2007 Nuclear Data Review (open access)

2007 Nuclear Data Review

The results of a review and evaluation of neutron and non-neutron nuclear data published in the scientific literature are presented. The status of new chemical elements is examined. Data on revised values for the isotopic composition of the elements are reviewed and recommended values are presented. Half-lives of very long-lived nuclides are presented, including double beta decay, double electron capture, long-lived alpha decay and long-lived beta decay. Data from new measurements on the very heavy elements (trans-meitnerium elements) are discussed and tabulated. The first observation of the radioactive decay mode of the free neutron is discussed. New measurements that have expanded the neutron drip line for magnesium and aluminum are discussed. Data on recent neutron cross-section and resonance integral measurements are also discussed.
Date: May 5, 2008
Creator: Holden, N. E.
Object Type: Article
System: The UNT Digital Library
Adjustable Shock Test Sled for Haversine Pulses at 250 fps (open access)

Adjustable Shock Test Sled for Haversine Pulses at 250 fps

New test requirements were developed by Sandia National Laboratory to simulate a regime of shock testing not previously performed at the Kansas City Plant operated by Honeywell Federal Manufacturing & Technologies. These environments were unique in that they involved amplitude of shock >1000g with relatively long pulse durations (greater 5 ms but less than 10 ms) and involved velocity changes up to 235 ft/sec. Ten months were available to develop, design, manufacture and prove-in this new capability. We designed a new shock sled to deliver this new family of shock environments in a laboratory test. The performance range of the new sled includes five specific shocks (1000 g – 8 ms, 1300 - 6 ms, 1500 g – 5.4 ms, 1950 g – 6 ms, 2250 g – 5.4 ms; all haversine shaped), and it also incorporates adjustability to accommodate new shocks within this range. These shock environments result in velocity changes ranging from 160 fps to 250 fps. The test sled accommodates test articles weighing up to 20 lbs and measuring up to 10” along any axis.
Date: May 5, 2008
Creator: Hartwig, Troy; Hower, Brent & Seaholm, Aaron
Object Type: Article
System: The UNT Digital Library
Beta-cell Assembly for the Quad Gas Sampling Detector (open access)

Beta-cell Assembly for the Quad Gas Sampling Detector

The beta-cells used in the beta-gamma detector have taken time to develop and to standardize the assembly of them. In making the assembly routine it is important to have step by step assembly instructions as well as a list of potential problems and their solutions. This document attempts to accomplish these goals.
Date: May 5, 2008
Creator: Cooper, Matthew W.; Bowyer, Ted W.; McIntyre, Justin I.; Hayes, James C.; Heimbigner, Tom R.; Ripplinger, Michael D. et al.
Object Type: Report
System: The UNT Digital Library
Biomass Biorefinery for the production of Polymers and Fuels (open access)

Biomass Biorefinery for the production of Polymers and Fuels

The conversion of biomass crops to fuel is receiving considerable attention as a means to reduce our dependence on foreign oil imports and to meet future energy needs. Besides their use for fuel, biomass crops are an attractive vehicle for producing value added products such as biopolymers. Metabolix, Inc. of Cambridge proposes to develop methods for producing biodegradable polymers polyhydroxyalkanoates (PHAs) in green tissue plants as well as utilizating residual plant biomass after polymer extraction for fuel generation to offset the energy required for polymer extraction. The primary plant target is switchgrass, and backup targets are alfalfa and tobacco. The combined polymer and fuel production from the transgenic biomass crops establishes a biorefinery that has the potential to reduce the nation’s dependence on foreign oil imports for both the feedstocks and energy needed for plastic production. Concerns about the widespread use of transgenic crops and the grower’s ability to prevent the contamination of the surrounding environment with foreign genes will be addressed by incorporating and expanding on some of the latest plant biotechnology developed by the project partners of this proposal. This proposal also addresses extraction of PHAs from biomass, modification of PHAs so that they have suitable properties for …
Date: May 5, 2008
Creator: Peoples, Dr. Oliver P.
Object Type: Report
System: The UNT Digital Library
Bisphenol A (BPA) in Plastics and Possible Human Health Effects (open access)

