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Report No.

Analysis of $$^{137}$$Cs accumulated ${it Amanita caesareoides}$ in Fukushima

Sakamoto, Fuminori ; Kozai, Naofumi  ; Guido-Garcia, F.; Grambow, B.

Much $$^{137}$$Cs derived from Fukushima Daiichi Nuclear Power Plant is still staying in the forest area in Fukushima. As a part of elucidation study of the $$^{137}$$Cs circulation mechanism in a forest, we measured $$^{137}$$Cs radioactivity of egg mushrooms (${it Amanita caesareoides}$) which growth wild in Kawamata city in Fukushima at the each growth stages (egg like state, immaturity, maturity, after maturity) and each parts (pileus and stem). As a result, we confirmed they accumulate $$^{137}$$Cs at the stage egg and mature more than the other stages. It is difficult to estimate exactly because the immature sample was slightly one. The radioactivity of $$^{137}$$Cs in the samples after maturity decreased. It is suggested that they release again as a fruit bodies die. As the result of comparison of $$^{137}$$Cs radioactivity in the pileus and stem, pileus accumulates $$^{137}$$Cs more than stem.



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