The uranium content and the activity ratio234U/238U in marine organisms and sea water in the western North Pacific |
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| Authors: | Yasuo Miyake Yukio Sugimura Masaru Mayeda |
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| Institution: | (1) Tokyo Kyoiku University, Tokyo, Japan;(2) Meteorological Research Institute, Tokyo |
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| Abstract: | The uranium content and activity ratio A234U/A238U were determined in open ocean water, marine plankton, marine algae and sea water in the environment in which plankton and
algae live. The average uranium content of 3.34±0.28×10−6 g/l and the average activity ratio of 1.13±0.04 were obtained in open ocean water. The uranium contents in plankton and algae
were respectively from 1.7 to 7.8×10−7 g/g and 0.4 to 23.5×10−7 g/g on dry basis with the respective concentration factors of 48 to 260 and 10 to 733. The activity ratio in plankton and
algae ranged from 1.07 to 1.18 which coincided well with those in the environmental sea water. |
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