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Report No.
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Incorporation record of radionuclides in teeth and otoliths

Koarai, Kazuma   ; Matsueda, Makoto   ; Fujiwara, Kenso ; Ono, Takumi*; Kino, Yasushi*; Oka, Toshitaka   ; Okutsu, Kenichi*; Takahashi, Atsushi*; Suzuki, Toshihiko*; Shimizu, Yoshinaka*; Chiba, Mirei*; Osaka, Ken*; Sasaki, Keiichi*; Ishii, Yumiko*; Hayashi, Seiji*; Sekine, Tsutomu*; Fukumoto, Manabu*; Shinoda, Hisashi*; Kitamura, Akihiro   

We have investigated incorporation of $$^{90}$$Sr and $$^{137}$$Cs in teeth of cattle and otoliths of fish. Specific activity of $$^{90}$$Sr in the dentin tissue was higher than that in the enamel tissue. The result shows change of $$^{90}$$Sr incorporation in cattle even within a tooth. Concentrations of stable Sr and Cs were 94 ppm and 3 ppb. Distributions of stable Sr and Cs were uniform in the otolith of fish. If distribution of $$^{90}$$Sr and $$^{137}$$Cs in the otolith was measured, change of $$^{90}$$Sr and $$^{137}$$Cs incorporation into the fish would be found. These findings suggest that distribution patterns of $$^{90}$$Sr and $$^{137}$$Cs in the environment could be estimated from distribution of the radionuclides in the tooth and otolith.

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