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369 Matching Results
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Neutron Measurements with Cadmium Coated Chambers
The following report discusses measurements for slow and fast neutrons from cadmium coated ionization chambers.
Date:
September 30, 1943
Creator:
Wilson, H. A.
Object Type:
Report
System:
The UNT Digital Library
Engineering Group Instrument Specification Report : Tests on Aquadag Treated Polyethylene Cable
Effect of aquadag coating on noise reduction in polyethylene coaxial cable was tested. A satisfactory combination of coaxial cables and connectors interconnecting sources of small ion currents or ionizing impulses with the measuring device is described.
Date:
September 4, 1944
Creator:
Weller, Barton L. & Dorsey, John M.
Object Type:
Report
System:
The UNT Digital Library
Computed Values of X-Ray Lines and Limits for the Trans-Uranic Elements
Report detailing values of x-ray lives and limits for trans-uranic elements. Formulas and methods are detailed throughout the report.
Date:
September 6, 1944
Creator:
Monk, Ardis T. & Allison, Samuel King
Object Type:
Report
System:
The UNT Digital Library
Third Form of Bismuth Phosphate - X-ray Study
Abstract. In addition to the hexagonal and monoclinic bismuth phosphate precipitates, whose structures are now known, a third crystalline phase has been found to appear in BiPO4 precipitates after (a) extremely long digestion in concentrated nitric acid; (b) oven drying at 800 degrees to 1000 degrees. Thought very small single crystals of the component have been isolated, nor crushed sample contained less than 30% of the beta-form. The cell size and symmetry of the crystal indicates that there ae two bismuth atoms in the cell, and there is no evidence that the compound is not BiPO4. It is suggested that this maty be a third form of BiPO4, stable over a short range of conditions, and tending to revert to the beta-form.
Date:
September 7, 1944
Creator:
Mooney, Rose Camille Le Dieu
Object Type:
Report
System:
The UNT Digital Library
Properties of Uranyl Fluoride
Abstract: Pure UO2F2 is made by reaction between anhydrous HF and pure UO3. Although it is difficult to prepare free of water, it is not very hygroscopic. Prolonged heating at 100-105 degrees releases 99.9% of the water in an aqueous solution; the rate of loss of water is very small after saturation is reached. X-ray diffraction data give a density of 6.2 for the solid. The density of a 1.004 M solution is 1.274; the density of a saturated solution (5.130 M) is 2.400. The densities of F-9 solutions have been calculated from the densities of ordinary aqueous solutions, and the values are compared graphically. Data on the solubility indicate that there is a small increase in the range 25-100 degrees. Recovery of pure F-9 from a solution is hampered by hydrolysis of U)2F2 to give HF. The HF may be held back by addition of UO3 or CaO; the use of the latter, however, makes more difficult the recovery of all the F-9. Molar conductivities of UO2F2 solutions at 25 degrees, as well as the specific conductivities of a 1 molar solution containing various concentrations of UO3, have been determined. The addition of UO3 lowers the conductivity. The low …
Date:
September 11, 1944
Creator:
Dean, G. R.
Object Type:
Report
System:
The UNT Digital Library
Test Results on Bias Setting for the Chicago Scaler Offner Models
Abstract: The counting accuracy of the Chicago Scalers, Models 961A and 961B, is a function of the bias setting of the limiter (V2). this report gives quantitative data supporting this thesis. A method of making bias settings is suggested. These tests were run at the suggestion of Mr. V. C. Hanson.
Date:
September 11, 1944
Creator:
Bradley, Wendell H.; Epstein, Bernard. & Wakefield, Ernest
Object Type:
Report
System:
The UNT Digital Library
Flexibility of a Tube in Which Slugs Slide
An approximate calculation is made of the variations of the flexibility of a long cartridge with the length of the slug used, assuming that the jacket slides without friction.
Date:
September 13, 1944
Creator:
Young, G.
