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首页> 外文期刊>Iranian Journal of Science >Emission Pattern of NORMs and ~(137)Cs in the Sediments of the Gaz River and the Gorgan Bay, North Iran
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Emission Pattern of NORMs and ~(137)Cs in the Sediments of the Gaz River and the Gorgan Bay, North Iran

机译：Emission Pattern of NORMs and ~(137)Cs in the Sediments of the Gaz River and the Gorgan Bay, North Iran

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摘要

Information on the distribution and emission patterns of natural and artificial radionuclides and their radiation level in the environment is very important for assessing the health effects of people living in a given region. In this study, the specific activity of radionuclides was measured using high purity germanium detector and a map of their distribution was drawn. The samples were collected from the Gaz River sediment in northern Iran, in the mountains of Golestan Province, and sediments on the middle and southern side of Gorgan Bay. The average of specific activities of ~(226)Ra, ~(232)Th, ~(40)K, and ~(137)Cs was 17.61, 35.91, 398.65, and 4.01 Bq/kg, respectively, which for natural radioactive nuclei are lower than the global average. The highest concentration of ~(40)K was obtained in the sediments of the Gaz River estuary due to the use of potassium fertilizers for agriculture in this region. The highest concentration of ~(137)Cs was obtained in the sediments of Gorgan Bay because ~(137)Cs is injected both directly through the atmosphere and transfer by river water from upstream points to the Gorgan Bay. The diffusion pattern of ~(137)Cs in the Gorgan Bay was exactly the opposite of ~(232)Th and showed the tendency of ~(137)Cs to precipitate in calm areas in the middle of the Bay.

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