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General computational spectroscopic framework applied to Z-pinch dynamic hohlraum K-shell argon spectra

Description: We describe a general computational spectroscopic framework for interpreting observed spectra. The framework compares synthetic spectra with measured spectra, then optimizes the agreement using the Dakota toolkit to minimize a merit function that incorporates established spectroscopic techniques. We generate synthetic spectra using the self-consistent nonlocal thermodynamic equilibrium atomic kinetics and radiative transfer code Cretin, relativistic atomic structure and cross section data from … more
Date: January 10, 2005
Creator: Adams, M L; Sinars, D B & Scott, H A
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Migration and Entrapment of DNAPLs in Heterogeneous Systems: Impact of Waste and Porous Medium Composition

Description: Dense nonaqueous phase liquids (DNAPLs) pose a significant threat to soil and groundwater at Department of Energy (DOE) sites. Evidence suggests that subsurface wettability variations are present at many of these sites as a result of spatical and temporal variations in aqueous phase chemistry, contaminant aging, mineralogy and organic matter. The presence of such heterogeneity may significantly influence DNAPL migration and entrapment in the saturated zone.
Date: January 10, 2005
Creator: Abriola, Linda M. & Demond, Avery H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Microscopic failure behavior of nanoporous Gold

Description: Nanoporous metals have recently attracted considerable interest fueled by potential sensor and actuator applications. One of the key issues in this context is the synthesis of high yield strength materials. Nanoporous Au (np-Au) has been suggested as a candidate due to its monolithic character. The material can be synthesized by dealloying Ag-Au alloys, and exhibits an open sponge-like morphology of interconnecting Au ligaments with a typical pore size distribution on the nanometer length scale… more
Date: January 10, 2005
Creator: Biener, J.; Hodge, A. & Hamza, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Influence Of Coal Combustion Flue Gas Desulfurization Waste On Element Uptake By Maize (Zea Mays L.)

Description: A greenhouse study was conducted to determine the effect of coal combustion flue gas desulfurization (FGD) waste from a coal combustion electric power facility on element uptake by maize (Zea mays L.). Unweathered FGD was applied to an Orangeburg Series (Typic Paleudult) soil with an initial soil pH salt of 4.90. The FGD was added at 0, 1, 2, 4, 6, 8, and 10 per cent by weight. The test plant, maize, was harvested after 6 weeks of growth. Within 56 days of the FGD application, all rates of FGD … more
Date: January 10, 2005
Creator: Knox, Anna S.; Knox, John D.; Adriano, Domy C. & Sajwan, Kenneth S.
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
open access

Thermal Analysis of the SAFKEG Package for Long Term Storage

Description: Interim plutonium storage for up to 10 years in the K-reactor building is currently being planned at Savannah River Site (SRS). SAFKEG package could be used to store Pu metal and oxide (PuO2) in the K-reactor complex with other packagings like 9975. The SAFKEG is designed for carrying Type-B materials across the DOE complex and meets the 10CFR71 requirements. Thermal analyses were performed to ensure that the temperatures of the SAFKEG components will not exceed their temperature limits under t… more
Date: January 10, 2005
Creator: NARENDRA, GUPTA
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Covariance matrices for nuclear cross sections derived from nuclear model calculations.

Description: The growing need for covariance information to accompany the evaluated cross section data libraries utilized in contemporary nuclear applications is spurring the development of new methods to provide this information. Many of the current general purpose libraries of evaluated nuclear data used in applications are derived either almost entirely from nuclear model calculations or from nuclear model calculations benchmarked by available experimental data. Consequently, a consistent method for gene… more
Date: January 10, 2005
Creator: Smith, D. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Transverse-momentum dependent modification of dynamic texture in central Au+Au collisions at sqrt(sNN) = 200 GeV

Description: Correlations in the hadron distributions produced in relativistic Au+Au collisions are studied in the discrete wavelet expansion method. The analysis is performed in the space of pseudorapidity (|{eta}| {le} 1) and azimuth (full 2{pi}) in bins of transverse momentum (p{sub t}) from 0.14 {le} p{sub t} {le} 2.1 GeV/c. In peripheral Au+Au collisions a correlation structure ascribed to minijet fragmentation is observed. It evolves with collision centrality and p{sub t} in a way not seen before whic… more
Date: January 10, 2005
Creator: Adams, J.; Aggarwal, M. M.; Ahammed, Z.; Amonett, J.; Anderson, B. D.; Arkhipkin, D. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Electron-Density Scaling of Conversion Efficiency of Laser Energy into L-shell X-rays

