Radiological chronometry of uranium metal samples

Meyers, Lisa; Glover, S. E.; LaMont, Stephen P.; Stalcup, Apryll M.; Spitz, Henry B.

doi:10.1007/s10967-013-2880-5

Cited by 6 publications

(5 citation statements)

References 8 publications

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“…Similarly, Meyers (2013Meyers ( , 2014 explored the model ages and origins of U metal samples taken from an abandoned U processing site used for rolling U rods in the 1940s and 1950s. MC-ICP-MS was used to measure both the isotopic composition of the U and the 230 Th radiochronometric age.…”

Section: Historical and Geologic Materialsmentioning

confidence: 99%

Nuclear Forensic Science: Analysis of Nuclear Material Out of Regulatory Control

Kristo

Gaffney

Marks

et al. 2016

Annu. Rev. Earth Planet. Sci.

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Nuclear forensic science seeks to identify the origin of nuclear materials found outside regulatory control. It is increasingly recognized as an integral part of a robust nuclear security program. This review highlights areas of active, evolving research in nuclear forensics, with a focus on analytical techniques commonly employed in Earth and planetary sciences. Applications of nuclear forensics to uranium ore concentrates (UOCs) are discussed first. UOCs have become an attractive target for nuclear forensic researchers because of the richness in impurities compared to materials produced later in the fuel cycle. The development of chronometric methods for age dating nuclear materials is then discussed, with an emphasis on improvements in accuracy that have been gained from measurements of multiple radioisotopic systems. Finally, papers that report on casework are reviewed, to provide a window into current scientific practice. Ian Hutcheon, our friend, colleague, and mentor, passed away on March 26, 2015, during the writing of this review paper. Ian (PhD, Physics, University of California, Berkeley, 1974)

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Section: Historical and Geologic Materialsmentioning

confidence: 99%

Nuclear Forensic Science: Analysis of Nuclear Material Out of Regulatory Control

Kristo

Gaffney

Marks

et al. 2016

Annu. Rev. Earth Planet. Sci.

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“…Their abundance and isotope ratios in rocks, meteorites, and airborne dust are used to estimate their origin, 1 dating of mineral formation, 2 mineralization history, 3 and age determination of nuclear materials. 4,5 Their separation is required for a precise analysis, but their chemical separation is time consuming. Uranium, Th, Pb and lanthanides can be separated using ion-exchange columns as well as through solvent extraction.…”

Section: Introductionmentioning

confidence: 99%

Sequential separation of ultra-trace U, Th, Pb, and lanthanides using a simple automatic system

Miyamoto

Yasuda

Magara

2015

Analyst

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Uranium, thorium, lead, and the lanthanides were automatically and sequentially separated with a single anion-exchange column. This separation was achieved using eluents consisting of a simple and highly pure acid mixture of HCl, HNO3, acetic acid, and HF. The elements of interest were separated from the major constituents, which included alkaline metal elements, alkaline earth metal elements, and iron. This simple and automatic system is driven with pressurized nitrogen gas and controlled using a computer program. An optimized separation was accomplished under the following conditions: a 50 mm long and 2 mm diameter column, 11 μm diameter anion-exchange resin, and a 35 μL min(-1) flow rate. Using this system, 50 ng of varied elements in a 100 μL feed solution were perfectly separated within 5 h with >400 decontamination factors and >95% yield. In order to evaluate the performance of this system, a reference powdered rock sample was separated using this system. Abundances of objective elements, including 0.23 ng of lutetium, were accurately determined without corrections of chemical recovery yield or subtraction of the process blank. This separation technique saves time and effort for chemical processing, and is useful for ultra-trace quantitative and isotopic analyses of elements in small environmental samples.

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“…Therefore, achieving an adequate etching to reach the natural metal is required to obtain the most accurate radiological dating. The effects of different etching procedures to remove surface oxidation of a uranium sample were determined by Meyers et al 140 A robust etching technique produced the most reliable data whereas more mild conditions led to estimates in the radiological age that were between 15 and hundreds of years older than the known age.…”

Section: Nuclear Materialsmentioning

confidence: 99%

Atomic spectrometry update. Review of advances in the analysis of metals, chemicals and functional materials

Gibson

Carter

Fisher

et al. 2014

J. Anal. At. Spectrom.

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Radiological chronometry of uranium metal samples

Cited by 6 publications

References 8 publications

Nuclear Forensic Science: Analysis of Nuclear Material Out of Regulatory Control

Nuclear Forensic Science: Analysis of Nuclear Material Out of Regulatory Control

Sequential separation of ultra-trace U, Th, Pb, and lanthanides using a simple automatic system

Atomic spectrometry update. Review of advances in the analysis of metals, chemicals and functional materials

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