Object Type:
Report
System:
The UNT Digital Library
Uranium Oxide Slurry Pumping Experiments
Abstract: Experiments on colloid milling and pumping show that uranium trioxide, when carefully dehydrated, can be dispersed in water to form a relatively stable slurry, suitable for a homogeneous slurry pile. At temperatures considerably below those of anticipated pile operation particle size growth occurs attended by increase in settling rate and decrease in viscosity. Theses properties of the slurries may be strongly affected by impurities present as well as by special operating conditions.
Date:
September 15, 1944
Creator:
Brandt, R. & Dean, G. R.
Object Type:
Report
System:
The UNT Digital Library
A Final Report on the Experiment : the Penetration of Graphite of Different Purities by Lead Bismuth Eutectic
Bi-Pb eutectic and pure Bi penetration of graphites of various densities under 300 degrees C and pressures up to 20 psi was found be of the order of magnitude of 1.0 g/cm(2) and was uniform throughout the graphite. Bi was absorbed less than the eutectic but the oxidation rate of Bi would be prohibitive. There was heavy nitriding in N atmospheres with the Bi and the eutectic.
Date:
September 25, 1944
Creator:
Stroud, William G.
Object Type:
Report
System:
The UNT Digital Library
Abrasive Blasting for Cleaning Parts
Abstract: A demonstration on August 22, 1945, showed that Alpha or Beta M or K parts, including insulators, can be well cleaned with a pressure-feed abrasive blaster. The abrasive is a slurry of alumina and water mixed with high velocity air in a special feed nozzle. The slurry is continuously recycled.
Date:
September 1945
Creator:
McWherter, Jack R. & Yerazunis, Stephen
Object Type:
Report
System:
The UNT Digital Library
An Attempt to Detect Small Amounts of Irradiation Injury
The following document analyzes data on blood changes, sterility, emaciation and lassitude to detect small amounts of irradiation injury.
Date:
September 1945
Creator:
Cupp, M. B.
Object Type:
Report
System:
The UNT Digital Library
Sweeping of Fission Gases from Solutions of U and Plutonium
Technical report describing two experiments performed to compare the amounts of fission gases swept out of UNH solution with those amounts swept out of PU solution under idential condiditons. The charge wire technique was used. The essential date and the results are given in tables in the report.
Date:
September 4, 1945
Creator:
Adams, R. M. & Finkelstein, H.
Object Type:
Report
System:
The UNT Digital Library
The Effect of Neutron Bombardment on the Specific Heat of Graphite at Low Temperatures
The work described in this technical report was undertaken as part of a larger program dealing with a systematic investigation of changes in the physical prosperities of artificial graphite due to neutron bombardment. Very pronounced among those changes is the increase in the elastic modulus. Since there is a general relationship between the elastic modulus of a given substance and its specific heat, it was expected that corresponding changes will occur in the specific heat. In conclusion, the experiments determined that it appears that the low temperature specific heat measurements of strongly bombarded samples will be helpful for the understanding of the nature and the mechanism of the changes produced by neutron bombardment and annealing.
Date:
September 5, 1945
Creator:
Estermann, I. (Immanuel), 1900-1973 & Kirkland, G. I.
Object Type:
Report
System:
The UNT Digital Library
The Solubility of Uranyl Oxalate and the Existence of Undissociated Uranyl Oxalate in Solution
Abstract: "The solubility of the solid, UO2C2O4 x rH2O, was measured at various acid and uranyl nitrate concentrations. The results of the measurements prove the existence of the uranyl oxalate complex - UO2C2O4, in solutions containing excess UO2^2."
Date:
September 8, 1945
Creator:
Pimentel, George C. & Stevenson, F. R.
Object Type:
Report
System:
The UNT Digital Library
Analysis of Iron in Thorium, Beryllium, and Cerium
Introduction. the colorimetric determination of iron based on the formation of the colored ferrous-1,10-phenanthroline complex has been used successfully by a number of investigators. In this technical report, its adaptation to the routine determination of iron in cerium, thorium, and beryllium metals and their compounds is described.
Date:
September 10, 1945
Creator:
Ericson, R. P & Fornefeld, E. J.