Description: Laser-produced plasmas at subcritical densities have proven to be efficient sources for x-ray production. In this context, they obtain new results from experiments performed in Kr and Xe gas-filled targets that were irradiated by the high-power OMEGA (Laboratory for Laser Energetics, University of Rochester) laser. Nearly 40% of the laser energy was converted into x-rays in the L-shell-photon-energy range ({ge} 1.6 keV) by a Kr-filled target. The conversion efficiency measurements were correlat… more
Date: January 10, 2005
Creator: Fournier, K. B.; Constantin, C.; Back, C. A.; Suter, L.; Chung, H.; Miller, M. C. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Testing of the OBO Bettermann Peak Current Sensor System for Lawrence Livermore National Laboratory

Description: During summer 2004 we studied the reliability of the OBO Bettermann peak current sensor (PCS) monitoring system - (1) credit card-type cards with magnetic strips and (2) a card reader. Three methods were used to generate current for testing the PCS system: (1) a Keytek current generator (2) a capacitor discharge, and (3) rocket triggered lightning. The data obtained from the cards were compared with oscilloscope measurements of the generated currents. Additionally, we tested for nearby natural … more
Date: January 10, 2005
Creator: Schoene, J; Uman, M A; Aurele, M; Rambo, K J; Jerauld, J E & Schnetzer, G
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Metal-Containing Organic and Carbon Aerogels for Hydrogen Storage

Description: This document and the accompanying manuscript summarize the technical accomplishments of our one-year LDRD-ER effort. Hydrogen storage and hydrogen fuel cells are important components of the 2003 Hydrogen Fuel Initiative focused on the reduction of America's dependence on oil. To compete with oil as an energy source, however, one must be able to transport and utilize hydrogen at or above the target set by DOE (6 wt.% H{sub 2}) for the transportation sector. Other than liquid hydrogen, current t… more
Date: January 10, 2005
Creator: Satcher, J. H. Jr.; Baumann, T. F. & Herberg, J. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

build - A Directory Savvy Replacement for Make

Description: All but the most trivial software packages are generally constructed from multiple source files with many steps being required to generate lexer and parser source files, compile the numerous source files, assemble libraries from object files, and link object files and libraries to form the binary executable application. During the development process, the construction process may be repeated many times as source code is modified requiring the application to be rebuilt. To address this problem t… more
Date: January 10, 2005
Creator: Reus, J F
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Characteristics of a Saturated 18.9 nm Tabletop Laser Operating at 5 Hz Repetition Rate

Description: We report the characteristics of a saturated high repetition rate Ni-like Mo laser at 18.9 nm. This table-top soft x-ray laser was pumped at 5 Hz repetition rate by 8 ps, 1 J optical laser pulses impinging at grazing incidence into a pre-created Mo plasma. The variation of the laser output intensity as a function of the grazing incidence angle of the main pump beam is reported. The maximum laser intensity was observed for an angle of 20 degrees, at which we measured a small signal gain of 65 cm… more
Date: January 10, 2005
Creator: Larotonda, M. A.; Luther, B. M.; Wang, Y.; Liu, Y.; Alessi, D.; Berrill, M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Feed Variability and Bulk Vitrification Glass Performance Assessment

Description: The supplemental treatment (ST) bulk vitrification process will obtain its feed, consisting of low-activity waste (LAW), from more than one source. One purpose of this letter report is to describe the compositional variability of the feed to ST. The other is to support the M-62-08 decision by providing a preliminary assessment of the effectiveness of bulk vitrification (BV), the process that has been selected to perform supplemental treatment, in handling the ST feed envelope. Roughly nine-tent… more
Date: January 10, 2005
Creator: Mahoney, Lenna A. & Vienna, John D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Prediction of Coal ash leaching behavior in acid mine water, comparison of laboratory and field studies

Description: Strongly alkaline fluidized bed combustion ash is commonly used to control acid mine drainage in West Virginia coal mines. Objectives include acid neutralization and immobilization of the primary AMD pollutants: iron, aluminum and manganese. The process has been successful in controlling AMD though doubts remain regarding mobilization of other toxic elements present in the ash. In addition, AMD contains many toxic elements in low concentrations. And, each mine produces AMD of widely varying qua… more
Date: January 10, 2005
Creator: ANNA, KNOX
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Plant Formate Dehydrogenase

Description: The research in this study identified formate dehydrogenase, an enzyme that plays a metabolic role on the periphery of one-carbon metabolism, has an unusual localization in Arabidopsis thaliana and that the enzyme has an unusual kinetic plasticity. These properties make it possible that this enzyme could be engineered to attempt to engineer plants with an improved photosynthetic efficiency. We have produced transgenic Arabidopsis and tobacco plants with increased expression of the formate dehyd… more
Date: January 10, 2005
Creator: Markwell, John
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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