Bisphenol A (BPA) in Plastics and Possible Human Health Effects

This report discusses about Bisphenol A (BPA) in Plastics and Possible Human Health Effects.
Date: May 5, 2008
Creator: Schierow, Linda-Jo & Lister, Sarah A.
Object Type: Report
System: The UNT Digital Library
Calibration and Characterization of Single Photon Counting Cameras for Short-Pulse Laser Experiments (open access)

Calibration and Characterization of Single Photon Counting Cameras for Short-Pulse Laser Experiments

The photon counting efficiency of various CCD based cameras was studied as a function of x-ray energy and exposure. A pair of Spectral Instruments Model 800 CCD cameras fitted with 16 {micro}m thick back-illuminated CCDs were calibrated at low x-ray energy using two well established histogram methods, a standard pixel for pixel histogram and the single pixel event histogram method. In addition, two new thick substrate CCDs were evaluated for use at high energy. One was a commercially available Princeton Instruments LCX1300 deep depletion CCD camera while the other was a custom designed 650 {micro}m thick partially depleted CCD fitted to a SI 800 camera body. It is shown that at high x-ray energy, only a pixel-summing algorithm was able to derive spectral data due to the spreading of x-ray events over many pixels in the thicker substrate CCDs. This paper will describe the different algorithms used to extract spectra and the absolute detection efficiencies using these algorithms. These detectors will be very useful to detect high-energy x-ray photons from high-intensity short pulse laser interactions.
Date: May 5, 2008
Creator: Maddox, B. R.; Park, H.; Remington, B. A. & McKernan, M.
Object Type: Article
System: The UNT Digital Library
Characterization of Dosimetry of the BMRR Horizontal Thimble Tubes and Broad Beam Facility. (open access)

Characterization of Dosimetry of the BMRR Horizontal Thimble Tubes and Broad Beam Facility.

The Brookhaven Medical Research Reactor was a 5 mega-watt, light-water cooled and heavy-graphite moderated research facility. It has two shutter-equipped treatment rooms, three horizontally extended thimble tubes, and an ex-core broad beam facility. The three experimental thimbles, or activation ports, external to the reactor tank were designed for several uses, including the investigations on diagnostic and therapeutic methods using radioactive isotopes of very short half-life, the analysis of radiation exposure on tissue-equivalent materials using a collimated neutron beam, and the evaluation of dose effects on biological cells to improve medical treatment. At the broad beam facility where the distribution of thermal neutrons was essential uniform, a wide variety of mammalian whole-body exposures were studied using animals such as burros or mice. Also studied at the broad beam were whole-body phantom experiments, involving the use of a neutron or photon beam streaming through a screen to obtain the flux spectrum suitable for dose analysis on the sugar-urea-water mixture, a tissue-equivalent material. Calculations of the flux and the dose at beam ports based on Monte Carlo particle-transport code were performed, and measurements conducted at the same tally locations were made using bare or cadmium-covered gold foils. Analytical results, which show good agreement …
Date: May 5, 2008
Creator: Hu, J. P.; Reciniello, R. N. & Holden, N. E.
Object Type: Article
System: The UNT Digital Library
China's Sovereign Wealth Fund (open access)

China's Sovereign Wealth Fund

This report discusses China's ruling executive body, the State Council, which establishes the China Investment Corporation (CIC), a sovereign wealth fund, in September 2007 to invest $200 billion of China's then $1.4 trillion in foreign exchange reserves. Congress and financial analysts raised concerns about the CIC after its creation, partly because it was a comparatively large sovereign wealth fund, partly because it was government-owned, and partly because it reported directly to the State Council.
Date: May 5, 2008
Creator: Martin, Michael F.
Object Type: Report
System: The UNT Digital Library
Climate Change: The Role of the U.S. Agriculture Sector (open access)

