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Fast-neutron total and scattering cross sections of elemental palladium

Description: Neutron total cross sections of palladium are measured from approx. = 0.6 to 4.5 MeV with resolutions of approx. = 30 to 70 keV at intervals of less than or equal to 50 keV. Differential neutron elastic- and inelastic-scattering cross sections are measured from 1.4 to 3.85 MeV at intervals of 50 to 100 keV and at 10 to 20 scattering angles distributed between approx. = 20 and 160/sup 0/. The experimental results are compared with respective quantities given in ENDF/B-V and used to deduce an opt… more
Date: June 1, 1982
Creator: Smith, A. B.; Guenther, P. T. & Whalen, J. F.
Partner: UNT Libraries Government Documents Department
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Low cost hydrogen/novel membranes technology for hydrogen separation from synthesis gas, Phase 1. [Palladium-silver/poly(etherimide), polysulfone/poly(dimethylsiloxane)/poly(ether-esteramide)composite membranes]

Description: During this quarter, work continued on the development of high-flux palladium-silver membranes for the separation of hydrogen from carbon dioxide. Palladium-silver/poly(etherimide) composite membranes were prepared by a vacuum sputtering technique. The influence of different poly(etherimide) support membranes on the performance of palladium-silver membranes was investigated. All membranes tested showed a hydrogen/carbon dioxide selectivity lower than that of the uncoated poly(etherimide)/poly(d… more
Date: January 1, 1987
Partner: UNT Libraries Government Documents Department
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Catalyst and process development for hydrogen preparation from future fuel cell feedstocks. Quarterly progress report, January 1, 1980-March 31, 1980. [Pt/Rh, Pd, Pt, Rh, Ni/Rh, Rh/Re, Ni]

Description: Catalysts are being screened to steam reform hydrocarbons in an autothermal reformer (STR). Twenty-one samples have been screened in a 1-in.-diam (ATR) reactor using No. 2 oil as the hydrocarbon feed. A series of platinum-rhodium catalysts were evaluated to study the effect of varying compositions. A sample containing 1.7% Pt/0.3% Rh was most active but the difference among the samples was within the range of test variability. Development of a more realistic test has been started. The effect of… more
Date: April 1, 1980
Creator: Yarrington, R M; Feins, I R & Hwang, H S
Partner: UNT Libraries Government Documents Department
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Development of low cost contacts to silicon solar cells. Final report, 15 October 1978-30 April 1980

Description: A summary of work done on the development of a copper based contact system for silicon solar cells is presented. The work has proceeded in three phases: (1) Development of a copper based contact system using plated Pd-Cr-Cu. Good cells were made but cells degraded under low temperature (300/sup 0/C) heat treatments. (2) The degradation in Phase I was identified as copper migration into the cells junction region. A paper study was conducted to find a proper barrier to the copper migration proble… more
Date: January 1, 1980
Creator: Tanner, D. P. & Iles, P. A.
Partner: UNT Libraries Government Documents Department
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Kinetic and infrared study of the effect of metal crystallite size and metal-support interactions on CO hydrogenation reactions: a third-year progress report

Description: Platinum and palladium supported on four different oxide materials - SiO/sub 2/, Al/sub 2/O/sub 3/, SiO/sub 2/-Al/sub 2/O/sub 3/, and TiO/sub 2/ - have been studied in depth. Different preparative techniques were utilized to vary metal particle size and change the state of the metal. For example, Pt and Pd deposited on TiO/sub 2/ and reduced at low temperatures (175 to 200/sup 0/C) exhibit normal adsorption behavior, whereas these same catalysts reduced at a high temperature (500/sup 0/C) trans… more
Date: January 1, 1980
Creator: Vannice, M. A.
Partner: UNT Libraries Government Documents Department
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Unit Operations Section Monthly Progress Report, November 1961

Description: Openation of a 6-in.-dia foam separation column with Sr/sup 89/ tracer and dodecylbenzenesulfonate as a surfactant and foaming agent was continued. The catalytic oxidation of H/sub 2/, CO, and CH/sub 4/ was studied using a nickel- chromepalladium ribbon catalyst. A Mark I prototype fuel assembly was sheared to within 1.5-in. of the end by modifying the gas hydraulic system of the shear. The force required to shear a highly carburized Mark I fuel assembly ductile tubing. Demonstration of the mec… more
Date: May 16, 1962
Creator: Whatley, M. E.; Haas, P. A.; Horton, R. W.; Ryon, A. D.; Suddath, J. C. & Watson, C. D.
Partner: UNT Libraries Government Documents Department
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Recovery of cesium, technetium, rhodium and palladium from stored waste supernates

Description: The results of our assessment of the processing methods and costs for the recovery of cesium, techneium, rhodium, and palladium from aged waste supernates are presented. Guidelines for the assessment of costs are given. Cesium can be readily absorbed from alkaline waste supernates without prior treatment using Linde AW-500, a synthetic zolite. Technetium, present in the supernate as the pertechnetate anion, together with rhodium and palladium, probably present as anionic nitrite complexes, can … more
Date: June 22, 1966
Partner: UNT Libraries Government Documents Department
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Dislocation-hydrogen correlation in metals

