{"title":"用于TENORM污染现场放射性核素分析的移动伽马射线LaBr3（Ce）探测器单元。","authors":"F van Niekerk, P Jones, S Woodborne, R Newman","doi":"10.1016/j.jenvrad.2025.107767","DOIUrl":null,"url":null,"abstract":"<p><p>Gamma-ray spectrometry, primarily utilising NaI(Tl) detectors, is widely used to measure naturally occurring radionuclides in terrestrial environments, but the use of LaBr<sub>3</sub>(Ce) detectors is gaining prominence. Traditionally limited to vehicle-based deployments, access to hostile sites with elevated radiation has been restricted. This study demonstrates the effectiveness of a mobile radiation detection unit (MRDU) equipped with a LaBr<sub>3</sub>(Ce) detector in such environments. The uranium Minimum Detectable Activity was 236 (16) Bq/kg at 1764.5 keV. The MRDU was deployed at the Welverdiend Agricultural Holdings, where elevated uranium levels are expected due to historic gold mining activities in the area., and the uranium activity was measured at 6477 Bq/kg. The uranium disequilibrium was investigated by comparing gamma radiation results with the total uranium concentration obtained through chemical analysis. The comparison confirmed the presence of uranium disequilibrium.</p>","PeriodicalId":15667,"journal":{"name":"Journal of environmental radioactivity","volume":"289 ","pages":"107767"},"PeriodicalIF":2.1000,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A mobile gamma-ray LaBr<sub>3</sub>(Ce) detector unit for in-situ radionuclide analysis at TENORM contamination sites.\",\"authors\":\"F van Niekerk, P Jones, S Woodborne, R Newman\",\"doi\":\"10.1016/j.jenvrad.2025.107767\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Gamma-ray spectrometry, primarily utilising NaI(Tl) detectors, is widely used to measure naturally occurring radionuclides in terrestrial environments, but the use of LaBr<sub>3</sub>(Ce) detectors is gaining prominence. Traditionally limited to vehicle-based deployments, access to hostile sites with elevated radiation has been restricted. This study demonstrates the effectiveness of a mobile radiation detection unit (MRDU) equipped with a LaBr<sub>3</sub>(Ce) detector in such environments. The uranium Minimum Detectable Activity was 236 (16) Bq/kg at 1764.5 keV. The MRDU was deployed at the Welverdiend Agricultural Holdings, where elevated uranium levels are expected due to historic gold mining activities in the area., and the uranium activity was measured at 6477 Bq/kg. The uranium disequilibrium was investigated by comparing gamma radiation results with the total uranium concentration obtained through chemical analysis. The comparison confirmed the presence of uranium disequilibrium.</p>\",\"PeriodicalId\":15667,\"journal\":{\"name\":\"Journal of environmental radioactivity\",\"volume\":\"289 \",\"pages\":\"107767\"},\"PeriodicalIF\":2.1000,\"publicationDate\":\"2025-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of environmental radioactivity\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://doi.org/10.1016/j.jenvrad.2025.107767\",\"RegionNum\":3,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2025/8/7 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"Q3\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of environmental radioactivity","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1016/j.jenvrad.2025.107767","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/8/7 0:00:00","PubModel":"Epub","JCR":"Q3","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
A mobile gamma-ray LaBr3(Ce) detector unit for in-situ radionuclide analysis at TENORM contamination sites.
Gamma-ray spectrometry, primarily utilising NaI(Tl) detectors, is widely used to measure naturally occurring radionuclides in terrestrial environments, but the use of LaBr3(Ce) detectors is gaining prominence. Traditionally limited to vehicle-based deployments, access to hostile sites with elevated radiation has been restricted. This study demonstrates the effectiveness of a mobile radiation detection unit (MRDU) equipped with a LaBr3(Ce) detector in such environments. The uranium Minimum Detectable Activity was 236 (16) Bq/kg at 1764.5 keV. The MRDU was deployed at the Welverdiend Agricultural Holdings, where elevated uranium levels are expected due to historic gold mining activities in the area., and the uranium activity was measured at 6477 Bq/kg. The uranium disequilibrium was investigated by comparing gamma radiation results with the total uranium concentration obtained through chemical analysis. The comparison confirmed the presence of uranium disequilibrium.
期刊介绍：
The Journal of Environmental Radioactivity provides a coherent international forum for publication of original research or review papers on any aspect of the occurrence of radioactivity in natural systems.
Relevant subject areas range from applications of environmental radionuclides as mechanistic or timescale tracers of natural processes to assessments of the radioecological or radiological effects of ambient radioactivity. Papers deal with naturally occurring nuclides or with those created and released by man through nuclear weapons manufacture and testing, energy production, fuel-cycle technology, etc. Reports on radioactivity in the oceans, sediments, rivers, lakes, groundwaters, soils, atmosphere and all divisions of the biosphere are welcomed, but these should not simply be of a monitoring nature unless the data are particularly innovative.
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