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In-situ characterization of common impurities in uranium metal by spark spectrochemistry

Description: A rapid spectrochemical method, involving the application of a condensed spark to finished or semifinished uranium metal surfaces, was developed to analyze large numbers of parts (50 or more in a single day) for up to nine specification impurity elements. No sampling or preparation is required, and the on-site analysis is carried out by transporting the spectrograph and source to the production area. The procedure is used for process control and is supplemental to the more refined pyro carrier … more
Date: March 29, 1974
Creator: King, H.G.
Partner: UNT Libraries Government Documents Department
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The Electron Emission Characteristics of Aluminum, Molybdenum and Carbon Nanotubes Studied by Field Emission and Photoemission.

Description: The electron emission characteristics of aluminum, molybdenum and carbon nanotubes were studied. The experiments were setup to study the emission behavior as a function of temperature and exposure to oxygen. Changes in the surface work function as a result of thermal annealing were monitored with low energy ultra-violet photoelectron spectroscopy for flat samples while field emission energy distributions were used on tip samples. The change in the field emission from fabricated single tips expo… more
Date: December 2002
Creator: Sosa, Edward Delarosa
Partner: UNT Libraries
open access

Air Emission Inventory for the Idaho National Engineering and Environmental Laboratory - Calendar Year 1999 Emission Report

Description: This report presents the 1999 calendar year update of the Air Emission Inventory for the Idaho National Engineering and Environmental Laboratory (INEEL). The INEEL Air Emission Inventory documents sources and emissions of nonradionuclide pollutants from operations at the INEEL. The report describes the emission inventory process and all of the sources at the INEEL, and provides nonradionuclide emissions estimates for stationary sources.
Date: May 30, 2000
Creator: Zohner, S.K.
Partner: UNT Libraries Government Documents Department
open access

Air Emission Inventory for the INEEL -- 1999 Emission Report

Description: This report presents the 1999 calendar year update of the Air Emission Inventory for the Idaho National Engineering and Environmental Laboratory (INEEL). The INEEL Air Emission Inventory documents sources and emissions of nonradionuclide pollutants from operations at the INEEL. The report describes the emission inventory process and all of the sources at the INEEL, and provides nonradionuclide emissions estimates for stationary sources.
Date: May 1, 2000
Creator: Zohner, Steven K
Partner: UNT Libraries Government Documents Department
open access

Emission of secondary particles from metals and insulators at impact of slow highly charged ions

Description: Emission of secondary electrons and ions from clean Au, CxHy-Au, and SiO{sub 2} surfaces at impact of slow (v{approx}0.3 v{sub Bohr}) ions were measured as function of incident ion charge for 1+{le}q{le}75+. Electron yields from thermal SiO{sub 2} films (150 mm on Si) were found to be lower than those from the other two for q>3+. Yields of negative secondary ions from SiO{sub 2} and CxHy-Au were recorded in parallel with electron emission data and exhibit a q{sub 4} dependency on incident ion c… more
Date: October 31, 1996
Creator: Schenkel, T.
Partner: UNT Libraries Government Documents Department
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Air Emission Inventory for the Idaho National Engineering and Environmental Laboratory - Calendar Year 1998 Emissions Report

Description: This report presents the 1998 calendar year update of the Air Emission Inventory for the Idaho National Engineering and Environmental Laboratory (INEEL). The INEEL Air Emission Inventory documents sources and emissions of nonradionuclide pollutants from operations at the INEEL. The report describes the emission inventory process and all of the sources at the INEEL, and provides nonradiological emissions estimates for stationary sources.
Date: October 1, 1999
Creator: Zohner, S. K.
Partner: UNT Libraries Government Documents Department
open access

Efficient multi-exciton emission from quantum dots.

Description: The fundamental spontaneous emission rate an emitter can be modified by its photonic environment. By enhancing the spontaneous emission rate, there is a possibility of extracting multi-exciton energies through radiative decay. In this report, we explore using high Q and small volume cavities to enhance the spontaneous emission rate. We observed greater than 50 folds enhancement in the spontaneous emission from photonic crystal waveguide or microcavity using close-packed monolayer of PbS quantum… more
Date: September 1, 2010
Creator: Luk, Ting Shan
Partner: UNT Libraries Government Documents Department
open access

