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Radium-Barium Separation Process: Part 2 - Chromate Fractionation Procedures
Abstract: A comprehensive study was made of various fractionation systems for the fractional separation of barium-radium mixtures. The most efficient and simplest fractionation scheme was chosen on the basis of the thermodynamics of separating the constituents of mixed crystals and of the combining fractions in a system of repeating composition. This scheme was applied to the separation of barium and radium by utilizing the countercurrent batch fractionation of the chromates. The chromate procedure was evaluated by a comparison with the classic methods which employ the fractional crystallization of the halides. The chromate method is more practical on the basis of radium enrichment per fractionation step, control of precipitating conditions, simplicity, and speed of operation.
Date:
April 1, 1951
Creator:
Salutsky, Murrell Leon; Stites, J. G. & Joy, E. F.
Object Type:
Report
System:
The UNT Digital Library
Determination of half life of polonium-210 by counting: final report
Introduction: "A number of determination have been made of the half life of polonium-210 by calorimetry. Counting affords an entirely different method of determining half lives and requires only a small amount of activity. Therefore for comparison a half-life determination by counting was undertaken with a sample of approximately 0.5 millicurie of polonium."
Date:
June 1, 1951
Creator:
Curtis, Mary Lou
Object Type:
Report
System:
The UNT Digital Library
Analysis of Lid Tank Neutron Data for Lead and Iron
Abstract: An analysis of the lid tank neutron data for Pb-H2O and Fe-H2O is made. "Effective" fast neutron cross sections for the metals are obtained. This is based on the "one collision theory" of shielding. Values are 3.4 barns for Pb and 2.0 barns for Fe. These compare very well with those obtained by Albert and Welton based on other lid tank data and another method of calculation.
Date:
January 5, 1951
Creator:
Podgor, S.
Object Type:
Report
System:
The UNT Digital Library
Ceramic-Based Materials for High Temperature Service
The following report provides data that was discovered from a preliminary literature survey that was made to define the utility of the newer refractory ceramics or ceramic-based materials.
Date:
June 11, 1951
Creator:
Bates, W. A.
Object Type:
Report
System:
The UNT Digital Library
Fundamental Equations Describing Neutron Behavior in a Cavity
This report provides fundamental equations and maps to calculate neutron behavior in a spherical cavity.
Date:
May 22, 1951
Creator:
Willmer, D. B. & Imhoff, D. H.
Object Type:
Report
System:
The UNT Digital Library
Maximum Allowable Concentration for Air-Borne Beta Contamination
The following report discusses an equation derived by which the maximum allowable concentration in the atmosphere of a beta-omitting isotope for which lung damage is the limiting consideration can be calculated.
Date:
July 5, 1951
Creator:
Bailey, J. C. & Henry, H. F.
Object Type:
Report
System:
The UNT Digital Library
The Action of Oxygen on Activated Charcoal
The following report provides information conducted with the purpose of ascertaining the effect of oxygen on activated charcoal at approximately one atmosphere by measuring the amount of CO2 formed over a known length of time.
Date:
June 29, 1951
Creator:
Bigelow, J. E.; Belaga, M. W. & Mulvihill, R. J.
Object Type:
Report
System:
The UNT Digital Library
F Process: Final Report
This report follows an investigation on Great Lakes Carbon with the objectives to demonstrate their ability to make and F process purify reactor carbon on a commercial scale; and construct an F process pilot plant and use it in a survey of U.S. petroleum cokes to discover additional supplies of raw coke suitable for making reactor grade carbon.
Date:
March 15, 1951
Creator:
Leppla, Paul Warren & Markel, R. F.
Object Type:
Report
System:
The UNT Digital Library
Proportional Fission Neutron Counters
Abstract: Some proportional fission neutron counters are described with information on methods of preparation and details of a circuit for a portable model. The portable instrument has an efficiency of .01% for neutrons from polonium beryllium sources.
Date:
March 26, 1951
Creator:
Rohr, R. C.; Rohrer, E. R. & Macklin, R. L.
Object Type:
Report
System:
The UNT Digital Library
Conference on "Hot" Laboratory Design Held at Brookhaven National Laboratory on September 19, 1947
From introduction: "This conference represents the first attempt by a project-wide group of scientists and engineers to collaborate on the problem associated with the planning and design of "Hot" Laboratories. The idea, as originally conceived by Dr. W. E. Winsche, was to discuss some general and perhaps some specific aspects of "Hot" Laboratory design with a small group of interests individuals from various sites."
Date:
September 19, 1951
Creator:
Strickland, Gerald
Object Type:
Report
System:
The UNT Digital Library
Properties of Tin Oxide: Base Ceramics
From summary: "Various thermal and mechanical properties were measured for sintered tin oxide-matrix compacts which nominally were composed of 99 per cent by weight of tin oxide, SnO2, and one per cent by weight of zinc oxide ZnO...The tin oxide body might be expected to give good service under conditions of severe thermal shock and in an oxidizing atmosphere at temperatures up to 1500°F."
Date:
August 1, 1951
Creator:
Quirk, John F. & Herman, C. G.
