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The Low Energy Photodisintegration of 3H and 3He and Neutron-Deuteron Scattering

Description: The cross sections for electric dipole photodisintegration of H/sup 3/ and He/sup 3/ at low energies are expressed in terms of the effective range parameters of the doublet n-d scattering matrix. Agreement with the experimental results is possible for either set of n-d scattering lengths.
Date: 1959
Creator: Delves, L. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Behavior of Bond Under Dynamic Loading

Description: The objectives of this research program are to determine bond strength under dynamic loading, to compare bond strengths under static and dynamic loading, and to test the adequacy of ACI Building Code bond requirements for structural elements subjected to blast loads. The tests have shown that local static bond strengths may be as high as 0.75 fc and that under dynamic loading this strength increases to fc. For all practical lengths of embedment of bars, steel failure is to be expected both unde… more
Date: September 1959
Creator: Liepins, A. A. (Artis A.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Response of Concrete Shear Keys to Dynamic Loading

Description: A program for determining the behavior of concrete shear keys under dynamic loading similar to that encountered in nuclear blasts was coupled with a study of the comparative behavior of shear keys under static loading. The testing procedure gave deflection recording for the shear keys, their strength in pure shear, under transverse compression and when dowelled, stresses and strains in the embedded dowels, and the mode of failure of each specimen. From an analysis of the data obtained and a st… more
Date: January 1959
Creator: Nawy, Edward G. & Shah, Jayantilal M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Photometric Titration of Weak Bases in Nonaqueous Media

Description: The photometric titration technique is used for the determination of weak bases using perchloric acid in acetic acid as titrant and acetic acid or acetonitrile as solvent. Differentiating titration of as many as four components in a single mixture is shown to be possible. Comparison with potentiometric titrations in the same media shows the photometric technique to be preferable in many instances where the bases to be differentiated are very similar in strength. The versatility of the photometr… more
Date: 1959
Creator: Hummelstedt, L. E. I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Anodic Precipitation of Tracer Manganese as Dioxide

Description: Quantitative recovery of carrier‐free 10−9 M manganese (II) is possible from weakly acidic solutions. The use of lead dioxide as either a non-isotopic carrier or a chemical displacing agent makes possible high recoveries from more acidic solutions.
Date: 1959
Creator: Heintz, Edward A. & Rogers, Lockhart Burgess, 1917-1992
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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High-Dielectric-Constant Materials as Capacitor Dielectrics : a Study in Dielectric Spectroscopy

Description: A fundamental study is presented comparing the electric properties for materials of "normal" dielectric constant (Al/sub 2/O/sub 3/ and MgTiO/sub 3/) with those of high dielectric constant (TiO/sub 2/, CaTiCO/sub 3/, SrTiO/sub 3/, STABa/sub 0.65Sr/sub 0.35/! STATiO/sub 3/, and BaTiO/sub 3/). Single crystals and ceramics, as far as available, were investigated from d-c to the microwave range as function of time, temperature, field strength, and prehistory. Three types of relaxation spectra were … more
Date: December 1959
Creator: Von Hippel, Arthur R. (Arthur Robert), 1898-2003 & Westphal, W. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A Preliminary Study of the Potential to Kinetic Energy Conversion Process in the Stratosphere

Description: The potential to kinetic energy conversion process in the lower stratosphere is evaluated using adiabatically derived vertical velocities for the North American region for a five-day period. Preliminary results suggest the possibility that on the average the kinetic energy of stratospheric motions may not result from a conversion of potential energy within the stratosphere. The further implication is that stratospheric motions are mechanically driven by the motions in the adjacent layers of the… more
Date: September 15, 1959
Creator: White, Robert M., 1923-2015 & Nolan, George F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A Regulated Power Supply for a High Current Magnet

Description: Current regulation of a Bitter type electromagnet powered by a 10 kw. motor-generator set has been achieved by control of the generator exciting field. An error signal, obtained by comparing the voltage drop across a series resistor in the magnet circuit with a reference voltage, is fed back with appropriate amplification to the grids of series tubes in the generator field supply. Magnetic fields from 400 gauss to 10 kilogauss in a fixed gap (1.5 in. width and 3.5 in. diameter) are obtainable w… more
Date: July 1959
Creator: Block, Richard B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Production of Single Crystal Copper Films at Low Temperatures

Description: A method is described for the production of single‐crystal films of copper at temperatures as low as −40°C. This method utilizes the epitaxy of copper on rock salt. A thin layer of copper is evaporated on a single crystal of salt at 350°C. Then a thick layer is evaporated at the low temperature. Films grown by this method have been examined using x‐ray and etching techniques. It was found that some of these films had single‐crystal regions of 1 mm diameter and larger. These crystallites had [10… more
Date: April 1959
Creator: Yelon, Arthur
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A New Method for Preparing Hydroxide-Free Alkali Chloride Melts

Description: Molten salts have been used extensively as solvents for electrochemical processes. The difficulty of removing the last traces of residual moisture from the salts has often necessitated rather arduous drying procedures. If the moisture is not removed, hydrolysis occurs upon fusion. The hydroxide ion thus produced precipitates metal ions, attacks glass, and is reduced more easily than the alkali metals, thus diminishing the usable potential range of the solvent. It was found that if rigorously dr… more
Date: 1959
Creator: Maricle, Donald L & Hume, David N
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Study of Equilibrium Between Metals and Their Polyvalent Chlorides in LiCl-KCl Eutectic Melt

Description: Dilute solutions of uranium, thorium, zirconium, and columbium chlorides in LiCl-KCl eutectic melts were made by anodic dissolution of these metals. After equilibrium was reached between the solution and the metal, the electrode potential was measured relative to a AgCl reference electrode. The nature of the metal ions in the equilibrated melt was determined either from the slope of the isothermal plots of potential versus the logarithm of concentrations, or by using Faraday's law. It was found… more
Date: 1959
Creator: Yang, Ling; Hudson, Robert G. & Chien, Chien-yeh
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Physical Metallurgy of Uncommon Metals

