Progress towards electron–photon coincidence detection of noble gases for enhanced safety monitoring of nuclear fuel

IF 2.8 3区物理与天体物理 Q3 CHEMISTRY, PHYSICAL

Radiation Physics and Chemistry Pub Date : 2025-03-21 DOI:10.1016/j.radphyschem.2025.112703

S.E. Poulton , P.H. Regan , S.J. Bell , R. Shearman , M.A. Goodwin , E.B. O’Sullivan , M. Ryan

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引用次数: 0

Abstract

The conditions under which nuclear fission occurs affects the ratio of radio-xenon isotopes and their metastable states which are produced. Measuring the ratio can be used to monitor the condition of nuclear fuel through its life span. This conference paper presents preliminary results from the testing of an electron–photon coincidence system at resolving signals from two isotopes of radio-xenon compared to the background. The detector system is comprised of a PIPSBox silicon detector and a high-purity germanium detector, with signals from both detectors processed using a 500 MHz CAEN digitiser. The system was tested using a mixed gaseous source containing

^{131 m}

Xe (t

_{1 / 2}

=11.84(4) days) and ¹³³Xe (t

_{1 / 2}

=5.25475(5) days). The preliminary results show a clear separation between events associated with the discrete-energy internal conversion lines associated with the

^{131 m}

Xe decay and the coincident characteristic Xe K

_{α}

and K

_{β}

X-rays and those events associated with the beta decay from the ground state of ¹³³Xe to excited states in the ¹³³Cs daughter nucleus.

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稀有气体电子-光子符合探测技术在加强核燃料安全监测方面的进展

核裂变发生的条件影响所产生的放射性氙同位素的比率及其亚稳态。测量该比值可用于监测核燃料在整个寿命期内的状态。这篇会议论文介绍了一个电子-光子符合系统的初步测试结果，该系统在与背景相比较的情况下分辨来自两种放射性氙同位素的信号。探测器系统由一个PIPSBox硅探测器和一个高纯度锗探测器组成，来自两个探测器的信号使用500 MHz CAEN数字化仪进行处理。系统使用含有131mXe （t1/2=11.84(4)天）和133Xe （t1/2=5.25475(5)天）的混合气体源进行测试。初步结果表明，与131mXe衰变相关的离散能量内部转换线与符合特征的Xe Kα和Kβ x射线相关的事件与133Xe子核中从基态到激发态的β衰变相关的事件之间存在明显的分离。

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来源期刊

Radiation Physics and Chemistry 化学-核科学技术

CiteScore

5.60

自引率

17.20%

发文量

574

审稿时长

12 weeks

期刊介绍： Radiation Physics and Chemistry is a multidisciplinary journal that provides a medium for publication of substantial and original papers, reviews, and short communications which focus on research and developments involving ionizing radiation in radiation physics, radiation chemistry and radiation processing. The journal aims to publish papers with significance to an international audience, containing substantial novelty and scientific impact. The Editors reserve the rights to reject, with or without external review, papers that do not meet these criteria. This could include papers that are very similar to previous publications, only with changed target substrates, employed materials, analyzed sites and experimental methods, report results without presenting new insights and/or hypothesis testing, or do not focus on the radiation effects.