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X-ray Fluorescence Analysis Major Elements in Silicate Minerals

Description: An automated wavelength-dispersive x-ray fluorescence spectrometer is operational for analysis of major elements in rocks and minerals. Procedures for trace-element analysis are being developed. Sample preparation methods and analytical techniques are similar to those commonly used elsewhere, but data reduction is conducted by the Fundamental Parameters program developed by Criss. Unlike empirically derived calibration curves, this data reduction method considers x-ray absorption and secondary … more
Date: September 1, 1982
Creator: Hagan, Roland C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Uranium Hydrogeochemical and Stream Sediment Reconnaissance of the Bozeman NTMS Quadrangle, Montana

Description: "This report describes work done in the Bozeman, Montana National Topographic Map Series (NTMS) quadrangle (1:250,000 scale) by the Hydrogeochemical and stream Sediment Reconnaissance (HSSR). The HSSR...is designed to identify areas having higher than normal concentrations of uranium in ground waters, surface waters, and water-transported sediments" (p. 1). In this project, 1251 water and 1536 sediment samples were collected from 1586 locations to test for uranium levels.
Date: November 1978
Creator: Bolivar, Stephen L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Simteche Hydrate CO2 Capture Process

Description: As a result of an August 4, 2005 project review meeting held at Los Alamos National Laboratory (LANL) to assess the project's technical progress, Nexant/Simteche/LANL project team was asked to meet four targets related to the existing project efforts. The four targets were to be accomplished by the September 30, 2006. These four targets were: (1) The CO{sub 2} hydrate process needs to show, through engineering and sensitivity analysis, that it can achieve 90% CO{sub 2} capture from the treated … more
Date: September 30, 2006
Creator: Nexant
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Comparative Evaluation of DHDECMP (dihexyl-N,N-diethylcarbamoyl-methylphosphonate) and CMPO (octylphenyl-N,N,-diisobutylcarbamoylmethylphosphine oxide) as Extractants For Recovering Actinides From Nitric Acid Waste Streams

Description: Certain neutral, bifunctional organophosphorous compounds are of special value to the nuclear industry. Dihexyl-N,N-diethylcarbomoylmethylphosphonate (DHDECMP) and octylphenyl-N,N-diisobutylcarbamoylmethylphosphine oxide (CMPO) are highly selective extractants for removing actinide and lanthanide elements from nitric acid. We obtained these two extractants from newly available commercial sources and evaluated them for recovering Am(III), Pu(IV), and U(VI) from nitric acid waste streams of pluto… more
Date: February 1, 1988
Creator: Marsh, S.Fredric & Yarbro, Stephen L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Quantitative Comparison of Different Microchannel Plate Image Intensifier Tubes as Nanosecond Light Shutters in Coupled Video Systems

Description: A comparison of different manufacturers' microchannel plate image intensifier tubes (MCPTs) in coupled bideo systems is presented. Comparative performances in the areas of optical gating speed, resolution, gain, and phosphor efficiency are discussed. Relative sensitivities for various combinations of coupled MCPT/TV imager systems including P-20 and P-20R phosphors cascaded to FPS (focus projection and scan) electrostatic vidicons with silicon or Sb/sub 2/S/sub 3/ targets and CID (charge inject… more
Date: January 1, 1986
Creator: Jaramillo, Steven A. & Yates, George J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Relationship Between Pyrite Formation and Organic Sulfur Content of Coal as Revealed by Electron Microscopy

Description: There are a large number of questions concerning the mode of occurrence of organic sulfur in peat, and what, if anything, alters its occurrence during and after coalification. The formation of pyrite during periods of peatification and coalification has been hypothesized to have a great effect on the organic sulfur content of organic material surrounding the pyrite. Measurement of organic sulfur contents at different distances from pyrite particles would serve as direct experimental proof for o… more
Date: January 1, 1982
Creator: Raymond, Robert Jr. & Hagan, Roland C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The Direct Application of Geothermal Energy to Provide Process Heat in Guatemala

