ToF-SIMS study of polycrystalline uranium after exposure to deuterium

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Time-of-flight secondary ion mass spectrometry (ToF-SIMS) is employed to examine specific features observed on a polycrystalline depleted uranium sample after exposure to high purity D{sub 2} gas. The ToF-SIMS investigation, being the first of its kind on uranium, investigates a site where the deuterated form of uranium hydride (UD{sub 3}) is clearly observed to have broken through the thin, air-formed oxide. Density functional theory calculations have been performed, which confirm the stability of, and also assign structural geometries to, the various uranium containing fragments observed with SIMS. An inclusion site was also investigated using ToF-SIMS, and these data suggest that ... continued below

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PDF-file: 28 pages; size: 3.2 Mbytes

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Morrall, P; Price, D; Nelson, A; Siekhaus, W; Nelson, E; Wu, K J et al. January 19, 2006.

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Time-of-flight secondary ion mass spectrometry (ToF-SIMS) is employed to examine specific features observed on a polycrystalline depleted uranium sample after exposure to high purity D{sub 2} gas. The ToF-SIMS investigation, being the first of its kind on uranium, investigates a site where the deuterated form of uranium hydride (UD{sub 3}) is clearly observed to have broken through the thin, air-formed oxide. Density functional theory calculations have been performed, which confirm the stability of, and also assign structural geometries to, the various uranium containing fragments observed with SIMS. An inclusion site was also investigated using ToF-SIMS, and these data suggest that the edges of such inclusions exhibit increased D ion, and hence H ion, diffusion when compared to the surrounding surface oxide. These results offer support to the previously published hypotheses that inclusion sites on uranium surfaces exhibit an increased probability to form hydride sites under H{sub 2} exposure.

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PDF-file: 28 pages; size: 3.2 Mbytes

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  • Journal Name: Philosophical Magazine, vol. 87, no. 8, August 1, 2007, pp. 541-547; Journal Volume: 87; Journal Issue: 8

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  • Report No.: UCRL-JRNL-218359
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 920856
  • Archival Resource Key: ark:/67531/metadc894908

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • January 19, 2006

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  • Sept. 27, 2016, 1:39 a.m.

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  • Dec. 7, 2016, 11:13 p.m.

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Morrall, P; Price, D; Nelson, A; Siekhaus, W; Nelson, E; Wu, K J et al. ToF-SIMS study of polycrystalline uranium after exposure to deuterium, article, January 19, 2006; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc894908/: accessed April 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.