An alpha imaging detector for on-site measurement of plutonium and neptunium

IF 2.2 3区物理与天体物理 Q2 NUCLEAR SCIENCE & TECHNOLOGY Radiation Measurements Pub Date : 2025-02-01 Epub Date: 2025-01-06 DOI:10.1016/j.radmeas.2024.107366

Yuki Morishita , David P. DiPrete , Travis Deason , Ryuji Nagaishi

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Abstract

Nuclear fuel materials such as Plutonium (Pu) and Neptunium (Np) are produced as by-products of reprocessing operations, necessitating precise understanding of their contamination distribution within controlled areas for radiation protection. This study presents the development and application of an alpha particle imaging detector for on-site detection of Pu and Np contamination. The detector's performance was evaluated using various alpha sources, demonstrating promising energy resolution and spatial resolution. Subsequently, ²³⁹Pu and ²³⁷Np oxide samples were measured at the Savannah River National Laboratory, showing the detector's effectiveness in on-site applications. The detector enabled simultaneous measurement of radioactivity and energy spectrum of individual particles, facilitating rapid discrimination between ²³⁹Pu and ²³⁷Np. The imaging detector has potential for enhancing on-site detection of alpha nuclides in nuclear facilities, aiding in decontamination efforts and environmental monitoring.

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用于现场测量钚和镎的阿尔法成像探测器

钚（Pu）和镎（Np）等核燃料材料是后处理操作的副产品，需要精确了解其在受控区域内的污染分布，以进行辐射防护。本文介绍了一种用于现场检测Pu和Np污染的α粒子成像探测器的开发和应用。利用各种α源对探测器的性能进行了评估，展示了有希望的能量分辨率和空间分辨率。随后，在萨凡纳河国家实验室测量了239Pu和237Np氧化物样品，显示了探测器在现场应用中的有效性。该探测器能够同时测量单个粒子的放射性和能谱，便于快速区分239Pu和237Np。成像探测器有可能加强对核设施内α -核素的现场探测，帮助消除污染的努力和环境监测。

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来源期刊

Radiation Measurements 工程技术-核科学技术

CiteScore

4.10

自引率

20.00%

发文量

116

审稿时长

48 days

期刊介绍： The journal seeks to publish papers that present advances in the following areas: spontaneous and stimulated luminescence (including scintillating materials, thermoluminescence, and optically stimulated luminescence); electron spin resonance of natural and synthetic materials; the physics, design and performance of radiation measurements (including computational modelling such as electronic transport simulations); the novel basic aspects of radiation measurement in medical physics. Studies of energy-transfer phenomena, track physics and microdosimetry are also of interest to the journal. Applications relevant to the journal, particularly where they present novel detection techniques, novel analytical approaches or novel materials, include: personal dosimetry (including dosimetric quantities, active/electronic and passive monitoring techniques for photon, neutron and charged-particle exposures); environmental dosimetry (including methodological advances and predictive models related to radon, but generally excluding local survey results of radon where the main aim is to establish the radiation risk to populations); cosmic and high-energy radiation measurements (including dosimetry, space radiation effects, and single event upsets); dosimetry-based archaeological and Quaternary dating; dosimetry-based approaches to thermochronometry; accident and retrospective dosimetry (including activation detectors), and dosimetry and measurements related to medical applications.