Climate Change: The Role of the U.S. Agriculture Sector

This report is organized in three parts. First, it discusses the extent of GHG emissions associated with the U.S. agriculture sector, and cites current and potential estimates for U.S. agricultural soils to sequester carbon and partly offset national GHG emissions. Second, the report describes the types of land management and farm conservation practices that can reduce GHG emissions and/or sequester carbon in agricultural soils, highlighting those practices that are currently promoted under existing voluntary federal agricultural programs. The Appendix provides a summary primer of the key background information presented in these first two sections. Finally, the report describes ongoing legislative action within both the climate change and farm bill debates, and discusses the types of questions that may be raised regarding the role of the U.S. agriculture sector in the broader climate change debate.
Date: May 5, 2008
Creator: Johnson, Renée
Object Type: Report
System: The UNT Digital Library
Congressional Record: Its Production, Distribution, and Accessibility (open access)

Congressional Record: Its Production, Distribution, and Accessibility

This report provides information about the Production, Distribution, and Accessibility of Congressional Record. The Congressional Record is the most widely published account of the debates and activities in congress.
Date: May 5, 2008
Creator: Amer, Mildred
Object Type: Report
System: The UNT Digital Library
Crack growth rates and metallographic examinations of Alloy 600 and Alloy 82/182 from field components and laboratory materials tested in PWR environments. (open access)

Crack growth rates and metallographic examinations of Alloy 600 and Alloy 82/182 from field components and laboratory materials tested in PWR environments.

In light water reactors, components made of nickel-base alloys are susceptible to environmentally assisted cracking. This report summarizes the crack growth rate results and related metallography for field and laboratory-procured Alloy 600 and its weld alloys tested in pressurized water reactor (PWR) environments. The report also presents crack growth rate (CGR) results for a shielded-metal-arc weld of Alloy 182 in a simulated PWR environment as a function of temperature between 290 C and 350 C. These data were used to determine the activation energy for crack growth in Alloy 182 welds. The tests were performed by measuring the changes in the stress corrosion CGR as the temperatures were varied during the test. The difference in electrochemical potential between the specimen and the Ni/NiO line was maintained constant at each temperature by adjusting the hydrogen overpressure on the water supply tank. The CGR data as a function of temperature yielded activation energies of 252 kJ/mol for a double-J weld and 189 kJ/mol for a deep-groove weld. These values are in good agreement with the data reported in the literature. The data reported here and those in the literature suggest that the average activation energy for Alloy 182 welds is on the …
Date: May 5, 2008
Creator: Alexandreanu, B.; Chopra, O. K. & Shack, W. J.
Object Type: Report
System: The UNT Digital Library
Defense: FY2009 Authorization and Appropriations (open access)

Defense: FY2009 Authorization and Appropriations

None
Date: May 5, 2008
Creator: Towell, Pat & Daggett, Stephen
Object Type: Report
System: The UNT Digital Library
Demonstration of Successful X-ray Thomson Scattering Using Picosecond K-(alpha) X-ray Sources for the Characterization of Dense Heated Matter (open access)

Demonstration of Successful X-ray Thomson Scattering Using Picosecond K-(alpha) X-ray Sources for the Characterization of Dense Heated Matter

We discuss the first successful K-{alpha} x-ray Thomson scattering experiment from solid density plasmas for use as a diagnostic in determining the temperature, density, and ionization state of warm dense matter with picosecond resolution. The development of this source as a diagnostic and stringent requirements for successful K-{alpha} x-ray Thomson scattering are addressed. Data for the experimental techniques described in this paper [1] suggest the capability of single shot characterization of warm dense matter and the ability to use this scattering source at future Free Electron Lasers (FEL) where comparable scattering signal levels are predicted.
Date: May 5, 2008
Creator: Kritcher, A.; Neumayer, P.; Lee, H. J.; Doeppner, T.; Falcone, R.; Glenzer, S. et al.
Object Type: Article
System: The UNT Digital Library
Drilling, Sampling, and Well-Installation Plan for the IFC Well Field, 300 Area (open access)

Drilling, Sampling, and Well-Installation Plan for the IFC Well Field, 300 Area

The 300 Area was selected as a location for an IFC because it offers excellent opportunities for field research on the influence of mass-transfer processes on uranium in the vadose zone and groundwater. The 300 Area was the location of nuclear fuel fabrication facilities and has more than 100 waste sites. Two of these waste sites, the North and South Process Ponds received large volumes of process waste from 1943 to 1975 and are thought to represent a significant source of the groundwater uranium plume in the 300 Area. Geophysical surveys and other characterization efforts have led to selection of the South Process Pond for the IFC.
Date: May 5, 2008
Creator: Bjornstad, Bruce N. & Horner, Jacob A.
Object Type: Report
System: The UNT Digital Library
Electrochromically switched, gas-reservoir metal hydride devices with application to energy-efficient windows (open access)

