Optimization of a primary X‐ray filter for X‐ray fluorescence analysis of uranium and plutonium
Optimization of a primary X‐ray filter for X‐ray fluorescence analysis of uranium and plutonium
复制标题
用于铀和钚 X 射线荧光分析的初级 X 射线滤光片的优化
DOI：
10.1002/xrs.3067
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Yoshiyuki Oguri,Hiroshi Yoshii
中科院分区：
文献类型：
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作者：
Kota Ishii;Yukie Izumoto;Tsugufumi Matsuyama;Kumiko Fukutsu;Yasuhiro Sakai;Yoshiyuki Oguri,Hiroshi Yoshii
当工人在核燃料处理设施受伤时，很难通过 α 粒子计数来量化锕系元素污染，因为这些粒子被血液屏蔽。为了克服这个问题，我们使用手持式设备进行 X 射线荧光 (XRF) 分析，该设备在不允许采样的情况下非常有用，例如在本研究中。在 XRF 分析中，通常在 X 射线管和样品之间插入由金属箔制成的初级 X 射线滤光片，以衰减目标元素 XRF 信号能量区域的入射 X 射线。这样做可以减少源自入射 X 射线散射辐射的背景信号。在这项研究中，我们的目标是优化初级 X 射线滤光片，以促进对伤口中的铀和钚进行同步高灵敏度分析。为此，对 U 和 Pu 污染的针刺伤口模型进行了 XRF 测量，并研究了过滤材料/厚度与检测限之间的关系。研究发现，优化给定目标元件的过滤材料/厚度可将测量的检测限提高约 10%。
When workers are wounded at a nuclear fuel handling facility, it is difficult to quantify actinide contamination through α‐particle counting because these particles are shielded by blood. To overcome this problem, we used X‐ray fluorescence (XRF) analysis with a handheld‐type device that is useful in cases where sampling is not allowed, such as in this study. In XRF analysis, a primary X‐ray filter made of metal foil is generally inserted between the X‐ray tube and the sample to attenuate the incident X‐ray at the energy region of the XRF signal for the target element. Doing so can reduce the background signal originating from the scattered radiation of the incident X‐ray. In this study, we aimed to optimize a primary X‐ray filter that facilitates simultaneous high‐sensitivity analysis of uranium and plutonium in a wound. For this purpose, XRF measurements were performed for a needle‐puncture wound model contaminated by U and Pu, and the relationship between the filter material/thickness and the detection limit was investigated. Optimizing the filter material/thickness of a given target element was found to improve the detection limit of the measurement by ~10%.