Transfer and uptake of radium in a natural and in a technologically modified radiation environment |
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| Institution: | 1. Department of Earth and Planetary Sciences, Macquarie University, Sydney, NSW 2109, Australia;2. Department of Earth and Environmental Sciences, The University of Iowa, Iowa City, IA 52242, USA;3. School of Geography, Geology and the Environment, Keele University, Keele ST5 5BG, UK;4. School of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ, UK;5. Isotope Geoscience Unit, Scottish Universities Environmental Research Centre, East Kilbride G75 0QF, UK;6. Department of Earth and Planetary Sciences, McGill University, Montreal H3A 0E8, Canada;1. Centro de Estudios Ambientales de Cienfuegos, AP 5. Ciudad Nuclear, CP 59350, Cienfuegos, Cuba;2. International Atomic Energy Agency, Environment Laboratories, 4 Quai Antoine 1er, 98000, Monaco;1. Adelphi Technology, 2003 E Bayshore Rd, Redwood City, CA 94063, United States;2. G&J Jones Enterprice, 7486 Brighton Ct, Dublin, CA 94568, United States;3. Department of Electrical Engineering, Stanford University, Stanford, CA, United States;1. Department of Basic Sciences, Deanship of Preparatory Year and Supporting Studies, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam, 34212, Saudi Arabia;2. Radiation Oncology, Oncology Center, King Saud University Medical City, P.O. Box 7805, Riyadh, 11472, Saudi Arabia;3. Department of Radiological Sciences, College of Applied Medical Sciences, King Saud University, P.O. Box 10219, Riyadh, 11433, Saudi Arabia;4. Prince Sattam bin Abdulaziz University, College of Applied Medical Sciences, Radiology and Medical Imaging Department, P.O. Box 422, Alkharj, 11942, Saudi Arabia;5. Department of Physics and Astronomy, College of Science, P.O. BOX 2455, King Saud University, Riyadh, 11451, Saudi Arabia;6. Centre for Applied Physics and Radiation Technologies, School of Engineering and Technology, Sunway University, Bandar Sunway, 47500, Selangor, Malaysia;7. School of Mathematics and Physics, University of Surrey, Guilford, GU2 7XH, UK;1. Department of Physics, University of Malaya, 50603 Kuala Lumpur, Malaysia;2. Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom;3. Centre for Advanced Research, Department of Physics, Fatima Mata National College, Kollam 691001, Kerala, India;4. Department of Physics, Faculty of Science, Kuwait University, Khaldia, Kuwait |
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| Abstract: | Differentiation in the geochemical transfer and uptake of the nuclides 228Ra and 226Ra is observed to give high nuclide activity ratios, of 228Ra to 226Ra, ranging from 20 to 200 in sediment humus collected from a river subject to pollution. Differentiation of this nature is also observed in the non-ionic non-dialysable fraction of the Ra activity in river water and may be attributed to preferential complexing of 228Ra relative to 226Ra. Biological uptake of the activities produces a similar effect. The ratios are higher in a natural radiation environment than in a technologically enhanced one, indicating the influence of nuclide availability. |
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