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open access

Subduction Controls of Hf and Nd Isotopes in Lavas of the Aleutian Island Arc

Description: The Hf and Nd isotopic compositions of 71 Quaternary lavas collected from locations along the full length of the Aleutian island arc are used to constrain the sources of Aleutian magmas and to provide insight into the geochemical behavior of Nd and Hf and related elements in the Aleutian subduction-magmatic system. Isotopic compositions of Aleutian lavas fall approximately at the center of, and form a trend parallel to, the terrestrial Hf-Nd isotopic array with {var_epsilon}{sub Hf} of +12.0 to… more
Date: August 29, 2010
Creator: Yogodzinski, Gene; Vervoort, Jeffery; Brown, Shaun Tyler & Gerseny, Megan
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Kinetics of small particle activation in supersaturated vapors

Description: We examine the nucleated (with barrier) activation of perfectly wetting (zero contact angle) particles ranging from bulk size down to one nanometer. Thermodynamic properties of the particles, coated with liquid layers of varying thickness and surrounded by vapor, are analyzed. Nano-size particles are predicted to activate at relative humidity below the Kelvin curve on crossing a nucleation barrier, located at a critical liquid layer thickness such that the total particle size (core + liquid lay… more
Date: August 29, 2010
Creator: McGraw, R. & Wang, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Hybrid-K-edge/X-ray Fluorescense Densitometry with Laser-Compton Scattered X-rays

Description: The quantitative verification of the accountancy of fissile nuclear materials through independent measurements represents one of the key elements of nuclear materials Safeguards. Elemental probes of materials of interest to non-proliferation are critical to research strategy in order to identify sensitive advanced instrumentation detection technologies. Advanced instrumentation for material detection and accountability are needed for use in fuel cycle facilities for real-time in-process monitor… more
Date: August 29, 2010
Creator: Fassi, Dr. Khalid Chouffani El
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Microwave Processing of Simulated Advanced Nuclear Fuel Pellets

Description: Throughout the three-year project funded by the Department of Energy (DOE) and lead by Virginia Tech (VT), project tasks were modified by consensus to fit the changing needs of the DOE with respect to developing new inert matrix fuel processing techniques. The focus throughout the project was on the use of microwave energy to sinter fully stabilized zirconia pellets using microwave energy and to evaluate the effectiveness of techniques that were developed. Additionally, the research team was to… more
Date: August 29, 2010
Creator: Clark, D. E. & Folz, D. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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