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Florence Guéguen Hélène Isnard Karsten Kossert Carole Bresson Céline Caussignac Guillaume Stadelmann Anthony Nonell Sébastien Mialle Frédéric Chartier 《Journal of Radioanalytical and Nuclear Chemistry》2014,302(1):289-295
A methodology to purify a 166mHo solution has been developed by a combination of activity and mass concentration measurements in order to further determine the 166mHo half-life. The isobaric interference at m/q ? 166 requires Ho purification from non-natural Er with a high purification degree due to the large amount of Ho as opposed to Er. The Ho/Er separation was achieved using high-performance liquid chromatography on a semi-preparative column followed by purification on gravitational chromatography. The efficiency of the separation was evaluated after precise determination of the Er isotopic composition. The purification methodology enabled to separate Ho from Er. 相似文献
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Jakopič R. Aregbe Y. Richter S. Zuleger E. Mialle S. Balsley S. D. Repinc U. Hiess J. 《Journal of Radioanalytical and Nuclear Chemistry》2017,311(3):1781-1791
In the frame of the accountancy measurements of the fissile materials, reliable determinations of the plutonium and uranium content in spent nuclear fuel are required to comply with international safeguards agreements. Large-sized dried (LSD) spikes of enriched 235U and 239Pu for isotope dilution mass spectrometry (IDMS) analysis are routinely applied in reprocessing plants for this purpose. A correct characterisation of these elements is a pre-requirement for achieving high accuracy in IDMS analyses. This paper will present the results of external verification measurements of such LSD spikes performed by the European Commission and the International Atomic Energy Agency.
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M. Sturm S. Richter Y. Aregbe R. Wellum S. Mialle K. Mayer T. Prohaska 《Journal of Radioanalytical and Nuclear Chemistry》2014,302(1):399-411
This article discusses the age dating results of plutonium/uranium chronometers with a focus on the consequences for age plutonium determination when the basic assumptions of the methodology are not fully met: Incomplete removal of the daughter nuclides at the production date and uranium contamination of plutonium samples. In addition to the 238Pu/234U, 239Pu/235U and 240Pu/236U, the 242Pu/238U chronometer is discussed. The 242Pu/238U radiochronometer has only scarcely been used, due to its high sensitivity to residual uranium. However, it can be a very useful indicator for uranium contamination of aged plutonium samples. 相似文献
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