Description: We present a method using SANS experiments to measure correlation between dislocations and absorbed hydrogen in metals. The technique involves sequential measurements first on a metal with dislocation networks, then two further measurements on the same sample infused with deuterium and normal hydrogen. SANS experiments on metals with dislocations networks have been performed a number of times and some results have appeared in the literature. We have computer estimates of the contribution of abs… more
Date: November 1, 1987
Creator: Summerfield, G.C.; King, J.S.; Heuser, B.; Epperson, J.E. (Michigan Univ., Ann Arbor, MI (USA). Dept. of Nuclear Engineering & Argonne National Lab., IL (USA))
Partner: UNT Libraries Government Documents Department
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HOMOGENEOUS REACTOR PROGRAM PROGRESS REPORT FOR PERIOD FROM DECEMBER 1, 1960 TO MAY 31, 1961

Description: Homogoenous Reactor Test. Four HRT runs were performed to study the reactor behavior with downward core flow. The upper patch was found to have fallen out, resulting in an increase in core-to-blanket mixing. The reactor will not be operated again. In the HRT processing plant, the development of a process for removing Ni and other soluble contaminants from fuel solutions by peroxide precipitation was continued, and efficiency tests of stackfllter iodine traps were performed. Power-trace data and… more
Date: September 1, 1961
Partner: UNT Libraries Government Documents Department
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Studies of heavy-ion reactions and transuranic nuclei

Description: The development of the cold-fusion'' episode is reviewed. Ongoing studies of compound-nucleus formation and decay via the neutron multiplicity distribution confirm the validity of conventional statistical theory. The excitation energy partition in near-barrier damped {sup 58}Ni + {sup 208}Pb collisions is found to be largely independent of the direction of net mass transfer, supporting a diffusion-like nucleon-exchange mechanism. Exclusive experiments on the heavy reaction systems {sup 197}Au +… more
Date: August 1, 1991
Creator: Schroeder, W. U. & Huizenga, J. R.
Partner: UNT Libraries Government Documents Department
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Studies in Semiconducting Metal Oxides in Conjunction With Silicon for Solid State Gas Sensors. Progress Report for April 1, 1977--March 31, 1978

Description: ZnO films have been reproducibly grown using chemical deposition and radio-frequency sputtering techniques. These films are polycrystalline or amorphous, but are stable, uniform and lend themselves to material characterization by Auger and x-ray analysis techniques, and electrical measurements. SnO/sub 2/ films have been reproducibly grown by chemical vapor deposition, vacuum deposition and radio-frequency sputtering techniques. These films are also polycrystalline or amorphous, and lend themse… more
Date: April 1, 1978
Creator: Jordan, A. G.
Partner: UNT Libraries Government Documents Department
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Preliminary investigation of a technique to separate fission noble metals from fission product mixtures

Description: A variation of the gold-ore fire assay technique was examined as a method for recovering Pd, Rh and Ru from fission products. The mixture of fission product oxides is combined with glass-forming chemicals, a metal oxide such as PbO (scavenging agent), and a reducing agent such as charcoal. When this mixture is melted, a metal button is formed which extracts the noble metals. The remainder cools to form a glass for nuclear waste storage. Recovery depended only on reduction of the scavenger oxide… more
Date: August 1, 1982
Creator: Mellinger, G. B. & Jensen, G. A.
Partner: UNT Libraries Government Documents Department
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Probe molecule studies: Active species in alcohol synthesis

Description: The goal of this research is to develop a better understanding of the mechanisms of formation of alcohols and other oxygenates from syngas over supported catalysts. Different probe molecules are planned to add in situ during the reaction to help delineate reaction path ways and identify reaction intermediate species. The key of our study is to investigate how the species generated by these probe molecules interact with surface species present during oxygenate formation. CO hydrogenation reactio… more
Date: July 1, 1991
Creator: Blackmond, D.G. & Wender, I.
Partner: UNT Libraries Government Documents Department
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Corrosion of some pure metals in basaltic lava and simulated magmatic gas at 1150/sup 0/C

Description: The work summarized was designed to provide an understanding of the reaction mechanisms and modes of degradation of various metals so that the best generic types of alloys can be selected for structural components and instrumentation. Fifteen pure metals were studied. These included base metals such as iron, nickel, and cobalt; some precious metals: platinum, rhodium and palladium (possible thermocouple or lead wire materials); refractory metals: tungsten, molybdenum, tantalum, niobium, vanadiu… more
Date: December 1, 1979
Creator: Douglass, D. L. & Healey, J. T.
Partner: UNT Libraries Government Documents Department
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Development of low cost contacts to silicon solar cells. Third quarterly report, 15 October 1979-15 January 1980

