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Natural Radioactivity of Soils by Bed Rocks Distributed in the Keum River Area  

Lee, Kil-Yong (Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources)
Yoon, Yoon-Yeol (Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources)
Cho, Soo-Young (Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources)
Lee, Jung-Hwa (Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources)
Lee, Jin-Soo (Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources)
Koh, Kyung-Seok (Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources)
Kim, Yong-Je (Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources)
Publication Information
Journal of Soil and Groundwater Environment / v.14, no.2, 2009 , pp. 10-16 More about this Journal
Abstract
Characteristics of natural radioactivity were investigated for soils collected from seven sites of different bed rocks distributed in the Keum River area of Korea by the use of a Gamma-ray spectrometry. Specific activity (SA) and SA ratio (SAR) of typical naturally occurring radioactive nuclide such as $^{226}$Ra, $^{228}$Ac and $^{40}$K were determined for the soil samples. The SA values of $^{226}$Ra, $^{228}$Ac and $^{40}$K in 41 soils of 7 sites are 26.7-485 (74.2 ${\pm}$ 72.2), 30.9-157 (90.7 ${\pm}$ 32.7) and 203-1558 (990 ${\pm}$ 203) Bq/kg, respectively. The SA of $^{226}$Ra has very different values by the soils and the sites. Especially the SA of $^{226}$Ra in a soil sample of Ogcheon site is 485 Bq/kg while most SA of 41 soil samples are < 100 Bq/kg. SA of $^{228}$Ac has a little different values with the soils and sites, however the SA of $^{40}$K has almost constant values in all soil samples. The SAR values of $^{26}$Ra/$^{228}$Ac, $^{226}$Ra/$^{40}$K and $^{228}$Ac/$^{40}$K in 41 soils of 7 sites are 0.343-6.11 (0.865 ${\pm}$ 0.883), 0.0258-0.759 (0.0814 ${\pm}$ 0.1l17) and 0.0373-0.178 (0.0945 ${\pm}$ 0.0373), respectively. The SARs of $^{226}$Ra/$^{228}$Ac and $^{226}$Ra/$^{40}$K have very different values by the soils and the sites, however the SAR of $^{228}$Ac/$^{40}$K has a little difference by the soil and sites.
Keywords
Natural radioactivity; the Keum River; Bed rock; Soil; Gamma-ray spectrometry;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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