Electrochromically switched, gas-reservoir metal hydride devices with application to energy-efficient windows

Proof-of-principle gas-reservoir MnNiMg electrochromic mirror devices have been investigated. In contrast to conventional electrochromic approaches, hydrogen is stored (at low concentration) in the gas volume between glass panes of the insulated glass units (IGUs). The elimination of a solid state ion storage layer simplifies the layer stack, enhances overall transmission, and reduces cost. The cyclic switching properties were demonstrated and system durability improved with the incorporation a thin Zr barrier layer between the MnNiMg layer and the Pd catalyst. Addition of 9 percent silver to the palladium catalyst further improved system durability. About 100 full cycles have been demonstrated before devices slow considerably. Degradation of device performance appears to be related to Pd catalyst mobility, rather than delamination or metal layer oxidation issues originally presumed likely to present significant challenges.
Date: May 5, 2008
Creator: Anders, Andre; Slack, Jonathan L. & Richardson, Thomas J.
Object Type: Article
System: The UNT Digital Library
The Emergency Alert System (EAS) and All-Hazard Warnings (open access)

The Emergency Alert System (EAS) and All-Hazard Warnings

This report provides an overview of the Emergency Alert System (EAS) and all hazard warnings. EAS is one of several federally managed warning systems which administers with FEMA and FCC.
Date: May 5, 2008
Creator: Moore, Linda K.
Object Type: Report
System: The UNT Digital Library
Final Technical Report for “A Heliportable Sonic Drilling Platform for Microhole Drilling and Exploration” (open access)

Final Technical Report for “A Heliportable Sonic Drilling Platform for Microhole Drilling and Exploration”

The Phase I objectives were fully achieved the execution of a program that included the: • Development of a comprehensive model of the sonic drill technology and interaction of the dynamic drilling parameters with the impedance of the earth. • Operation and measurement of the sonic drilling process in the field at full scale. • Comparison of the analytical and experimental results to form an objective and quantified approach to describe the fundamental phenomena and to develop a methodology for automated control of the sonic drilling process. • Conceptual design of a modular sonic drilling system that can be transported to remote sites by helicopter. As a result, the feasibility of a commercially viable sonic drilling technology that can produce microholes up to 1,500 feet in depth, and that is field deployable to remote, environmentally sensitive sites via a helicopter, has been demonstrated.
Date: May 5, 2008
Creator: Lucon, Peter
Object Type: Report
System: The UNT Digital Library
Further Dosimetry Studies at Rhode Island Nuclear Science Center. (open access)

Further Dosimetry Studies at Rhode Island Nuclear Science Center.

The RINSC is a 2 mega-watt, light water and graphite moderated and cooled reactor that has a graphite thermal column built as a user facility for sample irradiation. Over the past decade, after the reactor conversion from a highly-enriched uranium core to a low-enriched one, flux and dose measurements and calculations had been performed in the thermal column to update the ex-core parameters and to predict the effect from in-core fuel burn-up and rearrangement. The most recent data from measurements and calculations that have been made at the RINSC thermal column since October of 2005 are reported.
Date: May 5, 2008
Creator: Reciniello, R. N.; Holden, N. E.; Hu, J. P.; Johnson, D. G.; Meddleton, M. & Tehan, T. N.
Object Type: Article
System: The UNT Digital Library
Item Veto and Expanded Impoundment Proposals: Legislative History and Current Status (open access)

Item Veto and Expanded Impoundment Proposals: Legislative History and Current Status

This report provides an overview of the history and current status of the item veto and expanded impoundment proposals.
Date: May 5, 2008
Creator: McMurtry, Virginia A.
Object Type: Report
System: The UNT Digital Library
The NATO Summit at Bucharest, 2008 (open access)

