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The Decontamination and Recovery of Precious Metals

Description: "This report is the third quarterly report under Contract AT(30-1)-2528 for the decontamination and recovery of precious metals from contaminated scrap. The results described in [2nd quarterly report] and expanded in this report confirm the statement that the method achieves not only the desired decontamination but also produces a product of high purity. In addition the relative simplicity of the method makes it particularly adaptable to large scale manipulation."
Date: 1961
Creator: Nuclear Materials and Equipment Corporation
Partner: UNT Libraries Government Documents Department
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Utilization of Radiactive Isotpoes in Coal Process Research

Description: "This is the fourth Quarterly Report on Task II dealing with Methods Development for Radio-Tracing of Coal Product Hydrocarbons With Tritium. The problem of radio-chemical purity of traces is resolved by developing a new method of labeling with tritium that generates essentially no highly tagged side products or impurities."
Date: May 1, 1961
Creator: Yavorsky, P. M. & Gorin, E.
Partner: UNT Libraries Government Documents Department
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Utilization of Radiactive Isotpoes in Coal Process Research

Description: "This is the third quarterly report on Task II dealing with Methods Development for Radio-Tracing of Coal Product Hydrocarbons With Tritium. The problem of accurate low-level tritium assay for tagged hydrocarbons has been resolved and attention is now primarily directed at the questions of tritium mobility and radio-chemical purity in tagged tracers."
Date: February 15, 1961
Creator: Yavorsky, P. M. & Gorin, E.
Partner: UNT Libraries Government Documents Department
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A Study of the Mechanism of Radiation Induced Gelation in Monomer-Polymer Mixtures

Description: "The degree of equilibrium swelling of low density polyethylene by various di- and tri-functional monomers has been experimentally determined. Non-extractable portions of irradiated monomer-polymer and monomer-free-polymer samples have been determined by refluxing in a Soxhlet extractor. Irradiated, monomer-free polyethylene samples that give a non-extractable portion after Soxhlet, refluxing dissolve by direct immersion in the same hot solvent.
Date: 1961
Creator: Radiation Applications Incorporated
Partner: UNT Libraries Government Documents Department
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A Study of the Mechanism of Radiation Induced Gelation in Monomer-Polymer Mixtures

Description: "Polyvinyl chloride degrades quite badly under irradiation due to the ease of splitting out HC1. The incorporation of polyfunctional monomers, however, has been found to lower the radiation doses required for gelation below those which result in degradation. Thus, gelation of polyfunctional monomer-polyvinyl chloride mixtures has been achieved quite readily."
Date: 1961
Creator: Radiation Applications Incorporated
Partner: UNT Libraries Government Documents Department
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A Manual of Experiments in Reactor Physics

Description: Nuclear processes are random in character, and, accordingly, are amenable to statistical treatment. In 1905, shortly after the discover of natural radioactivity, E. Von Schweldler showed that the analytical description of the decay distribution of radioactive substances followed from probability considerations regardless of the mechanism involved in the process of atomic disintegration.
Date: August 1961
Creator: Valente, Frank Anthony; Davidson, J. P. (John Pirnie), 1924-; Gisser, David G.; de Moraes, Octavio L.; Bryce, Donald H. & LoGuidice, Joseph M.
Partner: UNT Libraries Government Documents Department
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Coolball, a Machine Code for Thermal Analysis of Pebble Bed Reactor Cores

Description: COOLBALL is an IBM 650 machine program designed to calculate local gas and ball temperatures, gas flow, and pressure loses as induced by non-uniform power generation and voidage within an axial flow Pebble Bed Reactor core. This code has been used extensively to study the thermal characteristics of Pebble Bed Reactor cores in support of a broad program for the development of the PBR concept.
Date: [1961]
Partner: UNT Libraries Government Documents Department
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Fuel Element Development Program for the Pebble Bed Reactor

Description: Previous results from the Pebble Bed Reactor Fuel Element Development Program had shown the excellent promise of vapor-deposited Al2O3 doq5intw on UO2 particles as a low permeability high temperature fission product barrier. However, since the matrix material for the PBR fuel element is a graphite sphere, carbonaceous coatings on the dispersed fuel particles might be of more interest because of improved particle coating-matrix compatibility and no displacement of neutron moderating materials. Since a pyrolytic carbon coating also appeared to be low permeability higt temperature material, emphasis was placed on the development of pyrolytic carbon coated UC2 particles dispersed in a graphite sphere as the reference PBR fuel element.
Date: 1961
Creator: Sanderson & Porter, Inc.
Partner: UNT Libraries Government Documents Department
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Diffusion of Krypton Through Uranium Carbide - Final Report