Description: One part of an energy and resource development program in Central America is a geothermal process heat project in Guatemala. The feasibility of the direct heat application depends upon the production characteristics and reliability of the geothermal source. Other factors are the distance from the heat source, quantity of use, and capacity factor of the use facilities. Favorable conditions would be distances of under 5 km, heat requirements approximately equal to the well capacity, and high capa… more
Date: September 1, 1987
Creator: Altseimer, John H. & Edeskuty, Frederick J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Characterization of New Focus Projection and Scan (FPS) Vidicons for Scientific Imaging Applications

Description: Several new photoconductors now commercially available as targets in Type 7803 Focus Projection and Scan (FPS) electrostatically focused vidicons have been characterized for use as radiometric sensors in transient illumination and single frame applications. These include Saticon (Se + As + Te), Newvicon (ZnSe), Pasecon (CdSe), and Plumbicon (PbO). Samples from several domestic and foreign manufacturers have been evaluated for photoconductive response time and responsivity at selected narrow wav… more
Date: January 1, 1987
Creator: Yates, George J. & Jaramillo, Steven A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Parameterization of Pion Production and Reaction Cross Sections at LAMPF Energies

Description: A parameterization of pion production and reaction cross sections is developed for eventual use in modeling neutrino production by protons in a beam stop. Emphasis is placed upon smooth parameterizations for proton energies up to 800 MeV, for all pion energies and angles, and for a wide range of materials. The resulting representations of the data are well-behaved and can be used for extrapolation to regions where there are no measurements. 22 refs., 16 figs., 2 tabs.
Date: May 1, 1989
Creator: Burman, R. L. & Smith, E. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Controlling Hydrogen Behavior in Light Water Reactors

Description: In the aftermath of the incident at Three Mile Island Unit 2 (TMI-2), a new and different treatment of the Light Water Reactor (LWR) risks is needed for public safety because of the specific events involving hydrogen generation, transport, and behavior following the core damage. Hydrogen behavior in closed environments such as the TMI-2 containment building is a complex phenomenon that is not fully understood. Hence, an engineering approach is presented for prevention of loss of life, equipment… more
Date: January 1, 1981
Creator: Cullingford, Hatice S. & Edeskuty, Frederick J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Utilization of the EBIS With RFQ Linacs

Description: The radio-frequency quadrupole (RFQ) is a new linear accelerator structure in which rf electric fields are used to simultaneously focus, bunch, and accelerate an ion beam. Since the RFQ can provide strong focusing and adiabatic bunching at low velocities, it can capture almost all of the ions extracted from an Electron Beam Ion Source (EBIS) at a low voltage and accelerate them to an energy of 1 to 2 MeV/nucleon in a distance of only a few meters. A successful test at the Los Alamos National La… more
Date: January 1, 1981
Creator: Hamm, Robert Wray & Wangler, Thomas Patrick
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Preliminary Description of the Ground Test Accelerator Cryogenic Cooling System

Description: The Ground Test Accelerator (GTA) under construction at the Los Alamos National Laboratory is part of the Neutral Particle Beam Program supported by the Strategic Defense Initiative Office. The GTA is a full-sized test facility to evaluate the feasibility of using a negative ion accelerator to produce a neutral particle beam (NPB). The NPB would ultimately be used outside the earth's atmosphere as a target discriminator or as a directed energy weapon. The operation of the GTA at cryogenic tempe… more
Date: January 1, 1988
Creator: Edeskuty, Frederick J. & Stewart, Walter F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The Frenkel-Kontorova Model with Nonconvex Interparticle Interactions

Description: A study is presented of the ground state and excitations of the Frenkel-Kontorova model with nonconvex interparticle interactions, emphasizing the special effects of the nonconvexity on the ground state and on the excitations. This study has been limited to nonconvexity with two competing length scales. 10 refs., 3 figs.
Date: January 1, 1987
Creator: Marianer, S.; Bishop, A. R. & Pouget, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Recent Developments Toward a H/sub 2/ Economy

Description: This paper highlights the current areas of hydrogen research and application interest on a worldwide basis. Developments discussed are mainly in the areas of hydrogen production, safety, and in fuel applications.
Date: January 1, 1982
Creator: Williamson, K. D., Jr. & Edeskuty, F. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Deformation of Microstructures Due to Low-Velocity Particulate Erosion of Ductile Metals by Spherical Particles

