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Investigation of the Suitability of Prepakt Concrete for Mass and Reinforced Concrete Structures

Description: The purpose of the investigation reported herein was to develop data on the suitability of Prepakt concrete for mass concrete dams and for reinforced concrete construction. Prepakt concrete is made by packing the forms with coarse aggregate and then pumping in a cement base intrusion mixture (grout) to fill the voids.
Date: October 1951
Creator: Waterways Experiment Station (U.S.)
Partner: UNT Libraries Government Documents Department


Description: Design and construction of remote control equipment for plutonium metal production are described. Criteria for the design of the equipment included the following: rubber gloves were to be completely eliminated; all mechanisms were to be built as integral units to facilitate replacement through use of the plastic- bag technique; no accessory equipment such as switches, valves, piping, or cylinders were to be inside the contaminated enclosure unless required to handle the plutonium; and all units were to be tested in mockups before final design. The chemical process, general layout, and operating function are outlined. Descriptions are given of all mechanical units, electrical systems, hydroxide slurry systems, ventilation systems, and chemical tanks and manifolds. (W.L.H.)
Date: October 1, 1951
Creator: Hazen, W.C.
Partner: UNT Libraries Government Documents Department

The Chelate Process, VI. Process flow involving o-dichlorobenzeneas the solvent for TTA

Description: Comparative studies of a series of halogenated solvents, as carriers for TTA in the chelate process for plutonium extraction, indicate that ortho-dichlorobenzene most nearly satisfies the requirements that are set forth. A complete process design is presented for use with this solvent, and flow data and equipment capacities are given for dissolver solution and for uranium-free fission product solution as alternate feeds to the process. Vertical mixer-settlers are recommended as the contractors, although pulsed columns or packed columns are also believed to be suitable. The size of such units is estimated from the best available rate and equilibrium data, and the effects of several operating variable are considered.
Date: January 1, 1951
Creator: Davis Jr., M.W.; Hicks, T.E. & Vermeulen, T.
Partner: UNT Libraries Government Documents Department

Medical and Health Physics Quarterly Report October, November, andDecember, 1950

Description: A considerable volume of work was accomplished during the past three months in the tracer program, experiments being conducted with At{sup 211}, carrier-free Bi{sup 206}, carrier-free Mn{sup 52}, carrier-free Mo{sup 93,99}, Np{sup 237}, Ta{sup 182} of a fair degree of specific activity, carrier-free Sc{sup 46}, and high specific activity Tm{sup 170}.
Date: February 27, 1951
Creator: Biology, Health and
Partner: UNT Libraries Government Documents Department

Carbon Dioxide Fixation by Microorganisms

Description: Resting cells of eleven microorganisms were exposed to radioactive carbon dioxide for 40 minutes. The radioactive compounds formed during this time were separated and identified by paper chromatography. Resting cells of Lactobacillus casei fixed no carbon dioxide and growing cells fixed carbon dioxide primarily in malic and aspartic acids. All of the radioactive compounds formed could have become radioactive by reversal of known decarboxylation reactions.
Date: July 24, 1951
Creator: Lynch, Victoria H. & Calvin, Melvin
Partner: UNT Libraries Government Documents Department

Carbonate Cleavage in the Hydrolysis of Diethyla-Naphthylmalonate

Description: A kinetic product study of the carbonate cleavage of malonic ester has been made, and it is shown that the formation of carbonate from malonic ester in alkaline solution involves the direct fission of the half acid ester.
Date: November 26, 1951
Creator: Fry, Arthur & Calvin, Melvin
Partner: UNT Libraries Government Documents Department

Energy Doubling in D.C. Accelerators

Description: It is generally believed that charged particles cannot be accelerated from ground potential to ground potential unless they pass through a system which has associated iwth it a time varying magnetic field. D.C. electric fields must satisfy the equation {contour_integral} Eds = 0, while the time varying fields used in radio-frequency accelerators and betatrons are freed from this restriction of scalar potential theory. In 1932, AJ Dempster produced protons with an energy of 45 Kev, by passing them from an electrode at +22.5 kv dc to ground. The protons were first accelerated to ground potential, with an energy gain of 22.5 kev. A small fraction of the protons then picked up an electron from a residual gas molecule, and ''coasted'' to a second electrode at +22.5 kv. Then a small fraction of these neutral hydrogen atoms lost their electrons, and were accelerated to ground with a second gain in energy equal to 22.5 kev. An accelerator of this type is obviously impractical for several reasons. The probability of neutralizing a proton varies inversely with a high power of the particle velocity, so the scheme would not work at energies of interest to nuclear physicists. Even at the low energies where neutralization is not negligible, the energy spread of the beam would be wide because charge exchange could take place at all points along the beam trajectory.
Date: April 20, 1951
Creator: Alvarez, Luis W.
Partner: UNT Libraries Government Documents Department