Description: This program was established to develop new information concerning the mechanism of diffusion of fission gases (krypton and xenon) through UO2 and UC. The work was to concentrated on measurements of diffusion rates in unirradiated materials in the temperature range of 1000°C to above 2000°C, these determinations being important to the projected use of refractory fuel materials in high-temperature, high-burnup reactors.
Date: January 10, 1961
Creator: Weinstock, J. J.; Pinkerton, A. P. & Ziegel, K. D.
Partner: UNT Libraries Government Documents Department
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The Study of the Potential Applications of Radioisotope Technology to Water Resource Investigations and Utilization

Description: The study which has been carried out under Contract AT(30-1)2477 has as its objective the review of all work which has been done on the application of radionuclear techniques to research in water resources and supply, the evaluation of this work, and the suggestions of specific experiments which must be performed if these applications are to be extended.
Date: January 31, 1961
Creator: Feely, Herbert W., 1928-
Partner: UNT Libraries Government Documents Department
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A Systematic Study of (p,xp) Reactions in the 100-400 MEV Region

Description: (p,xp) reactions are those nuclear reactions induced by high energy protons in which both the mans and the charge of the target nucleus are reduced by x-1 units. The most common type of these reactions to be expected in the 100 to 400 Mev region involves the exclusive emission of protons as a results of the interactions. The specific (p,xp) reactions investigated in this study were those where 2 is less than or equal to x where x is less than or equal to 5.
Date: June 2, 1961
Creator: Morrison, David Lee
Partner: UNT Libraries Government Documents Department
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Radioactivity Dissemination Near Uranium Processing Mills

Description: This report follows a preliminary survey made to study radioactive contamination of the soil (and to some extent in the air and waters) in the vicinity of seven uranium processing mills.
Date: April 1, 1961
Creator: Feldman, M. H.; Troianello, Emilio J.; Coates, G. K. & Sheehan, W. R.
Partner: UNT Libraries Government Documents Department
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Status of Uranium Exploration in Turkey

Description: Field evaluations made of uranium deposits located in and near southwestern Turkey
Date: October 1961
Creator: Kratchman, Jack
Partner: UNT Libraries Government Documents Department
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The Equation of State of Solids at Low Temperature

Description: Technical report describing and evaluating the the three experimental methods for obtaining equation of state data at low temperatures; (1) approximate measurement of the PVT relationship by a piston-displacement technique, (2) the measurement of a heat capacity at constant volume as a function of molar volume and temperature, and (3) direct measurement of the pressure variation of the elastic constants using ultrasonic techniques. X-ray methods also might be applicable.
Date: October 13, 1961
Creator: Bernardes, N. (Newton), 1931- & Swenson, C. A.
Partner: UNT Libraries Government Documents Department
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Chlorotriammineplatinum(II) Ion : Acid Hydrolysis and Isotopic Exchange of Chloride Ligand

Description: Abstract: The acid hydrolysis of [Pt(NH3)3Cl] has been shown to occur to a measurable extent. for this reaction: [APt(NH3)cCl]+ + H2O [chemical equilibrium symbol with rate constant k-1 above and k1 below] [Pt(NH3)c(H2O)]++ + Cl-, the equilibrium quotient was measured at 25 degree C and 35 degree C. At 25 degree C this quotient was 8.4 x 10-5 at [Mu] (ionic strength) = 0 and 25 x 10-5 at [mu] = .318 M. This variation is consistent with the expected changes in activity coefficients. [Delta]H for the reaction was found to be approximately 0. The rate constant, k1 was 2.3 x 10-5 sec.-1 at 25 degree C and it was nearly independent of ionic strength. The acid hydrolysis provides a mechanism for the exchange of the chloride ligand and Cl-. Exchange experiments with Cl36 showed that in addition to the acid hydrolysis, a process, first order in both, [Pt(NH3)3Cl] and Cl- with a rate constant of 6. 10-5 sec.-1M.-1 contributes to the exchange. The behavior of the entire series of chloro-ammines of platinum(II) toward acid hydrolysis and chloride exchange has been summarized, and a likely mechanism for the process has been discussed.
Date: May 15, 1961
Creator: Aprile, Ferruccio. & Martin, Don S., Jr.
Partner: UNT Libraries Government Documents Department
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Ternary Compounds Between Thorium Monocarbide and Thorium Dihydride

Description: From abstract: "The thorium-hydrogen-carbon system was studied by measuring hydrogen equilibrium pressures at various compositions and temperatures. Two compounds, ThC·ThH2 and ThC·2ThH2, were found and characterized. ThC·ThH2 has a hexagonal closest-packed lattice with ao=3.816Å and co=6.302Å. ThC·2ThH2 has a monoclinic lattice with ao=6.50Å, bo=3.80Å, co=10.91Å and β = 119°. The enthalpies of formation for each compound were determined."
Date: 1961
Creator: Peterson, D. T. & Rexer, J.
Partner: UNT Libraries Government Documents Department
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Small Order Shape Factor in Na22

