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A. J. Nunn
Researcher at Los Alamos National Laboratory
Publications - 7
Citations - 71
A. J. Nunn is an academic researcher from Los Alamos National Laboratory. The author has contributed to research in topics: Uranium & Isotope dilution. The author has an hindex of 5, co-authored 7 publications receiving 57 citations.
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Uranium and Thorium Concentration and Isotopic Composition in Five Glass (BHVO-2G, BCR-2G, NKT-1G, T1-G, ATHO-G) and Two Powder (BHVO-2, BCR-2) Reference Materials
TL;DR: In this article, the U-Th isotopic ratios of two powdered source materials (BCR-2, BHVO-2) were also characterised using multi-collector thermal ionisation mass spectrometry and multicollector inductively coupled plasma-mass spectrometers.
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Uranium-series chronology and cosmogenic 10Be–36Cl record of Antarctic ice
TL;DR: In this article, the authors presented new uranium-series and cosmogenic nuclide age data obtained by sensitive thermal ionization and accelerator mass spectrometric techniques for samples of dusty polar ice from Allan Hills, Antarctica.
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A record of uranium-series transport at Nopal I, Sierra Peña Blanca, Mexico: Implications for natural uranium deposits and radioactive waste repositories
Joanna S. Denton,Steven J. Goldstein,P. Paviet,A. J. Nunn,Ronald S. Amato,Kimberly A. Hinrichs +5 more
TL;DR: The Nopal I uranium ore deposit is located at Pena Blanca in the Chihuahua region of northern Mexico and fracture-fill materials from surface fractures as well as fractures in a vertical drill core have been analyzed.
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Evaluation of new geological reference materials for uranium-series measurements: Chinese Geological Standard Glasses (CGSG) and macusanite obsidian.
Joanna S. Denton,Michael T. Murrell,Steven J. Goldstein,A. J. Nunn,Ronald S. Amato,Kimberly A. Hinrichs +5 more
TL;DR: Multicollector thermal ionization mass spectrometry (MC-TIMS and MC-ICP-MS) uranium and thorium concentration and isotopic data obtained by isotope dilution for a suite of newly available Chinese Geological Standard Glasses designed for microanalysis are presented.
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Sequential chemical separations and multiple ion counting ICP-MS for 241Pu–241Am–237Np dating of environmental collections on a single aliquot
Steven J. Goldstein,Kimberly A. Hinrichs,A. J. Nunn,Daniel W. Gurganus,Ronald S. Amato,Warren J. Oldham +5 more
TL;DR: In this paper, a combined sequential chemical separation procedure and multiple ion counting ICP-MS measurement method for isotopic measurements of Am in environmental samples was developed, in conjunction with established resin bead TIMS measurements for Pu and Np.