Mapping 238U decay chain equilibrium state in thin sections of geo-materials by digital autoradiography and microprobe analysis
A new approach is proposed in order to spatially localize and determine the equilibrium state of natural decay chains on hand-scale geological samples, thanks to a combination of three techniques: 1) Elementary chemical mapping by microprobe; 2) Alpha autoradiograph by gaseous detectors and 3) bulk...
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| Veröffentlicht in: | Applied radiation and isotopes 2018-10, Vol.140, p.228-237 |
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| creator | Angileri, Axel Sardini, Paul Donnard, Jérôme Duval, Samuel Lefeuvre, Hugo Oger, Tugdual Patrier, Patricia Rividi, Nicolas Siitari-Kauppi, Marja Toubon, Hervé Descostes, Michael |
| description | A new approach is proposed in order to spatially localize and determine the equilibrium state of natural decay chains on hand-scale geological samples, thanks to a combination of three techniques: 1) Elementary chemical mapping by microprobe; 2) Alpha autoradiograph by gaseous detectors and 3) bulk alpha particle spectrometry. The quantitative nature of alpha autoradiograph and its comparison with U chemical maps allows to locate radioactive equilibrium state in four samples. This equilibrium state was confirmed by alpha spectrometry analysis.
•A new method for localisation and determination of secular equilibrium state is proposed for 238U decay chain radio-isotopes.•The method combines three completely independent techniques.•Radioactive equilibrium and disequilibrium was localised in micrometric scale on three ore and one fresh tailing samples. |
| doi_str_mv | 10.1016/j.apradiso.2018.06.018 |
| format | Article |
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The quantitative nature of alpha autoradiograph and its comparison with U chemical maps allows to locate radioactive equilibrium state in four samples. This equilibrium state was confirmed by alpha spectrometry analysis.
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| ispartof | Applied radiation and isotopes, 2018-10, Vol.140, p.228-237 |
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| language | eng |
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| source | Elsevier ScienceDirect Journals |
| subjects | Alpha particle Alpha spectrometry Catalysis Chemical Sciences Digital autoradiography Radioactive equilibrium Uranium |
| title | Mapping 238U decay chain equilibrium state in thin sections of geo-materials by digital autoradiography and microprobe analysis |
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