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Concentrations and their ratios od $$^{222}$$Rn decay products in rainwater measured by $$gamma$$-ray spectrometry using a low-background Ge detector

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竹安 正則 ; 飯田 孝夫*; 辻本 忠*; 山崎 敬三*; 小川 喜弘*

Takeyasu, Masanori; Iida, Takao*; Tsujimoto, Tadashi*; Yamasaki, Keizo*; Ogawa, Yoshihiro*

雨水中に含まれる$$^{214}$$Pbと$$^{214}$$Biの濃度を低バックグラウンドゲルマニウム検出器を用いて測定した。$$^{214}$$Pbおよび$$^{214}$$Biの濃度は、降雨強度と逆相関の関係にあることがいくつかの降雨イベントで観測された。また、$$^{214}$$Pb濃度に対する$$^{214}$$Biの濃度の比は、降雨強度と弱い逆相関の関係にあることが多かった。降雨によるラドン改変生成物の洗浄過程に関するモデルを仮定し、これらの結果について考察した。

The concentrations of $$^{214}$$Pb and $$^{214}$$Bi in rainwater was measured by a low background Ge detector. The concentrations of $$^{214}$$Pb and $$^{214}$$Bi were inverse relations with rainfall rate in some rainfall events, and the concentration ratio of $$^{214}$$Bi to $$^{214}$$Pb would be a weak inverse relation with rainfall rate. The model was considered about the scavenging effects of rainfall to Radon decay products, and those results were discussed with the model.

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パーセンタイル:48.6

分野:Environmental Sciences

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