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Radiometric Analysis of Thick Samples
Introduction: Measurements of polonium content in solids are usually performed by dissolving the material and preparing a thin sample which can be measured with one of the available instruments. A measurement of the radiation emerging from the thick sample should be sufficient to evaluate the polonium content. For this reason a calculation has been performed and the results have been compared with those obtained by the thin sample method. Obviously this proposed method using thick samples would be faster.
Date:
March 1, 1944
Creator:
DeBenedetti, Sergio
Object Type:
Report
System:
The UNT Digital Library
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 circuit is exactly the same as the California circuit now used by the chemical section for alpha counting. A type 961 Offner scaler was used for these tests. None of the latest Offner scalers type961A, were available to us when the tests were made. Method of testing is given, results are tabulated, computations are made, and eight graphs are given. it appears that the Clinton amplifiers used with a Offner scaler will give substantially the same performance as that given by the California circuit.
Date:
July 1, 1944
Creator:
Ostdahl, H. E.
Object Type:
Report
System:
The UNT Digital Library
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 metal upon treatment with various acids and upon fusion withKHSO4 is described. three satisfactory procedures are given for dissolving the metal with sulfuric acid, phosphoric acid, and by a potassium hydrogen sulfate fusion. The laboratory was presented with the problem of analyzing for a large number of elements in O2 metal. the results of a systematic study of methods for effecting solution of the metal are offered here since they may be of some interest and use to other laboratories. The four methods which effected complete solution of the metal are (1) Sulfuric acid method; (2) Fusion method; (3) Phosphoric acid method; and (4) Nitric acid-hydrofluoric acid method.
Date:
January 1, 1945
Creator:
Byerly, W.; Niedrach, L.; Davin, W.; Dyas, H. & Bane, R. W.
Object Type:
Report
System:
The UNT Digital Library
Testing of Counter-Scaler Units for Statistics
Report discussing the results of an investigation of a test for statistical consistency of counter-scaler units.
Date:
January 1, 1945
Creator:
Coveyou, R. R.
Object Type:
Report
System:
The UNT Digital Library
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.)
Object Type:
Report
System:
The UNT Digital Library
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 solutions whose sulfate content was varied over wide limits [SO4--/Th(IV) (in solution before precipitation) = 0.005 to 67.0] yielded a solid, isomorphous with thorium peroxide nitrate and containing 3.0 to 3.8 peroxide oxygen atoms for each thorium atom. The sulfate content of this latter phase varied continuously between the limits SO4--/Th(IV) = 0.34 to 0.01 with nitrate ion present when the sulfate content was very low. This continuous variation in composition is in agreement with the previously proposed structure of this phase.
Date:
October 1, 1945
Creator:
Hamaker, John W.
Object Type:
Report
System:
The UNT Digital Library
The Determination of Tuballoy in the Presence of Thorium in Peroxide Effluents and Cakes
Abstract: "A polarographic method for the determination of tuballoy in thorium peroxide cakes in all sold medium was found to give satisfactory results. Fluorescent analyses on effluents containing thorium gave good results if the thorium content was kept below 1 mg/liter."
Date:
February 1, 1946
Creator:
Lasko, Wiliam. R. & Susano, C. D.
Object Type:
Report
System:
The UNT Digital Library
The Uranium-Cobalt System
Abstract: "A phase diagram for the uranium-cobalt system has been constructed, based on thermal, microscopic, X-ray and chemical data. The results indicate the existence of three compounds and two eutectics, one of which shows a lowering of the melting point of uranium by approximately 400 C."
Date:
March 1, 1946
Creator:
Noyce, William Knight & Daane, A. H.
Object Type:
Report
System:
The UNT Digital Library
The Detection of Small Amounts of Fluorine in Large Amounts of Chlorine
Abstract: "Tests have been developed for both the qualitative detection and quantitative determination of fluorine in chlorine. The qualitative test is made by passing the gas through manganous chloride. If the pink solid tubes brown there is greater than 0.5 percent of fluorine in the gas. The quantitative test is a modification of the Steiger and Marvin Test with oxidized titanium solution."
Date:
April 1, 1946
Creator:
Lafferty, Robert H., Jr. & Winget, Rasho
Object Type:
Report
System:
The UNT Digital Library
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.
Object Type:
Report
System:
The UNT Digital Library
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, heating, or temperature to be expected as the charge or coil is changed. Units and conversion factors are mentioned briefly.
Date:
February 1, 1947
Creator:
Bromley, LeRoy A.