Effect of particle size on the carrier-distillation analysis of PuO$sub 2$

Description: A study was made to determine the effect of particle size on the carrier- distillation analysis of PuO/sub 2/ and to explain how to avoid the difficulties caused by large PuO/sub 2/ particles. The relative intensity of five elements was determined for three particle sizes and it was shown that it increases as the particle size becomes smaller. Further the line intensity of the added internal standard Co also increased with decreasing particle size. Accurate spectrochemical results were obtained… more
Date: January 1, 1974
Creator: Martell, C.J.
Partner: UNT Libraries Government Documents Department
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Microscopic probabilistic model for the simulation of secondary electron emission

Description: We provide a detailed description of a model and its computational algorithm for the secondary electron emission process. The model is based on a broad phenomenological fit to data for the secondary emission yield (SEY) and the emitted-energy spectrum. We provide two sets of values for the parameters by fitting our model to two particular data sets, one for copper and the other one for stainless steel.
Date: July 29, 2002
Creator: Furman, M. A. & Pivi, M. T. F.
Partner: UNT Libraries Government Documents Department
open access

Amorphous Diamond Flat Panel Displays - Final Report of ER-LTR CRADA project with SI Diamond Technology

Description: The objective of this project was to determine why diamond-based films are unusually efficient electron emitters (field emission cathodes) at room temperature. Efficient cathodes based on diamond are being developed by SI Diamond Technology (SIDT) as components for bright, sunlight-readable, flat panel displays. When the project started, it was known that only a small fraction (<1%) of the cathode area is active in electron emission and that the emission sites themselves are sub-micron in si… more
Date: May 8, 1998
Creator: Ager, Joel W., III
Partner: UNT Libraries Government Documents Department
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Shedding New Light on Weak Emission-Line Quasars in the CIV-Hβ Parameter Space

Description: Article describes how weak emission-line quasars (WLQs) are a subset of Type 1 quasars that exhibit extremely weak Lyα+N V λ1240 and/or C IV λ1549 emission lines. The authors investigate the relationship between emission-line properties and accretion rate for a sample of 230 `ordinary' Type 1 quasars and 18 WLQs at z<0.5 and 1.5<z<3.5 that have rest-frame ultraviolet and optical spectral measurements.
Date: April 10, 2023
Creator: Ha, Trung; Dix, Cooper; Matthews, Brandon M.; Shemmer, Ohad; Brotherton, Michael S.; Myers, Adam D. et al.
Partner: UNT College of Science
open access

Quantitative Clinical Evaluation of a Simultaneous PETI MRI Breast Imaging System

Description: A prototype simultaneous PET-MRI breast scanner has been developed for conducting clinical studies with the goal of obtaining high resolution anatomical and functional information in the same scan which can lead to faster and better diagnosis, reduction of unwanted biopsies, and better patient care.
Date: April 3, 2013
Creator: Schlyer D. J. & Schlyer, D. J.
Partner: UNT Libraries Government Documents Department
open access

Kyoto Protocol Implementation

Description: This report analyze the impacts of linking JI and CDM to the future European Emission Allowance Trading System (ETSy). The result indicate that the volume of credits obtained through JI and CDM projects by the enlarged EU Emission Allowance Trading Scheme, as well as the magnitude of cost savings and allowance price impacts will crucially depend on how much competition there will be from EU Member States and other countries in JI and CDM credits.
Date: May 2003
Creator: Criqui, Patrick & Kitous, Alban
Partner: UNT Libraries
open access

Allocation and Related Issues for Post-2012 Phases of the EU ETS

Description: This report provides information on major design options related to the allocation of emissions allowances under the European Union Emissions Trading Scheme (the EU ETS, or "the Scheme"). The report was developed to assist the European Commission in the context of the review of options for the EU ETS after 2012, during the third and subsequent phases of the Scheme. The report covers topics related to allocation alternatives as well as several other issues. All of the material contained here was… more
Date: October 22, 2007
Creator: Harrison, David, Jr.; Radov, Daniel & Klevnas, Per
Partner: UNT Libraries
open access

A retrospective on the LBNL PEM project

Description: We present a retrospective on the LBNL Positron EmissionMammography (PEM) project, looking back on our design and experiences.The LBNL PEM camera utilizes detector modules that are capable ofmeasuring depth of interaction (DOI) and places them into 4 detectorbanks in a rectangular geometry. In order to build this camera, we had todevelop the DOI detector module, LSO etching, Lumirror-epoxy reflectorfor the LSO array (to achieve optimal DOI), photodiode array, custom IC,rigid-flex readout board,… more
Date: November 15, 2004
Creator: Huber, J. S.; Moses, W. W.; Wang, G. C.; Derenzo, S. E.; Huesman, R. H.; Qi, J. et al.
Partner: UNT Libraries Government Documents Department
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