Abstract
The transfer factors of long-lived radionuclides from soil to polished rice were measured by ICP-MS and conventional radiometric methods. The transfer factors showed the following tendency, alkali metals: K≥Rb>137Cs>Cs, alkaline earth metals: Ca≥90Sr>Sr>Ba, lanthanoids: Eu>La⋅Ce⋅Nd⋅Sm⋅Gd⋅Lu. The transfer factors (average) of typical elements were as follows, 40K : 1.0×10-1, Rb: 3.3×10-2, 137Cs: 2.6×10-3, 90Sr: 3.8×10-3, Ba: 5.0×10-4, La: 1.5×10-4, Eu: 5.8×10-4, Bi: 2.2×10-4, Th: 1.5×10-4, U: 1.9×10-4.
It was found that the transfer factors of radioactive (fallout) 90Sr and 137Cs were 3-5 times higher than those of stable (native) Sr and Cs, respectively.