Description: A simple cumulative damage model has been developed for the low-velocity, normal-incidence, erosion of ductile metals by spherical particles. The model correlates the computed plastic-strain distribution for different impact velocities and materials with the experimentally measured erosion rates. This paper describes the surface and sub-surface changes which occur in Cu and Cu-6 wt % Al specimens during erosion testing. Scanning and transmission electron microscopy have been used to study these… more
Date: January 1, 1983
Creator: Follansbee, P.S.; Banerjee, D. & Williams, J.C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The X-Ray Spectra of the Last-Row Elements

Description: Abstract: X-ray energy level diagrams as given in the literature are tabulated for radium, thorium and uranium. A level scheme for protoactinium is derived from the published data. After a brief review of the use of X-ray data in studying outer electronic structure, it is pointed out that differences in the X-ray spectra should exist depending on whether the outer electrons are in f or d orbitals. The observed separation of the OI and OII levels in thorium and uranium indicated that the f lev… more
Date: October 22, 1946
Creator: Russell, H., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Ideal Gas Thermodynamic Properties of Detonation Products

Description: The ideal gas thermodynamic functions were computed at various temperatures in the temperature range from 300 degree to 6000 degree Kelvin for some of the molecular species of interest in detonation performance calculations. The molecular species are composed of the atoms chosen from among the following: Al, B, Be, C, Cl, F, H, Li, Mg, N, and O. The method of least squares was used to determine the parameters of a cubic equation which expresses the dependence of these thermodynamic functions on… more
Date: September 1959
Creator: Mader, Charles L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Microwave to millimeter-wave electrodynamic response and applications of semiconductor nanostructures: LDRD project 67025 final report.

Description: Solid-state lighting (SSL) technologies, based on semiconductor light emitting devices, have the potential to reduce worldwide electricity consumption by more than 10%, which could significantly reduce U.S. dependence on imported energy and improve energy security. The III-nitride (AlGaInN) materials system forms the foundation for white SSL and could cover a wide spectral range from the deep UV to the infrared. For this LDRD program, we have investigated the synthesis of single-crystalline III… more
Date: November 1, 2006
Creator: Shaner, Eric Arthur; Lee, Mark; Averitt, R. D. (Los Alamos National Laboratory); Highstrete, Clark; Taylor, A. J. (Los Alamos National Laboratory); Padilla, W. J. (Los Alamos National Laboratory) et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Quantifying reliability uncertainty : a proof of concept.

Description: This paper develops Classical and Bayesian methods for quantifying the uncertainty in reliability for a system of mixed series and parallel components for which both go/no-go and variables data are available. Classical methods focus on uncertainty due to sampling error. Bayesian methods can explore both sampling error and other knowledge-based uncertainties. To date, the reliability community has focused on qualitative statements about uncertainty because there was no consensus on how to quanti… more
Date: October 1, 2009
Creator: Diegert, Kathleen V.; Dvorack, Michael A.; Ringland, James T.; Mundt, Michael Joseph; Huzurbazar, Aparna (Los Alamos National Laboratory, Los Alamos, NM); Lorio, John F. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Linear Accelerator for Radioisotope Production

Description: A 200- to 500-..mu..A source of 70- to 90-MeV protons would be a valuable asset to the nuclear medicine program. A linear accelerator (linac) can achieve this performance, and it can be extended to even higher energies and currents. Variable energy and current options are available. A 70-MeV linac is described, based on recent innovations in linear accelerator technology; it would be 27.3 m long and cost approx. $6 million. By operating the radio-frequency (rf) power system at a level necessary… more
Date: February 1, 1982
Creator: Hansborough, L. D.; Hamm, R. W. & Stovall, J. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

30-kV Proton Injector for PIGMI

Description: A 30-kV proton injector designed for matching a 31-mA proton beam into the radio-frequency quadrupole (RFQ) section of the PIGMI accelerator has been constructed and tested. This injector uses a small efficient duoplasmatron ion source and a single-gap extraction system for creating a convergent ion beam, and a three-element unipotential einzel lens for focusing the ion beam into the RFQ. A description of this prototype injector is presented, along with the experimental data obtained during the… more
Date: January 1, 1981
Creator: Hamm, R. W.; Mueller, D. W. & Sturgess, R. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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