Measurement of transuranic elements,chiefly 237Np (by neutron activation analysis), in the physical and biological compartments of the French shore of the English channel |
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Institution: | 1. School of Marine Sciences, Sun Yat-sen University, Zhuhai 519082, PR China;2. Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Guangzhou 510275, PR China;3. Centro Nacional de Aceleradores,Sevilla 41092, Spain;4. Program in Atmospheric and Oceanic Sciences, Princeton University,Princeton, NJ 08540-6654, USA;5. School of Natural Resource and Surveying, Nanning Normal University, Nanning 530001, PR China |
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Abstract: | The behaviour of transuranic elements in the marine environment has been studied via both in situ sampling and laboratory tracer experiments. In particular, the radionuclide 237Np was investigated and techniques for its quantitative determination are described. In the field investigations, a preliminary separation of Np from samples was performed prior to neutron activation analysis, with subsequent γ-ray spectrometry of 238Np. In the laboratory studies, 237Np was determined by a radiochemical method followed by α-spectrometry. The results obtained from the in situ study in the English Channel (sea water, seaweed, molluscs) and from laboratory-uptake experiments (water and mussels) are described. Levels of Pu, Am and Np are compared and the characteristics of neptunium transfer to molluscs are discussed. |
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