The NATO Summit at Bucharest, 2008

NATO held a summit in Bucharest, Romania, April 2-4, 2008. The summit did not become the occasion to adopt major new ideas or initiatives. A "Strategic Vision" paper on Afghanistan clarified several issues but did not lead to a greater sharing of the combat burden among NATO governments. Croatia and Albania, but not Macedonia, were invited to begin accession negotiations for membership. In a contentious debate, neither Georgia nor Ukraine were admitted to the MAP process. The debate over missile defense led to the consolidation of an evolving allied position. See also CRS Report RL34415, Enlargement Issues at NATO's Bucharest Summit, coordinated by Paul Gallis.
Date: May 5, 2008
Creator: Gallis, Paul
Object Type: Report
System: The UNT Digital Library
The Pattern of Interest Rates: Does it Signal an Impending Recession? (open access)

The Pattern of Interest Rates: Does it Signal an Impending Recession?

The cyclical behavior of the economy is of great interest to Congress, yet the onset of an economic downturn is seldom recognized promptly. Policymakers frequently search for reliable recession predictors. The behavior of interest rates may provide advanced warning of an impending downturn. The easing of monetary policy in evidence since September 2007 is consistent with efforts to forestall or minimize an economic downturn. Economic growth has been low since the last quarter of 2007, and some forecasters are now predicting a recession in 2008.
Date: May 5, 2008
Creator: Labonte, Marc & Makinen, Gail
Object Type: Report
System: The UNT Digital Library
Performance of a Buried Radioactive High Level Waste Glass After 24 Years (open access)

Performance of a Buried Radioactive High Level Waste Glass After 24 Years

A radioactive high level waste glass was made in 1980 with Savannah River Site (SRS) Tank 15 waste. This glass was buried in the SRS burial ground for 24 years but lysimeter data was only available for the first 8 years. The glass was exhumed and analyzed in 2004. The glass was predicted to be very durable and laboratory tests confirmed the durability response. The laboratory results indicated that the glass was very durable as did analysis of the lysimeter data. Scanning electron microscopy of the glass burial surface showed no significant glass alteration consistent with the results of the laboratory and field tests. No detectable Pu, Am, Cm, Np, or Ru leached from the glass into the surrounding sediment. Leaching of {beta}/{delta} from {sup 90}Sr and {sup 137}Cs in the glass was diffusion controlled. Less than 0.5% of the Cs and Sr in the glass leached into the surrounding sediment, with >99% of the leached radionuclides remaining within 8 centimeters of the glass pellet.
Date: May 5, 2008
Creator: Jantzen, Carol M.; Kaplan, Daniel J.; Bibler, Ned E.; Peeler, David K. & Plodinec, M. J.
Object Type: Article
System: The UNT Digital Library
Proposals to Merge the Forest Service and the Bureau of Land Management: Issues and Approaches (open access)

Proposals to Merge the Forest Service and the Bureau of Land Management: Issues and Approaches

None
Date: May 5, 2008
Creator: unknown
Object Type: Report
System: The UNT Digital Library
RECENT BEAM MEASUREMENTS AND NEW INSTRUMENTATION AT THE ADVANCED LIGHT SOURCE (open access)

RECENT BEAM MEASUREMENTS AND NEW INSTRUMENTATION AT THE ADVANCED LIGHT SOURCE

The Advanced Light Source (ALS) in Berkeley was the first of the soft x-ray third generation light source ever built, and since 1993 has been in continuous and successful operation serving a large community of users in the VUV and soft x-ray community. During these years the storage ring underwent through several important upgrades that allowed maintaining the performance of this veteran facility at the forefront. The ALS beam diagnostics and instrumentation have followed a similar path of innovation and upgrade and nowadays include most of the modem and last generation devices and technologies that are commercially available and used in the recently constructed third generation light sources. In this paper we will not focus on such already widely known systems, but we will concentrate our effort in the description of some measurements techniques, instrumentation and diagnostic systems specifically developed at the ALS and used during the last few years.
Date: May 5, 2008
Creator: Sannibale, Fernando; Baptiste, Kenneth; Barry, Walter; Chin, Michael; Filippetto, Daniele; Jaegerhofer, Lukas et al.
Object Type: Article
System: The UNT Digital Library