Object Type:
Report
System:
The UNT Digital Library
The Catalytic Decomposition of Hydrogen Peroxide by Iron Salts in Acid Solution
The following document discusses general theories of hydrogen peroxide decomposition.
Date:
September 15, 1945
Creator:
Pomeroy, J. H.; Grieger, P. F. & Gates, J. W.
Object Type:
Report
System:
The UNT Digital Library
Direct Conversion of the TF₆ to TCl₄
The following report provides a general summary of some methods that could be used to convert hexafluoride into tetrafluoride, but is mainly devoted to the work done on the conversion of tetrafluoride to tetrachloride.
Date:
September 25, 1945
Creator:
Calkins, Vincent P.
Object Type:
Report
System:
The UNT Digital Library
The Study and Calibration of P.I.G.'s in TCl₄ Vapor
Report discussing a study involving P.I.G.'s (Philips Ion Gage) in TCl₄ vapor in an all-carbon oven to compare data to a previous study involving P.I.G.'s in air. The purpose of the investigation was to determine the best P.I.G. in TCl₄ vapor and obtain its calibration.
Date:
September 28, 1945
Creator:
Scott, C.; Fuller, Harold Q.; Chelius, Leo G. & Starr, C.
Object Type:
Report
System:
The UNT Digital Library
Recovery of Tuballoy (Uranium) From Tantalum
Report discussing methods for the "separation of tantalum and tuballoy from used tantalum K's. These methods are: hydrofluorination, fluorination, hydrochlorination and dissolution in hydrofluoric acid -- nitric acid, hydrofluoric acid -- hydrochloric acid mixture, and hydrofluoric acid alone."
Date:
September 29, 1945
Creator:
Johnston, C. P. & Milch, A.
Object Type:
Report
System:
The UNT Digital Library
The Production of Beryllium by the Metallothermic Reduction of Beryllium Fluoride
Report discussing "the production of beryllium by the metallothermic reduction of its fluoride...Charges of BaF2 and Mg reacted smoothly when heated by induction in graphite crucibles and on continued heating the metal and slag separated fairly well. It was found that an addition of CaCl2 to the top of the charge facilitated the separation a great deal. Very clean, massive metal has been produced by this procedure."
Date:
September 30, 1945
Creator:
Spedding, F. H.; Wilhelm, H. A.; Keller, W. H. & Noher, Charles
Object Type:
Report
System:
The UNT Digital Library
Conversion of Uranium Hexafluoride to Uranium Trioxide
The following report describes the methods of chemical conversion of uranium fluoride to uranium trioxide.
Date:
September 5, 1946
Creator:
Brown, K. B. & Larson, C. E.
Object Type:
Report
System:
The UNT Digital Library
Recovery From Salvage Residue by Fluorination in Vertical Reactors
Report discussing trial runs of a method of recovery of uranium from salvage residue. The method involves hydrofluorination of the residue to remove large quantities of interfering silicates, followed by a fluorination treatment to remove uranium.
Date:
September 6, 1946
Creator:
Stevenson, K., Jr.; Blasewitz, A. G. & Clewett, G. H.
Object Type:
Report
System:
The UNT Digital Library
Half-Life of Polonium
Abstract: "The half-life of polonium has been measured by a calorimetric method using samples several thousand times larger than have been previously available. The value is found to be 138.3 +/- 0.1% days."
Date:
September 9, 1946
Creator:
Beamer, William H. & Easton, William E.
Object Type:
Report
System:
The UNT Digital Library
Corrosivity of Uranyl Fluoride to Certain Metals
Abstract: "The results obtained from the tests conducted for the purpose of determining the corrosivity of a 30 percent-solution of uranyl fluoride to various metals indicate that stainless steels (type 302, 304, 321 and 316) have very good resistance; while monel, nickel and aluminum, respectively, exhibit diminishing resistance. Stainless steel, type 316, was the most resistant of the specimen tested."
Date:
September 19, 1946
Creator:
Little, L. F. & Susano, C. D.
Object Type:
Report
System:
The UNT Digital Library