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Basic Radio Propagation Predictions for October 1946 Three Months in Advance

Monthly publication forecasting radio propagation world-wide presenting monthly average maximum usable frequencies in charts with narrative explanations. Also included are determinations of great-circle distances, bearings, location of transmission control points; calculations of maximum usable frequencies; absorption, distance range, and lowest useful high frequencies; and sample muf and owf calculations.

Date: July 1, 1946

Creator: Central Radio Propagation Laboratory (U.S.)

Partner: UNT Libraries Government Documents Department

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Metallurgical Laboratory, Physics Section, Report for the Month Ending January 31, 1945

Technical report with short reports from the (1) Physics Section I; (2) Physics Section II ; and (3) Physics Section III.

Date: February 1, 1945

Creator: Snell, A. H.; Nordheim, L. W. & Wollan, Ernest Omar

Partner: UNT Libraries Government Documents Department

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Temperatures on the Surface of a Slug Jacket

Prior to operating a chain reacting, graphite moderated, water cooled uranium pile at Hanford, the corrosive action of water on uranium was studied. It was necessary to enclose the uranium cylinders in Al jackets. Preliminary data were available which indicated Al jacket corrosion might be influenced by the water temperature. Therefore, in order to specify safe operating conditions, it was desirable to know the temperature at any position on the Al jacket of a slug in the tube. Because of the e… more

Date: November 1, 1944

Creator: Monet, M.

Partner: UNT Libraries Government Documents Department

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Extrusion of Compound Tubes of Aluminum and B4C

Various experimenters have shown (H.H. Gersman U.S. Patent 2,335,590, Nov. 30, 1943; Aluminum Co. of America, various technical papers; also CT-482) that when a billet is extruded by proper technique into a rod (or tube by a floating mandril) that flow of material is streamline and and the extruded article is essentially a space replica of the billet, with linearly distorted coordinates. Advantage is taken of this fact in the manufacture of alclad tubing in which a billet containing an inner co… more

Date: July 1, 1944

Creator: Creutz, E. C.

Partner: UNT Libraries Government Documents Department

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Representation of Slowing Down Functions in Water by Synthetic Kernels

Fermi, Anderson, and Nagle's experimental distribution of Indium resonance neutrons around a point source of fission neutrons in water has been fitted by analytic expressions which are source functions in the two-group, three-group, Fermi and Christy-Wheeler pile theory. The Christy-Wheeler function (exponential followed by a Gaussian) is the best fit; the two-group function (exponential) is slightly better than the Fermi Gaussian.

Date: June 1, 1944

Creator: Cahn, Albert, Jr.

Partner: UNT Libraries Government Documents Department

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The Contamination of Cooling Water by a P-9 Plant

The following sources of contamination in cooling water of the P-9 plant are considered: (1) Fission recoils, (2) Corrosion of metal, (3) Recoil from aluminum, (4) Induced activity in the water. It is found that for a P-9 plant of 3.5 x 10(4) KW contamination of the river at "X" should not exceed the .1 r criterion unless coating failure occurs. Tables of the amount of coating failure permissible are given as a function of holdup time.

Date: June 1, 1943

Creator: Friedman, Francis L. (Francis Lee), 1918-

Partner: UNT Libraries Government Documents Department

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Radioactivity of the Cooling Water

The most important source of radioactivity at the exit manifold of the pile will be due to O19, formed by neutron absorption of O18. A recent measurement of Fermi and Weil permits to estimate that it will be safe to stay about 80 minutes daily close to the exit manifolds without any shield. Estimates are given for the radioactivities from other sources -- both in the neighborhood and farther away from the pile.

Date: March 1, 1943

Creator: Wigner, Eugene Paul, 1902-1995

Partner: UNT Libraries Government Documents Department

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Chain Reaction of Pure Fissionable Materials in Solution

The critical mass of 94-239 and the corresponding critical dimensions of homogeneous mixtures of 94-239 with various moderating media been calculated as a function of the concentration of 94. A simple transformation makes the figures applicated to92-235. the results are in essential agreement with the preliminary estimated made independently by Oppenheimer and Serber. The problem of the stability of a chain reaction in solution and questions of protection are discussed.

Date: January 1, 1943

Creator: Christy, Robert F., 1916-2012 & Wheeler, John Archibald, 1911-2008

Partner: UNT Libraries Government Documents Department

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A Study of Thorium Peroxide Sulfate

Abstract. Thorium peroxide was precipitated from thorium nitrate solutions containing varying amounts of sulfate ion and of hydrogen ion. The washed solids were analyzed both wet and dry. Analyses were made for thorium, peroxide oxygen, sulfate, nitrate, and water contents. X-ray powder photographs of the dried samples by W.H. Zachariasen showed the presence of only two phases. When precipitated from high sulfuric acid, the solid phase was isomorphous with Th(OO)SO4.3H20. More weakly acid … more

Date: October 1, 1945

Creator: Hamaker, John W.

