制备伽马能谱仪用本地放射性空气过滤器标准物质

IF 1 4区 工程技术 Q4 INSTRUMENTS & INSTRUMENTATION MAPAN Pub Date : 2024-01-10 DOI:10.1007/s12647-023-00721-2
A. C. Patra, Pradyumna Lenka, V. K. Thakur, C. G. Sumesh, S. K. Jha, M. S. Kulkarni
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引用次数: 0

摘要

伽马能谱仪技术通常用于定量检测环境基质和其他合成样品中不同的伽马放射性核素。这是一种非破坏性比较技术,需要使用国际原子能机构(IAEA)、美国国家标准与技术研究院(NIST)等国际机构提供的认证参考材料。这些认证参考材料供应有限且价格昂贵,严重阻碍了辐射测量实验室对它们的获取,因此需要在本国进行制备。在标准几何形状中,通过重量和体积测量法向滤纸中添加不同活度的 226Ra,共制备了五套两种类型的滤纸和一块空白。在以 HPGe 为基础的高分辨率伽马能谱系统上,两种滤纸标准品在选定几何形状下的效率合计为 19.7% 至 20.3%。据观察,MDA 值也适用于环境空气微粒测量。所获得的效率值和 MDA 值表明,这些空气滤纸标准可以作为常规伽马能谱计数滤纸介质上空气微粒的候选参考标准。
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Preparation of Indigenous Radioactive Air Filter Standard for Gamma Spectrometry

Gamma spectrometry technique is regularly used for the quantification of different gamma-emitting radionuclides in environmental matrices and other synthetic samples. This is a non-destructive comparative technique which requires the usage of Certified Reference materials from International agencies like IAEA, NIST, etc. Limited availability and high cost of these Certified Reference materials pose a major hindrance in their acquisition by radiometric laboratories, motivating their indigenous preparation. A total of five sets of two types of filter papers and one blank were prepared by spiking with variable activity of 226Ra by gravimetric and volumetric measurements in a standard geometry. Efficiency of both filter paper standards together, varied from 19.7 to 20.3% in the selected geometry on HPGe-based high-resolution gamma spectrometry system. MDA values were also observed to be suitable for environmental air particulate measurements. The values of efficiencies and MDA obtained indicate that these air filter standards can qualify as candidate reference standards for regular gamma spectrometric counting of air particulates on filter paper media.

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来源期刊
MAPAN
MAPAN 工程技术-物理:应用
CiteScore
2.30
自引率
20.00%
发文量
91
审稿时长
3 months
期刊介绍: MAPAN-Journal Metrology Society of India is a quarterly publication. It is exclusively devoted to Metrology (Scientific, Industrial or Legal). It has been fulfilling an important need of Metrologists and particularly of quality practitioners by publishing exclusive articles on scientific, industrial and legal metrology. The journal publishes research communication or technical articles of current interest in measurement science; original work, tutorial or survey papers in any metrology related area; reviews and analytical studies in metrology; case studies on reliability, uncertainty in measurements; and reports and results of intercomparison and proficiency testing.
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