Description: The results of the second phase of the program of developing low cost contacts to silicon solar cells using copper are reported. Phase I yielded the development of a plated Pd-Cr-Cu contact system. This process produced cells with shunting problems when they were heated to 400/sup 0/C for 5 minutes. Phase II was to find means of stopping the later identified copper diffusion which caused the shunting. A contact heat treatment study has been conducted with Pd-Ag, Cr-Ag, Pd-Cu, Cu-Cr and Cr-Ni-Cu… more
Date: January 1, 1980
Creator: Tanner, D. P. & Iles, P. A.
Partner: UNT Libraries Government Documents Department
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Development of a demonstration reactor using thoria as a Fischer-Tropsch catalyst

Description: We have demonstrated experimentally that thorium oxide may be used as a catalyst with CO + H/sub 2/ mixtures to produce either methanol or a mixture of hydrocarbons from C/sub 1/ to C/sub 5/ (saturated and unsaturated). The immunity of ThO/sub 2/ to poisoning by sulfur compounds makes its use very attractive for industrial applications. We are proposing to optimize the experimental conditions of the catalytic process using a one-inch reactor and to scope and define the experimental conditions f… more
Date: December 1, 1981
Creator: Colmenares, C.A. & McLean, W.
Partner: UNT Libraries Government Documents Department
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Tritium processing using metal hydrides

Description: E.I. duPont de Nemours and Company is commissioned by the US Department of Energy to operate the Savannah River Plant and Laboratory. The primary purpose of the plant is to produce radioactive materials for national defense. In keeping with current technology, new processes for the production of tritium are being developed. Three main objectives of this new technology are to ease the processing of, ease the storage of, and to reduce the operating costs of the tritium production facility. Resear… more
Date: May 1, 1986
Creator: Mallett, M.W.
Partner: UNT Libraries Government Documents Department
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Study of mechanisms of hydrogen diffusion in separation devices. Third annual report, 1979-1980

Description: The main results are in the following three areas: (1) examination of a diffusion model for PdH system, (2) connection between the diffusion model and other physical models, (3) related problems. Advances made during the third year of this project, particularly in understanding the physical model for hydrogen diffusion, make it possible to begin to meet some of the long-range objectives described in the initial proposals of 1977-1978.
Date: April 5, 1980
Creator: Lee, M.H.
Partner: UNT Libraries Government Documents Department
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Inductively coupled plasma-atomic emission spectrometry (ICP-AES) in support of nuclear waste management. [HHDECMP (hexyl hexyl-N,N diethylcarbamolymethylphosphonate) and n-octyl(phenyl)-N,N diisobutylcarbamoylmethylphosphine oxide]

Description: Simulated complex nuclear waste solutions are characterized by Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AEC). The system uses and ICP source focused on both a polychromator and a computer-controlled scanning monochromator for intensity measurements. This instrumentation allows for simultaneous and sequential measurements of liquid extraction distribution coefficients needed in the development of process flow sheets for component separations. A large number of elements are de… more
Date: January 1, 1984
Creator: Huff, E.A. & Horwitz, E.P.
Partner: UNT Libraries Government Documents Department
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Fission product Pd-SiC interaction in irradiated coated particle fuels

Description: Silicon carbide is the main barrier to fission product release from coated particle fuels. Consequently, degradation of the SiC must be minimized. Electron microprobe analysis has identified that palladium causes corrosion of the SiC in irradiated coated particles. Further ceramographic and electron microprobe examinations on irradiated particles with kernels ranging in composition from UO/sub 2/ to UC/sub 2/, including PuO/sub 2 -x/ and mixed (Th, Pu) oxides, and in enrichment from 0.7 to 93.0… more
Date: April 1, 1980
Creator: Tiegs, T. N.
Partner: UNT Libraries Government Documents Department
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Development of low cost contacts to silicon solar cells. Second quarterly report, July 15, 1979-October 15, 1979

Description: The present results of the second phase of the contract in developing low cost contacts to silicon solar cells using copper are reported. In Phase I, copper diffusion from the newly developed plated Pd-Cr-Cu contact system with heating of 400/sup 0/C was shown to cause shunting problems in active solar cells. Phase II started with a literature search on reported details of copper diffusion through different metals. Nickel was shown to be the best easily plated candidate metal to serve as a barr… more
Date: January 1, 1979
Creator: Tanner, D. P. & Iles, P. A.
Partner: UNT Libraries Government Documents Department
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Some considerations of cold fusion including the calculation of fusion rates in molecules of hydrogen isotopes

Description: We calculate the fusion reaction rates in molecules of hydrogen isotopes. The rates are calculated analytically (for the first time) as an asymptotic expansion in the ratio of the electron mass to the reduced mass of the nucleii. The fusion rates of the P-D, D-D, and D-T reactions are given for a variable electron mass by a simple analytic formula. However, we do not know any mechanism by which a sufficiently localized electron in solid can have an effective mass' large enough to explain the re… more
Date: November 1, 1989
Creator: Cowley, S.C. & Kulsrud, R.M.
Partner: UNT Libraries Government Documents Department
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