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Isotopically selective RIMS of rare radionuclides by double-resonance excitation with cw lasers

Description: Double-resonance, Resonance Ionization Mass Spectroscopy (RIMS) using two single-frequency dye lasers and a CO{sub 2} laser for photoionization has been shown to be both extremely sensitive and highly selective. Measurements on the radioisotope {sup 210}Pb have demonstrated optical selectivity in excess of 10{sup 9} and detection limits of less than 1 femtogram.
Date: September 1, 1990
Creator: Bushaw, B. A. & Munley, J. T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Optical assay technology for safeguards

Description: Research conducted in the Ames Laboratory Nuclear Safeguards and Security Program during the period July 1, 1990 to September 30, 1990 is reviewed; included are reprints and preprints of papers written during this quarter. The first demonstration of isotopic selectivity in Inductively Coupled Plasma -- Laser Excited Atomic Fluorescence Spectroscopy (ICP-LEAFS) is reported and the application of ICP-LEAFS to U isotopic analysis is discussed. Current work in applying optical spectroscopy to the a… more
Date: October 1, 1990
Creator: Edelson, M. C.; Lipert, R. J.; Murray, G. M.; Schuler, R. A.; Vera, J.; Wang, Z. M. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Photometric on-line monitor for total oxidants in the ports purge cascade

Description: A proposed scheme for the continuous, on-line monitoring of the total concentration of oxidizing (fluorinating) gases in the top purge section of a gaseous diffusion cascade was evaluated using simulated process conditions in a laboratory. The scheme involves the reaction of the oxidizing gases in a sample stream with sodium chloride to produce chlorine, which is then measured with an ultraviolet photometer to yield a value for total oxidant concentration. This report describes the experimental… more
Date: December 1, 1990
Creator: Maddox, W. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Metal hydride compacts for hydrogen isotope separation

Description: A column packed with pellets of copper plated LaNi{sub 4.25}Al{sub 0.75} has been evaluated for its separation efficiency using a displacement method. Deuterium breakthrough curves were produced experimentally and compared with those calculated with a stage model. The height equivalent to a theoretical plate was attained and its dependence on temperature and gas flow rate was established. 6 refs., 4 figs.
Date: January 1, 1990
Creator: Heung, L.K.; Tran, R.S. & Stoner, K.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Calcium isotope separation by chemical exchange with polymer-bound crown compounds

Description: Chromatographic separation of calcium isotopes by chemical exchange with polymer-bound 18-crown-6 was investigated. The breakthrough technique of column chromatography was employed to determine the influence of solvent composition and ligand-tether structure on separation coefficients and heterogeneous calcium complex stability. The separation coefficient, {epsilon}, was found to be strongly dependent upon solvent composition. An {epsilon} of 0. 0025{plus minus}0.0002 (95% C.L.) for the {sup 44… more
Date: January 1, 1990
Creator: Jepson, B.E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Gas-phase chemical reactivity of CFC-114 (Chloro-fluoro-carbons-114) and potential replacements

Description: The DOE gaseous diffusion plant complex makes extensive use of CFC-114 as as primary coolant. As this material is on the Montreal Protocol list of materials scheduled for production curtailment, a substitute must be found. In addition to physical cooling properties, the gaseous diffusion application imposes requirements of chemical inertness to fluorinating agents that are somewhat unique. A series of studies has therefore been undertaken to evaluate the gas-phase chemical reactivity of potenti… more
Date: August 1, 1990
Creator: Trowbridge, L.D.; Angel, E.C. & Bostick, W.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Potential for collaboration on the Superconducting Super Collider

Description: The viewgraphs on the following pages comprise a presentation to the L{sub 3}/L{asterisk} collaboration as a basis for Livermore's participation. First we give an overview of the Laboratory mission, budget, and staff. Next, some illustrative examples of laser fusion, laser isotope, and beam research/magnetic fusion are shown. Finally, we show a few cases of current research that is relevant to high energy physics.
Date: March 1, 1990
Creator: Tarter, C.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Possible design modifications of ITER fuel cycle

Description: During the ITER design phase, the conceptual design of the fuel processing cycle has been established. The fuel processing cycle is designed to be able to handle all the tritium containing streams of the ITER. These streams include plasma exhaust, blanket tritium recovery, pellet propellant, neutron beam exhaust, water coolant detritiation, waste water from the room air detritiation system. The design is very conservative, i.e., the flow rate of each stream is high and the detritiation factor r… more
Date: January 1, 1990
Creator: Sze, D.K.; Finn, P.A. (Argonne National Lab., IL (USA)); Anderson, J.; Bartlit, J. & Sherman, R. (Los Alamos National Lab., NM (USA))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Laser programs highlights, July--August 1990

Description: Laser research at LLNL is divided into five major programmatic areas: inertial confinement fusion (ICF), uranium atomic vapor laser isotope separation (U-AVLIS), special (plutonium) isotope separation (SIS), laser technology, and advanced applications. We have made important progress this past year in each of these areas. This report covers the current state of these 5 areas.
Date: January 1, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Tritium experiments on components for fusion fuel processing at the Tritium Systems Test Assembly

Description: Under a collaborative agreement between US and Japan, two tritium processing components, a palladium diffuser and a ceramic electrolysis cell have been tested with tritium for application to a Fuel Cleanup System (FCU) for plasma exhaust processing at the Los Alamos National Laboratory. The fundamental characteristics, compatibility with tritium, impurities effects with tritium, and long-term behavior of the components, were studied over a three year period. Based on these studies, an integrate… more
Date: January 1, 1990
Creator: Konishi, S.; Yoshida, H.; Naruse, Y. (Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan)); Carlson, R.V.; Binning, K.E.; Bartlit, J.R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Safeguards and Security progress report, January--December 1989

Description: From January to December 1989, the Los Alamos Safeguards and Security Research and Development (R D) program carried out the activities described in the first four parts of this report: Science and Technology Base Development, Basic Systems Design, Onsite Test and Evaluation and Facility Support, and International Safeguards. For the most part, these activities were sponsored by the Department of Energy's Office of Safeguards and Security. Part 1 covers development of the basic technology essen… more
Date: November 1, 1990
Creator: Smith, Darryl B. & Jaramillo, Genara R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Selection of a hydride former for the separation of hydrogen isotopes from inerts

Description: The properties of four hydride-forming materials have been investigated to determine their applicability for use in a process to separate hydrogen isotopes from inerts. These materials are Zr{sub 0.8}Ti{sub 0.2}Ni, Zr{sub 0.65}Ti{sub 0.35}Co, NdCo{sub 3}, and ErFe{sub 2}. The properties investigated while surveying these materials include ease of activation, isotherm characteristics, kinetics, cycling stability, and oxygen stability. The results of the survey indicate NdCo{sub 3} to be the hydr… more
Date: January 1, 1990
Creator: Fisher, I. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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