用于XENONnT探测器低能电子后坐力校准的220Rn源的特性

IF 1.3 4区工程技术 Q3 INSTRUMENTS & INSTRUMENTATION

Journal of Instrumentation Pub Date : 2023-11-01 DOI:10.1088/1748-0221/18/11/p11009

Florian Jörg, Shengchao Li, Jochen Schreiner, Hardy Simgen, Rafael F. Lang

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引用次数: 0

摘要

摘要低本底液态氙探测器被用于研究暗物质和无中微子双β衰变等罕见事件。对于它们的校准，可以使用气态220 Rn。引入氙后，其子代同位素212pb诱导均匀分布的低能(30 keV)电子反冲相互作用。我们报告了在XENONnT实验中使用的这种源的特性。它由四个商业上可获得的228 Th源组成，活度为55kbq。这些源提供了大约8kbq的高220 Rn辐射率。我们没有发现超过1.7 mBq的长寿命228 Th释放的迹象。虽然观测到的222 Rn辐射率出乎意料，约为3.6 mBq，但该源仍然符合XENONnT实验的要求。

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Characterization of a ²²⁰Rn source for low-energy electronic recoil calibration of the XENONnT detector

Low-background liquid xenon detectors are utilized in the investigation of rare events, including dark matter and neutrinoless double beta decay. For their calibration, gaseous 220Rn can be used. After being introduced into the xenon, its progeny isotope 212Pb induces homogeneously distributed, low-energy (<30 keV) electronic recoil interactions. We report on the characterization of such a source for use in the XENONnT experiment. It consists of four commercially available 228Th sources with an activity of 55 kBq. These sources provide a high 220Rn emanation rate of about 8 kBq. We find no indication for the release of the long-lived 228Th above 1.7 mBq. Though an unexpected 222Rn emanation rate of about 3.6 mBq is observed, this source is still in line with the requirements for the XENONnT experiment.

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来源期刊

Journal of Instrumentation 工程技术-仪器仪表

CiteScore

2.40

自引率

15.40%

发文量

827

审稿时长

7.5 months

期刊介绍： Journal of Instrumentation (JINST) covers major areas related to concepts and instrumentation in detector physics, accelerator science and associated experimental methods and techniques, theory, modelling and simulations. The main subject areas include. -Accelerators: concepts, modelling, simulations and sources- Instrumentation and hardware for accelerators: particles, synchrotron radiation, neutrons- Detector physics: concepts, processes, methods, modelling and simulations- Detectors, apparatus and methods for particle, astroparticle, nuclear, atomic, and molecular physics- Instrumentation and methods for plasma research- Methods and apparatus for astronomy and astrophysics- Detectors, methods and apparatus for biomedical applications, life sciences and material research- Instrumentation and techniques for medical imaging, diagnostics and therapy- Instrumentation and techniques for dosimetry, monitoring and radiation damage- Detectors, instrumentation and methods for non-destructive tests (NDT)- Detector readout concepts, electronics and data acquisition methods- Algorithms, software and data reduction methods- Materials and associated technologies, etc.- Engineering and technical issues. JINST also includes a section dedicated to technical reports and instrumentation theses.