Mass Spectrometer Studies of Ion Sources for One Shot AcceleratorTube

Description: A simple mass spectrometer using 60 degree focusing was set up to study the (illegible) of the ions produced by various types of sources. A schematic diagram of the apparatus is shown in Fig. 1, which is to a large extent self-explanatory. The isolation transformer was simply a piece of RG (illegible) cable about three feet long and was used in order to operate the source at high accelerating voltage allowing the collector to be at essentially ground potential. The collimating slits were 0.05 (illegible) wide and were space 4 (illegible-cm?) apart. The coarse slit immediately preceding the collector cup was 0.3 (illegible) wide. The electrometer was the integrating type which indicated the potential due to the charge collected on known capacitance. The vacuum tube voltmeter indicated the potential of the 0.5 (illegible) capacitor due to the total charge reaching the slit system. It thus served as a monitor of the source output for each firing. The neon lamp was a protection for the condenser against breakdown discharges of the tube.
Date: December 12, 1951
Creator: Brumbaugh, R.; Pon, W.; Seaman, W. & Wiegand, C.
Partner: UNT Libraries Government Documents Department

High Energy Proton Spallation -- Fission of Uranium

Description: The fission and spallation reactions caused in uranium by bombardment with high energy protons (340 t o 350 MeV) were investigated. The reaction products were separated from the target by chemical processes and identified by their radioactive properties. The relative yields of the observed fission products were measured, and the results plotted as a function of mass number. Several of the spallation products were identified and their yields estimated. An attempt was made to determine the most probable atomic number for a nuclide of given mass formed directly from fission. Studies were made of the relative yields along several isobaric chains as a function of atomic number. From these data predictions of the mass and charge of the fissioning nucleus are made.
Date: May 28, 1951
Creator: Folger, R.L.; Stevenson, P.C. & Seaborg, G.T.
Partner: UNT Libraries Government Documents Department


Description: The directions for preparing the following acids from labeled acetic acid on a 1 to 20 millimole scale is presented: Succinic acid, malic acid, fumaric acid and tartaric acid. Two methods for preparing the succinic acid are detailed.
Date: June 12, 1951
Creator: Jorgensen, E.C.; Bassham, J.A.; Calvin, M. & Tolbert, B.M.
Partner: UNT Libraries Government Documents Department

Some Comments on the Mechanism of Fission

Description: A correlation of spontaneous fission rates with Z and A is made to show that these rates depend on the nuclear type. Some suggestions as to the mechanisms are given and it is also shown how these relate to the mechanism of slow neutron and photo fission.
Date: July 25, 1951
Creator: Seaborg, Glenn T.
Partner: UNT Libraries Government Documents Department

An Ion Exchange Study of Possible Hydridized 5f Bonding in theActinides

Description: A study has been made of the elution behavior of curium(III), americium(III), plutonium(III), actinium(III), plutonium(IV), neptunium(IV), uraniuM(IV), thorium(IV), neptunium(V), plutonium (VI), uranium (VI), lanthanum(III), cerium(III), europium(III), ytterbium(III), ytterium(III), strontium(II), barium(II), radium(II), cesium(I) with 3.2 M, 6.2 M, 9.3 M, and 12.2 M HCl solutions from Dowex-50 cation exchange resin columns. These elutions show that in high concentrations of hydrochloric acid the actinides form complex ions with chloride ion to a much greater extent than the lanthanides. The strengths of the tripositive actinide complex ions apparently go in the order plutonium > americium> curium, although their ionic radii also decrease in this same order. To explain these results, a partial covalent character may be ascribed to the bonding in the transuranium complex ions. It is shown that a reasonable structure for such covalent bonding involves hybridization of the 5f orbitals in the actinide elements.
Date: August 28, 1951
Creator: Diamond, R.M.; Street, Jr., K. & Seaborg, G.T.
Partner: UNT Libraries Government Documents Department

The Path of Carbon in Photosynthesis. XIV.

