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11f Long-term behaviour of ~(90)Sr and ~(137)Cs in surface water in Finland

机译:芬兰地表水中的11F〜(90)SR和〜(137)CS的长期行为

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Activity concentrations of two long-lived radionuclides, ~(90)Sr and ~(137)Cs, have been determined from water of five large rivers discharging from the mainland to the Gulf of Finland and Gulf of Bothnia since 1965, and of several lakes and rivers in various large drainage areas in Finland since 1986. In the 1960s those radionuclides originated from athmospheric nuclear weapon tests. In the 1970s and 80s small peaks in surface water were caused by the Chinese nuclear weapon tests. The depositions of ~(137)Cs and ~(90)Sr during the nuclear weapon test period were distributed almost evenly in Finland. ~(137)Cs/~(90)Sr in deposition varied within 1.4 +- 0.2 at various survey stations. The Chernobyl depositions of ~(137)Cs and ~(90)Sr, on the contrary, were most unevenly distributed in Finland.
机译:两种长寿命的放射性核素,〜(90)Sr和〜(137)Cs的活性浓度已从大陆从大陆排放到芬兰湾和自1965年以来的芬兰海湾,以及几个湖泊自1986年以来芬兰各种大型排水区的河流。在20世纪60年代,那些放射性核素起源于运动核武器测试。在20世纪70年代和80年代的地表水中的小峰是由中国核武器测试引起的。在核武器测试期间的〜(137)CS和〜(90)SR的沉积几乎均匀地分布在芬兰。 〜(137)CS /〜(90)SR沉积在各种测量站的1.4 + - 0.2内变化。相反,〜(137)CS和〜(90)SR的切甲骨沉积最不均匀地分布在芬兰。

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