Nucleogenic 36 Cl, 236 U and 239 Pu in uranium ores
Wilcken, Klaus; Fifield, L. Keith; Barrows, Timothy T.; Tims, Stephen; Gladkis, Laura
The nucleogenic isotopes 36Cl, 236U and 239Pu are produced naturally in subsurface environments via neutron capture of thermal and epithermal neutrons. Concentrations are, however, very low and accelerator mass spectrometry (AMS) is required for quantitative measurements. A particular challenge is presented by the measurement of 236U/238U ratios down to the level of 10-13 that is expected from rocks with low uranium concentration. Here, we present the AMS methodology that has been developed at...[Show more]
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|Source:||Nuclear Instruments and Methods in Physics Research: Section B|
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