Description: It seems hardly necessary to repeat to an audience of this kind the importance of the process known as photosynthesis in the interaction and the interdependence of organisms and in the very existence of life as we know it. This process by which green plants are able to capture electromagnetic energy in the form of sunlight and transform it into stored chemical energy in the form of a wide variety of reduced (relative to carbon dioxide) carbon compounds provides the only major source of energy for the maintenance and propagation of all life.
Date: June 30, 1951
Creator: Calvin, Melvin; Bassham, J.A.; Benson, A.A.; Kawaguchi, S.; Lynch, V.H.; Stepka, W. et al.
Partner: UNT Libraries Government Documents Department

Reconnaissance of Henry Mountains Area, Wayne and Garfield Counties, Utah

Description: From introduction: A trip into the Henry Mountains area occupied the days from March 6 to 9, 1951, inclusive, excepting March 7, which was used to examine Reo Hunt's deposit in Poison Spring Wash. Observations were made on stratigraphy, regional geology, and the locations of the known deposits of uranium and vanadium.
Date: April 5, 1951
Creator: Reinhardt, E. V.
Partner: UNT Libraries Government Documents Department

Preliminary Memorandum, East Slope Area, Marysvale, Utah

Description: From introduction: Preliminary field data have been assembled as a background for laboratory investigations directed toward interpretation of alteration features in the East Slope area. Such data constitute one of several units which should improve our understanding of the pattern of uranium distribution.
Date: November 1951
Creator: Green, Jack & Kerr, Paul F.
Partner: UNT Libraries Government Documents Department

Geological Investigation of the Trachyte District, Henry Mountains, Utah

Description: Abstract: Uranium-vanadium ore has long been known in the Trachyte district. Production started in 1913 and has been erratic and intermittent to date. Until recently, practically all production from the Henry Mountains area has come from the Trachyte district.
Date: December 6, 1951
Creator: Brooke, Gerald L.; Shirley, Raymond F. & Swanson, Melvin A.
Partner: UNT Libraries Government Documents Department

Progress Report on Gamma-Ray Logging Activities

Description: Abstract: An evaluation is made of radioactivity logging as applied to exploration drilling on the Colorado Plateau. The compilation of data gives a preliminary insight into the possibilities of the technique being applied.
Date: July 9, 1951
Creator: Comstock, Sherman S.
Partner: UNT Libraries Government Documents Department

Developments in the Centrifuge Separation Project

Description: Preface: The results of the work undertaken at the University of Virginia, the research laboratory at Westinghouse, and the Standard Oil Development Co. are reported in Parts I, II, and III, respectively, of this volume.
Date: 1951
Creator: Beams, Jesse W.; Hagg, A. C. & Murphree, E. V.
Partner: UNT Libraries Government Documents Department

Zirconium Metal Fines Recovery: Interim Technical Report for May 15, 1950 to December 15, 1950

Description: This report covers the laboratory and pilot plant investigation of the reclamation of the low hafnium zirconium fines resulting from the manufacture of zirconium sponge and zirconium crystal bar. The process investigated involved recovery of the zirconium as zirconium tetrachloride, by drying the fines in an atmosphere of nitrogen and subsequent chlorination of the fines with anhydrous hydrogen chloride at temperatures above the sublimation point of the product.
Date: January 24, 1951
Creator: Ogburn, S. C., Jr. & Reader, L. J.
Partner: UNT Libraries Government Documents Department

An Inexpensive, Wide Range Gamma Ray Geiger Survey Meter

Description: From abstract: Detailed information is given on the theory, design, parts specifications and assembly data for a new radiation detector for measurement of ionizing radiations.
Date: January 4, 1951
Creator: LeVine, H. D. & DiGiovanni, H. J.
Partner: UNT Libraries Government Documents Department

Final Report to U.S. Atomic Energy Commission: Low-Temperature Heavy Water Plant

Description: From purpose of report: The primary purpose of this report and its appendices is to transmit to the AEC the principal results of the experimental and engineering work done on the low-temperature process and to describe the factors which led to the designs finally adopted.
Date: March 15, 1951
Partner: UNT Libraries Government Documents Department