Mapping 238 U 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 2018-06, Vol.140, p.228
Hauptverfasser: Angileri, Axel, Sardini, Paul, Donnard, Jérôme, Duval, Samuel, Lefeuvre, Hugo, Oger, Tugdual, Patrier, Patricia, Rividi, Nicolas, Siitari-Kauppi, Marja, Toubon, Hervé, Descostes, Michael
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Sprache:eng
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Zusammenfassung: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.
ISSN:1872-9800
DOI:10.1016/j.apradiso.2018.06.018