闪发光的玻利米仪. 这些探测器表现出卓越的性能和高的放射性纯度,使得它们对罕见事件的搜索具有前景.
科学领域:
- 实验物理学的实验物理.
- 低温探测器 低温探测器 低温探测器
- 核天体物理学 核天体物理学
背景情况:
- 闪的博洛米特对于罕见事件的搜索至关重要.
- 在以前的实验中,使用了富含-100的酸晶体.
- 开发含有枯竭-100的探测器对于背景减少至关重要.
研究的目的:
- 开发和描述使用含有贫-100 (Li2100deplMoO4) 的聚酸盐晶体的闪闪发光的博洛米特.
- 为了评估这些探测器在能量分辨率,闪光信号和放射性纯度方面的性能.
- 评估它们对未来罕见事件搜索实验的潜力.
主要方法:
- 2100deplMoO4晶体的合成和净化.
- 制造立方玻洛米特样品 (45毫米侧面,0.28公斤质量).
- 在冷装置中使用博洛米特式Ge探测器检测闪光子 (Canfranc地下实验室的CROSS).
主要成果:
- 2100deplMoO4闪波计表现出卓越的光谱学性能 (3-6 keV FWHM在0.24-2.6 MeV).
- 观察到温和的闪光与热能比率 (0.3-0.6 keV/MeV).
- 实现了高放射性纯度,228Th和226Ra活动低于几μBq/kg.
结论:
- 开发的Li2100deplMoO4闪波计的性能与最先进的低温探测器相美.
- 它们的优良特性和高放射性纯度使得它们非常适合用于罕见事件搜索实验.
- 这些发现为在未来寻找罕见核过程时提高敏感度铺平了道路.
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