Compact Beta-Gamma Radioxenon Detection System with Improved Energy Resolution Using PIPS Detector

IF 1.9 4区 地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS pure and applied geophysics Pub Date : 2024-06-17 DOI:10.1007/s00024-024-03487-z
Sepideh Alsadat Azimi, Hossein Afarideh, Jong-Seo Chai
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Abstract

The monitoring of four radioxenon isotopes stands out as a key technology employed in detecting underground nuclear tests. In support of the Comprehensive Nuclear-Test-Ban Treaty (CTBT), we develop and calibrate a novel radioxenon detection system based on beta-gamma coincidence, utilizing NaI(Tl) and silicon detectors for gamma and beta radiation detection. To assess its performance, the prototype detection system undergoes rigorous testing with 222Rn and 131mXe sources. A 166mHo source is employed for energy calibration and performance evaluation of the silicon detector. In this study, we aim to investigate the utility of these materials and methods for a radioxenon detection system to achieve higher energy resolution while minimizing memory effects compared to conventional systems that employed plastic scintillator detectors. Our results demonstrate a significantly improved energy resolution of 7.8% (factor of ~ 3 × compared to plastic detectors) at the 129 keV conversion electron peak of 131mXe. The improved system is a foundation for the development of operational systems with optimized geometry for the discrimination of radioxenon isotopes.

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利用 PIPS 探测器提高能量分辨率的紧凑型β-γ 射线氙探测系统
监测四种放射性氙同位素是探测地下核试验的一项关键技术。为支持《全面禁止核试验条约》(CTBT),我们利用 NaI(Tl)和硅探测器进行伽马和贝塔辐射探测,开发并校准了基于贝塔-伽马重合的新型放射性氙探测系统。为了评估其性能,原型检测系统使用 222Rn 和 131mXe 源进行了严格的测试。166mHo 源用于硅探测器的能量校准和性能评估。与使用塑料闪烁体探测器的传统系统相比,本研究旨在研究这些材料和方法在放射性氙探测系统中的实用性,以实现更高的能量分辨率,同时最大限度地减少记忆效应。我们的研究结果表明,在 131mXe 的 129 keV 转换电子峰,能量分辨率大幅提高了 7.8%(与塑料探测器相比提高了约 3 倍)。改进后的系统为开发具有优化几何形状的运行系统奠定了基础,可用于辨别放射性氙同位素。
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来源期刊
pure and applied geophysics
pure and applied geophysics 地学-地球化学与地球物理
CiteScore
4.20
自引率
5.00%
发文量
240
审稿时长
9.8 months
期刊介绍: pure and applied geophysics (pageoph), a continuation of the journal "Geofisica pura e applicata", publishes original scientific contributions in the fields of solid Earth, atmospheric and oceanic sciences. Regular and special issues feature thought-provoking reports on active areas of current research and state-of-the-art surveys. Long running journal, founded in 1939 as Geofisica pura e applicata Publishes peer-reviewed original scientific contributions and state-of-the-art surveys in solid earth and atmospheric sciences Features thought-provoking reports on active areas of current research and is a major source for publications on tsunami research Coverage extends to research topics in oceanic sciences See Instructions for Authors on the right hand side.
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