Object Type:
Report
System:
The UNT Digital Library
Physical Constants of Uranium Tetrachloride
Abstract: Exceedingly pure uranium tetrachloride was prepared for use in determining the physical constants of the compound. Measurements were obtained of the melting point and boiling point at pressures ranging from the triple point pressure to atmospheric pressure. Calculations were made of the vapor pressure equation for the liquid, the heat of evaporation, molar boiling point elevation, the vapor pressure equation for the solid, and the critical temperature.
Date:
April 1, 1947
Creator:
Young, H. S. & Grady, H. F.
Object Type:
Report
System:
The UNT Digital Library
Purification of Uranium Tetrachloride by Fractional Condensation
"The effect of a single vacuum sublimation of contaminated uranium tetrachloride, with fractional condensation of the vapors, was investigated to determine whether a high degree of purity would result. It was found that this procedure was an excellent and simple method for obtaining exceedingly pure uranium tetrachloride."
Date:
April 1, 1947
Creator:
Young, H. S. & Susano, C. D.
Object Type:
Report
System:
The UNT Digital Library
Reactivity of Dibutyl Carbitol
Report discussing experiments to determine if the tri-ether (referred to in the report as dibutyl carbitol or carbitol) "was susceptible of a high degree of reactivity when used as an extraction agent for the removal of uranium from aqueous solutions."
Date:
April 1, 1947
Creator:
Susano, C. D.
Object Type:
Report
System:
The UNT Digital Library
Process Monitor Analysis Victoreen Model 350
Abstract: An analysis of the improved Model Number 350 Process Monitor was made so that it could be determined if this instrument would fulfill the need for gamma radiation detection instruments in the production buildings of Y-12. The results of these tests indicated the possibility of marked improvement in the monitor characteristics with minor redesigns. After these improvements have been made, this instrument will be a satisfactory monitor for this area.
Date:
May 1, 1947
Creator:
Harter, J. A. & Olson, E. L.
Object Type:
Report
System:
The UNT Digital Library
Quarterly Report May 1947 to August 1947 : Biology Division
The following documents were compiled into a quarterly report that was to be published in the Radiobiology Volume of the PPR. The following reports provide data from the Biology department of the University of Chicago between May and August of 1947.
Date:
August 1, 1947
Creator:
Brues, Austin M.
Object Type:
Report
System:
The UNT Digital Library
Quarterly Report August 1947 to November 1947, Biology Division
The following document is a compilation of quarterly reports from August 1946 to November of 1947 from the Biology Division of the University of Chicago.
Date:
November 1, 1947
Creator:
Brues, Austin M.
Object Type:
Report
System:
The UNT Digital Library
Topical Report on Literature Survey of Treatments for Monazite Sands
The following report covers the literature available in the Battelle library as well as the Atomic Energy Commission (New York, N.Y.) on the processing of monazite sands for thorium and rare earth contents.
Date:
November 1, 1947
Creator:
Willigman, M. & Slowter, E. E.
Object Type:
Report
System:
The UNT Digital Library
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
Object Type:
Report
System:
The UNT Digital Library
Processing Tests in Granular Resistance Furnaces for Preparing High Purity Graphite
Report discussing two trial runs for a grannular resistance processing furnace, in which the goal was to produce high purity graphite. These tests were a continuation of a series of trial runs that had previously yielded inconsistent results.
Date:
March 1, 1948
Creator:
Sermon, G. T.
Object Type:
Report
System:
The UNT Digital Library
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 any desired specifications of rate and/or equilibrium. A continuous process involving multiple extraction stages with a controlled pH gradient is proposed for obtaining maximum decontamination and plutonium recovery.
Date:
June 1, 1948
Creator:
Rubin, B. (Barney), 1924- & Hicks, T. E.
Object Type:
Report
System:
The UNT Digital Library
Tentative Specification for Waste Heat Steam Boiler
Report discussing specifications for the design of a waste heat steam boiler "for the purpose of generating steam to operate a condensing steam turbine electric generator from the clean hot radioactive air that has cooled the atomic energy reactor of [a] laboratory under a pressure less than atmospheric."
Date:
August 1, 1948
Creator:
Williams, C.
Object Type:
Report
System:
The UNT Digital Library
Report on Hack's Canyon Uranium Mine, Mohave County, Arizona
This is a geological report on the uranium mine in Hack's Canyon, Mohave County, Arizona.
Date:
September 1, 1948
Creator:
Dunning, Charles H.
Object Type:
Report
System:
The UNT Digital Library
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
Object Type:
Report
System:
The UNT Digital Library