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Distribution and characteristics of radioactivity$(^{232}Th,\;^{226}Ra,\;^{40}K,\;^{137}Cs\;and\;^{90}Sr)$ and radiation in Korea  

Yun, Ju-Yong (Korea Institute of Nuclear Safety)
Choi, Seok-Won (Korea Institute of Nuclear Safety)
Kim, Chang-Kyu (Korea Institute of Nuclear Safety)
Moon, Jong-Yi (Korea Institute of Nuclear Safety)
Rho, Byung-Hwan (Korea Institute of Nuclear Safety)
Publication Information
Journal of Radiation Protection and Research / v.30, no.4, 2005 , pp. 167-174 More about this Journal
Abstract
The concentrations of natural and artificial radionuclides in soil and gamma ray dose rate in air at 233 locations in Korea have been determined. The national mean concentrations of $^{232}Th,\;^{226}Ra,\;^{40}K,\;^{137}Cs\;and\;^{90}Sr$ in soil were $60{\pm}31,\;33{\pm}14,\;673{\pm}238,\;35{\pm}9.3\;and\;5.0{\pm}3.4\;Bq\;kg^{-1}$, respectively. The mean gamma-ray dose rate at 1 m above the ground was $7918\;nGy\;h^{-1}$. $^{137}Cs$ concentration had highly significant correlation with organic matter content and cation exchange capacity. $^{90}Sr$ concentration had slightly coherent with pH. The results have been compared with other global radioactivity and radiation measurements.
Keywords
natural radionuclide; artificial radionuclide; soil; gamma ray dose rate;
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