Description: The progress report covers the work carried out during the first year 1958-59 in the department of metallurgy at M.I.T. under the supervision of Professors John T. Norton and Robert E. Ogilvie. A brief summary of the work that has been completed and in some cases still continuing is given. The work has been listed under the following general headings: (1) Diffusion studies in the uranium-niobium system, (2) X-ray detection of cladding defects, (3) Precision X-ray stress analysis of uranium and … more
Date: October 15, 1959
Creator: Norton, John T. & Ogilvie, Robert E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Vaporization Processes in a Runaway Reactor

Description: From the point of view of constituents of a fuel element at temperatures between 2500 and 4500 degree K, the fuel elements can be considered to consist of six types of material: carbon, elements less volatile than carbon, 26 moles of rare gases, 21 moles of alkali metals, 17 moles of alkaline earth metals, and 4 moles of miscellaneous volatile elements. Various processes involving the constituents from 2000 to 45000 degree K are considered. Reactivity gain due to can rupture is discussed.
Date: August 4, 1959
Creator: Brewer, Leo, 1919-2005
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Heat Transfer Fluids for Fuel Element Cans

Description: The maximum temperature in the interior of the fuel element could be greatly reduced by incorporating a liquid between the fuel element and the outer can to increase-heat transfer rates. It is of interest to consider what liquids would be chemically compatible with graphite and the actinide carbides. Elements which melt below 1100 and boil above 1400 deg C that form no stable solid carbides, include Cu, Ga, TI, Ge, Sn, Pb, Sb, Bi, and compounds include GeP, GeS, GaP, Ga/sub 2/S, GaTe, GaAs, SnT… more
Date: August 4, 1959
Creator: Brewer, Leo, 1919-2005
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fate of Fission Product Gases in the Coolant Stream

Description: The quantity and characteristics of fission products in coolant gases due to leaking fuel elements are discussed. It is concluded that the rare gases, the alkali metals, the halides, and Sb may act as permanent gases to a considerable extent. The other fission products are expected to condense out completely on walls or as dust consisting of metals, carbides, and oxides.
Date: August 4, 1959
Creator: Brewer, Leo, 1919-2005
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Diffusion in a Temperature Gradient

Description: To summarize one finds that for diffusion in a temperature gradient by a vacancy mechanism one must have E(M) < E(F). No such restrictions occur for interstitial diffusion. The spatial vacancy distribution is very nearly the equilibrium distribution if dislocations are present. If no dislocations are present then one could obtain E(M) by measurement of the spatial distribution.
Date: June 1959
Creator: Koehler, James S. (James Stark), 1914-2006
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Melting Point of Th-U-C Fuel Elements

Description: From the point of view of predicting melting behavior of fuel elements containing fission products after 50 percent burn-up, the fuel can be considered to consist of 2000 moles Th, 150 moles U, 55 moles of rate earth metal, 31 moles of Zr, 25 moles of Mo, 20 moles of Rh-Ru-Tc, and 15 moles of alkaline earth metal. All other fission products are present in too small amounts to have any important effect upon the melting point or will have vaporized. However, the presence of alkali metal vapor sho… more
Date: August 3, 1959
Creator: Brewer, Leo, 1919-2005
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A Fast Hyperfragment Produced by a Heavy Primary Cosmic Ray

Description: The order of magnitude of the non-mesonic to mesonic ratio has been measured for several species of hyper- fragments. With this ratio as well as the branching ratio of the mesonic decays and a determination of the lifetime, it is possible to find the partial decay rates of the various modes. This decay rate should throw light on the influence of nucleons on the strangeness violation in the decay. The effect should be greater for heavy hyperfragments. The difficulty in attempts to measure lifet… more
Date: 1959
Creator: Camerini, U.; Fry, W. F.; Groves, T. & Huzita, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Study of Factors Influencing Ductility of Iron-Aluminum Alloys. Monthly Letter Report No. 8, 15 March 1959 to 15 March 1960

Description: Studies are being made on the effects of variation of aluminum content, heat treatment, surface preparation, and other metallurgical factors on the room temperature ductility of Al-- Fe alloys. It is estimated that approximately 65 percent of the proposed research has been completed over the first eight and one-half months of the contract period.
Date: December 8, 1959
Creator: Perkins, Frank C. & Nachman, J. F. (Joseph F.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Progress Report No. 54 for the Period through April 30, 1959

Description: This is the fifty-fourth progress report of the Laboratory for Nuclear Science at the Massachusetts Institute of Technology. Progress reported covers the period for Physics and Chemistry through April 30,1959. Progress is reported on: (1) Chemistry of the fission elements group, (2) Nuclear chemistry (inorganic) group, (3) Nuclear chemistry (organic) group, (4) Cosmic ray group, (5) High energy accelerator physics group, (6) Bubble chamber group, (7) Liner acceleratory group, (8) Rockefeller ge… more
Date: May 1, 1959
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Use of an Electronic High Vacuum Pump on Various Types of Mass Spectrometers

Description: A commercially available electronic high vacuum pump has bee tested on various types of mass spectrometers used at the Oak Ridge Gaseous Diffusion Plant. Considerable savings in operating and maintenance costs can be realized from the use of this pump. the greatest savings result from the elimination of the cold trap required for the diffusion pump whether it is cooled by liquid nitrogen or by mechanical refrigeration. additional savings results from the fact that the pump currently is usually … more
Date: October 9, 1959
Creator: High, R. D. & Schede, R. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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