Object Type:
Report
System:
The UNT Digital Library
Fixed Frequency Cyclotron Theory
Report describing the results of the motion of an ion in a fixed frequency cyclotron that were obtained for the ORNL cyclotron.
Date:
1951
Creator:
Cohen, Bernard Leonard, 1924-
Object Type:
Report
System:
The UNT Digital Library
Some Physical and Chemical Properties of Curium
Report discussing improved methods of isolating and producing curium, as well as its density, the absorption spectrum of Cm⁺³, and the molar magnetic susceptibility of CmF₃.
Date:
April 16, 1951
Creator:
Crane, William Ward Turner
Object Type:
Report
System:
The UNT Digital Library
Preparation of Some Protactinium Compounds and the Metal
Report discussing methods for preparing various protactinium compounds, including protactinium oxides, tetrafluoride, and oxysulfide. Additionally, a method for making the protactinium metal is mentioned.
Date:
April 6, 1951
Creator:
Sellers, Philip A.; Fried, Sherman; Elson, Robert E. & Zachariasen, William H.
Object Type:
Report
System:
The UNT Digital Library
Elementary Theory of Neutron Sources in Reactors
The following report discusses neutron sources in reactors, discussing general conditions of the study using a flux reactor.
Date:
May 18, 1951
Creator:
Masket, Albert Victor Hugo, 1914-
Object Type:
Report
System:
The UNT Digital Library
The Diffusion of Slow Neutrons in Absorbing Materials
The following report describes the process of diffusing slow neutrons in absorbing materials and possible situations where the process is needed.
Date:
1951
Creator:
Wigner, Eugene Paul, 1902-1995
Object Type:
Report
System:
The UNT Digital Library
The Counting Efficiency of Pa²³³
Abstract: "The counting efficiency of Pa²³³ has been determined by comparison of the counting rate of Pa²³³, under stated conditions, with the disintegration rate of U²³³ produced by Pa²³³ decay."
Date:
February 27, 1951
Creator:
Karraker, David George, 1923-
Object Type:
Report
System:
The UNT Digital Library
Potentiometric Titration of Milligram Quantities of Uranium in the Presence of Iron
Report discussing "the reduction of uranium(VI) with a slight excess of chromous sulfate followed by a potentiometric titration of the uranium(IV) with standard ceric sulfate in an atmosphere of carbon dioxide." This method cannot be used at room temperature.
Date:
December 29, 1951
Creator:
Hahn, Richard Balser & Kelley, Myron T.
Object Type:
Report
System:
The UNT Digital Library
The Vanadium-Uranium Constitutional Diagram
Abstract: "Vanadium-uranium equilibrium studies were made on alloys prepared from high-purity vanadium and good biscuit uranium. No intermetallic phases occur in the system. Additions of vanadium lover the uranium melting point and transformations producing a eutectic at 1240 +/- 5 C and eutectoid reactions at 727 +/- 5 and 652 +/- 5 C. The maximum solubility of uranium in vanadium is about 4 atomic per cent (15 weight per cent)."
Date:
December 15, 1951
Creator:
Saller, Henry A. & Rough, Frank A.
Object Type:
Report
System:
The UNT Digital Library
The Determination of Hydrogen in Magnesium, Lithium, and Magnesium Alloys
The following report describes the process of the determination of hydrogen in magnesium, lithium, and magnesium alloys, including methods of analyzing magnesium-lithium alloys for hydrogen, and the tin-fusion method used for determining the hydrogen content of pure magnesium that can also be used to analyze pure lithium for hydrogen.
Date:
November 13, 1951
Creator:
Mallett, Manley William, 1909-; Gerds, A. F. & Griffith, C. B.
Object Type:
Report
System:
The UNT Digital Library
Note on the Doppler Effect
The following report notes a general formula for the determination of the effect of atomic motion on nuclear cross sections, and evaluate the expression exactly in a few cases of interest.
Date:
November 26, 1951
Creator:
Coveyou, R. R.
Object Type:
Report
System:
The UNT Digital Library
Some Properties of High-Purity Zirconium and Dilute Alloys With Oxygen
Abstract: A systematic investigation has been made of the physical and mechanical properties of dilute alloys of oxygen in high-purity iodide-refined zirconium. A marked strengthening effect was observed as a result of oxygen additions. Results of tensile tests at elevated temperatures up to 400°C are also presented. Preparation of alloys is discussed in detail.
Date:
April 1951
Creator:
Treco, R. M.
Object Type:
Report
System:
The UNT Digital Library
Displaced Atom Densities in Cyclotron Irradiated Metals
From introduction: "The purpose of this report is to present some design and construction data for automatic titrators."
Date:
December 3, 1951
Creator:
Brooks, F. C.
Object Type:
Report
System:
The UNT Digital Library
The Coulometric Determination of Uranium
The following report describes a study that was made to adapt a redox method that oxidizes uranium(IV) to uranium(VI) by ferric ion into a microcoulometric method.
Date:
December 3, 1951
Creator:
Carson, W. N., Jr.
Object Type:
Report
System:
The UNT Digital Library