大亚湾不同介质中^(137)Cs和^(90)Sr的含量及行为特征

Contents and behavior characteristics of ^(137)Cs and ^(90)Sr invarious mediums of Daya Bay

分别用HPGeγ谱方法和放化分离 β计数方法测量了大亚湾海水、沉积物和海洋生物样品的人工放射性核素13 7Cs和90 Sr。计算了海洋生物对13 7Cs和90Sr的浓集因子及其在沉积物和海水中的分配系数。对13 7Cs和90 Sr的含量水平 ,13 7Cs和90 Sr及其与样品中天然放射性核素含量相关性 ,海洋生物对13 7Cs和90 Sr的浓集 ,以及13 7Cs和90 Sr的地球化学进行了讨论。

Cs content in seawaters, sediments and marine organisms collected from Daya bay were determined using HPGe γ spectrometry and 90 Sr contents in those were determined with radiochemistry and β count method. The concentration factors of marine organisms for 137 Cs and 90 Sr and distribution coefficients between sediment and seawater were evaluated. The 137 Cs and 90 Sr content level, content correlation between 137 Cs and 90 Sr and natural nuclides, marine organisms enriching for 137 Cs and 90 Sr, and marine geochemistry of 137 Cs and 90 Sr have been discussed.