J Radiat Prot > Volume 30(4);2005 > Article
 Distribution and characteristics of radioactivity$(^{232}Th,;^{226}Ra,;^{40}K,;^{137}Cs;and;^{90}Sr)$ and radiation in Korea Yun, Ju-Yong;Choi, Seok-Won;Kim, Chang-Kyu;Moon, Jong-Yi;Rho, Byung-Hwan; 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.
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