Description: From abstract: "The beta spectrum of Na22 has been examined using an intermediate-image beta-ray spectrometer operating at 2 1/2% transmission and 2.4% resolution. Five separate determinations of the maximum energy and of the slope of the form-factor plot were made. One determination was made using a charge-discriminating baffle inserted in the spectrometer. The unweighted mean of the five values for the maximum energy is 547.4 ± 1.0 kev. The unweighted mean of the five values for the form-factor slope is 0.023 ± 0.006 1/mc2."
Date: 1961
Creator: Nichols, R. T.; McAdams, R. E. & Jensen, E. N.
Partner: UNT Libraries Government Documents Department
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Structures of the Intermediate Phases Ni10Zr7 and Ni10Hf7

Description: This report discusses the experiments undertaken to determine the crystal structures of the intermediate phases Ni10Zr7 and Ni10Hf7. The report looks at structural determinations, a comparison observed and calculated structure factors for the refined zirconium-rich structure, the refined structural parameters for the stoichiometric Ni10Zr7 phase, a comparison of observed and calculated structure factors for the refined stoichiometric Ni10Zr7 structure, a comparison of observed intensity data and calculated structure factors for the stoichimetric Ni10Hf7 phase, and a comparison of interatomic distances in the zirconium-rich and stoichiometric Ni10Zr7 structures.
Date: 1961
Creator: Kirkpatrick, M. E.; Smith, J. F. & Larsen, W. L.
Partner: UNT Libraries Government Documents Department
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Chapter 48: Analytical Chemistry of Cobalt

Description: This report provides a detailed discussion of the analytical chemistry of cobalt, including an introduction, the properties of cobalt, the sampling of cobalt-bearing materials, the separation and isolation of cobalt, the detection and identification of cobalt, the determination of cobalt, and the specific methods for determining cobalt.
Date: 1961
Creator: Dale, John M. & Banks, Charles V.
Partner: UNT Libraries Government Documents Department
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Point Imperfections in Metals: Existance and Detection

Description: From introductory paragraph: "The factors which control the properties, and hence the utility, of an alloy are microscopic in nature. These factors are controlled by controlling the composition and past history of the material. control of the composition of the alloy determines for the most part the number and types of phases which will be present, while control of the past history of the alloy determines the grain size and degree of crystalline perfection within the grains. Since the electrical, mechanical, and many of the physical properties of a metal are highly sensitive to the degree of crystalline perfection, it is worthwhile to explore the nature and role of crystalline imperfections."
Date: 1961
Creator: Smith, J. F.
Partner: UNT Libraries Government Documents Department
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Internal Conversion Coefficients of the 2+-0+, E2 Transitions in Even-Even Sm152[over]90 and Gd152[over]88

Description: From abstract: "To investigate the deviation of the internal conversion coefficients of E2 transitions from theoretical computations and their dependence on nuclear deformation, the total internal conversion coefficient of the 121.8-kev 2+-0+ transition in ellipsoidal Sm152[over]90 was measured to be 1.135 ± 0.010 with a high accuracy coincidence-sum method. The K-shell to total internal conversion ratio was determined to be 0.588 ± 0.003 with a [beta] spectrometer...The experiment revealed no deviation from theory nor indications of strong dependence on nuclear deformation; it therefore did not confirm recent beliefs in this regard. The details of the coincidence-sum method were described. The K electron to total electron capture ratio, from Eu152 to the 1.53 Mev state in Sm152 was also measured to be 0.79±0.02."
Date: July 17, 1961
Creator: Lu, D. C. & Schupp, G.
Partner: UNT Libraries Government Documents Department
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gem-Bis(disubstitutedphosphinyl)alkanes. II. Extraction Properties of Bis(di-n-hexlphosphinyl)methane

Description: From abstract: "Bis(di-n-hexylphosphinyl)methane, HDPM, [(C6H13)2P(O)]2CH2, has been studied as an extractant for a variety of metals. HDPM was evaluated as an extractant for uranium(VI) and compared with tri-n-octylphosphine oxide, TOPO, (C8H13)3PO. In nonpolar solvents, HDPM forms a polymeric-like substance with compounds of uranium(VI). Viscosity measurements indicate that the molecular weight of this polymeric-like substance is about 100 times greater than the corresponding complex with TOPO. Polymer formation occurs only when nonpolar solvents are used as diluents for HDPM and is easily avoided by using polar solvents such as 1,2-aichlorobenzene. HDPM forms 1:1 and 2:1 complexes with uranium(VI) nitrate. Equilibrium constants for these complexes as well as that for the 2:1 TOPO complex were calculated and it was shown that the over-all constant is at least ten times larger for the HDPM complex than for the TOPO complex. The effect of concentration of various mineral acids, extractant concentration, temperature, and diluents on the extraction of uranium are discussed."
Date: April 11, 1961
Creator: Burke, Keith E.; Sakurai, Hiroshi; O'Laughlin, Jerome W. & Banks, Charles V.
Partner: UNT Libraries Government Documents Department
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