Partner: UNT Libraries Government Documents Department

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Preliminary Report on a Colorimetric Method for the Determination of Microgram Quantities of Thorium : Experiments in the Dissolution of O2 Metal [UO2]

Abstract. thorium can be precipitated as a salt of p-dimethylaminoazophenylarsonic acid at a pH of about 1.5. the precipitate, collected on a sintered glass filter is washed with dilute ammonium hydroxide to dissolve the dye. the amount of thorium is determined by measuring the concentration of the dye spectrophotometrically at a wavelength of 450 millimicrons. Zirconium, which interferes, can be separated and determined using the same reagent in strong hydrochloric. the behavior of thorium… more

Date: January 1, 1945

Creator: Byerly, W.; Niedrach, L.; Davin, W.; Dyas, H. & Bane, R. W.

Partner: UNT Libraries Government Documents Department

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Metallurgical Laboratory, Chemical Research - Radiation Chemistry, Report for the Period Ending January 15, 1945

Technical report with short reports covering (1) Effect of radiation on water and aqueous systems; (2) Effect of neutrons on graphite; (3) Effect of radiation on solid compounds; and (4) Scattering, stopping-power, ion-pair production, etc.

Date: February 1, 1945

Creator: Burton, Milton, 1902- & Allen, A. O. (Augustine O.)

Partner: UNT Libraries Government Documents Department

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The Chelate Process III : Preliminary Continuous-Operation Studies

Abstract: The rate of extraction of PuIV in either direction between benzene-TTA and aqueous HNO3 solutions is shown in the present study to be fast enough so that application of the chelate process to continuous operation should be feasible. This conclusion is based on two primary considerations: 1. The mechanism limiting the rate of extraction appears to be diffusion and not chemical-reaction-limiting. 2. The extraction may be controlled by adjustment of the system conditions to give almost a… more

Date: June 1, 1948

Creator: Rubin, B. (Barney), 1924- & Hicks, T. E.

Partner: UNT Libraries Government Documents Department

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Test Results on Clinton Alpha Amplifier Used with an Offner Columbia Scaler

Technical report describing development of the Clinton alpha amplifier. The circuit for the Clinton alpha amplifier which is used with an Offner scaler is shown attached to the report. It consists of a pre-amplifier mounted in a cylindrical alpha chamber, followed by a three state amplifier and a pulse height selector in a separate cabinet. Pulses are fed from the pulse height selector in the amplifier to the input tube of the Offner scaler. Through the third stage of the amplifier, this circu… more

Date: July 1, 1944

Creator: Ostdahl, H. E.

Partner: UNT Libraries Government Documents Department

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High Frequency Induction Heating

Abstract: Equations are given to calculate at least approximately the heating in solid and hollow cylinders, slabs and spheres. Short and long cylinders are treated as well as short and long solenoids. The complicated mathematics used to derive the equations given will be omitted as they may be found in the original references. Heating with a spark gap converter is covered. Equations are given which together with some experimental data should enable the reader to predict the efficiency, heatin… more

Date: February 1, 1947

Creator: Bromley, LeRoy A.

Partner: UNT Libraries Government Documents Department

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A Non-Gravimetric Method for the Determination of Uranium on Platinum Discs

From abstract: "This paper discusses a method for the determination of uranium on platinum discs which does not involve direct weighing of the deposited film. A statistical analysis of the results obtained indicates that the procedure is more consistent than that based on a gravimetric method and offers a relatively quick and convenient means for obtaining uranium assay results where an accuracy of approximately 99% is desired."

Date: November 1, 1946

Creator: Lilly, R. C.

Partner: UNT Libraries Government Documents Department

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Nuclear Reactor Project Progress Report, January 1948

This report is a progress report detailing operations and ongoing projects at the Brookhaven National Laboratory. The report describes new developments with buildings and progress regarding ongoing experiments. The report includes photographs showing progress in the construction of the reactor and other images and figures that accompany the descriptions of projects.

Date: January 1, 1948

Creator: Borst, L. B. & Fox, Marvin

Partner: UNT Libraries Government Documents Department

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Nuclear Reactor Progress Report

Technical report describing the building of safety devices and features for the Oak Ridge reactor by the Reactor Safeguard Committee of the Atomic Energy Commission. Outlines the difficulties encountered in detailed design and construction operations for the facility.

Date: October 1, 1948

Creator: Brookhaven National Laboratory

Partner: UNT Libraries Government Documents Department