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4,972 Matching Results
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Improved Directions for the Preparation of X(OC₂H₅)₅
This report was written to replace the directions submitted on April 12, 1943 with improved directions for the preparation of chemical solution X(OC₂H₅)₅.
Date:
November 20, 1943
Creator:
Gilman, Henry
System:
The UNT Digital Library
Experimentation on the Extraction of Uranium from Western Ores by Leaching with Sodium Carbonate and Sodium Bicarbonate
Purpose: "The purpose of the following experiments was to obtain data on the selective extraction of uranium over vanadiur from samples of vanadium ores by leaching with sodium carbonate or sodium bicarbonate solutions, with the object of establishing the time, temperature, and concentration conditions necessary for satisfactory extractions."
Date:
December 3, 1943
Creator:
Saunders, E. R. & Carosella, M. C.
System:
The UNT Digital Library
Physical Properties of Uranyl Sulfate Solutions
Abstract: Measurements are reported of the solubility of uranyl sulfate in water at several temperatures, of the density of uranyl sulfate solutions as a function of concentration, of the variation of density of uranyl sulfate solutions of three different concentrations over a temperature range from 0[degree]C. to about 93[degree]C., and of the pH of uranyl sulfate solutions as a function of concentration as well as of temperature. The pH measurements were taken on uranyl sulfate samples prepared in several different ways and some conclusions are drawn as to the purity of theses samples.
Date:
December 15, 1943
Creator:
Helmholz, Lindsay. & Friedlander, G.
System:
The UNT Digital Library
Metallurgical Laboratory, Chemical Research - Analytical, Graphite Purity Research Program
Abstract. Chemical analytical studies of graphite raw materials have revealed new sources of petroleum cokes and pitches of greater purity than those previously used in the manufacture of project graphite. The use of these raw materials of exceptional purity has resulted in an improvement in k of the order of one per cent as compared with the AGOT-AGNT graphite typical of the previous production. A study of the graphitizing process has shown that no dangerous impurities are introduced in the graphite in manufacture; rather, the process actually purifies. furthermore, impurities are distributed homogeneously within the furnace charge; thus the AGOT-AGNT distinction is no longer necessary. A comparison of the methods of graphite testing has demonstrated excellent correlations between chemical analytical data, the results of the function test at Argonne, and the sigma pile experiments. It may therefore be inferred that chemical testing should be an adequate control of the graphite purity. Methods are described for the analysis of ash, B, V, TI, FE, and Ca in petroleum coke, pitch, and graphite.
Date:
December 22, 1943
Creator:
Boyd, G. E.; Curtis, R. E. & Johnston, W. H.
System:
The UNT Digital Library
Experimentation on the Extraction of Uranium from Western Ores
The following report supplements a previous report by E.R. Saunders and M. C. Carosella and a report by A. J. Gailey and E. O. Brimm based around the same subject. This report describes a number of tests in which leaching temperatures of 115 and 125 C were tried for the extractions of uranium from western ores.
Date:
December 27, 1943
Creator:
Saunders, E. R. & Carosella, M. C.
System:
The UNT Digital Library
The Leakage of Neutrons from a Heterogeneous Pile
Abstract: "The leakage of neutrons from a heterogenous pile with finite aides is calculated developing the method used in CP-992. The change in the fraction of neutrons absorbed by the moderator is obtained using the results of the calculation of the leakage."
Date:
December 27, 1943
Creator:
Plass, Gilbert N.
System:
The UNT Digital Library
Chemical Research — General Chemistry: Report for Period of February 1 to March 10, 1944
A report which investigated vacuum distilation, entrainer gas distillation, and entrainer gas plus bromine vapor distillation.
Date:
1944
Creator:
Ames Project
System:
The UNT Digital Library
Report No. EC-3, dated from November 6, 1943 to December 31, 1943 Contained in Engineer's Log Book
This technical report contains day by day experimental data reported in Engineer's Log Book, Electro-Chemistry Department, supporting Report No. EC-11 dated November 15, 1944, by W. L. Grube, Research Laboratories Division, General Motors Corporation.
Date:
January 3, 1944
Creator:
Grube, William L.
System:
The UNT Digital Library
The Statistics of the Hypocritical Water Boiler
From introductory paragraph: "In a slightly hypocritical water boiler the introduction of a single neutron may give rise to a fairly large burst of neutrons which dies out slowly. As was shown some time ago by Frankel and Nelson with the help of A. Horn the statistics of this multiplication process can be treated in a simple way for the hypothetical case that the number of neutrons produced per fission is two."
Date:
January 8, 1944
Creator:
Frankel, S. P.
System:
The UNT Digital Library
Temperature Rise in a Heat Producing Cylinder Under a Coating Defect
Abstract: "For defects between interior and coating, or between successive layers of coating, a simple, fairly accurate formula is established. The temperature rise at the edge of the defect is briefly discussed."
Date:
January 25, 1944
Creator:
Ginsburg, M.; Karush, W. & Young, G.
System:
The UNT Digital Library
An Analytical Method for Determining Hydrogen in Tuballoy
Technical report describing a gasometrical method for the determination of H2 in extruded U rods.
Date:
February 9, 1944
Creator:
Russell, H. W. & Nelson, H. R.
System:
The UNT Digital Library
Uranium Hydride, a Review to January 1, 1944
Abstract. A review of all work on uranium hydride published in the CC, CT, CN and CE reports to January 1, 1944, is presented. Some additional information not yet published has been included, so this report includes all data known from the above sources and at Ames to the above date. This report supersedes all previous report on uranium hydride coming out of the Ames laboratory.
Date:
February 10, 1944
Creator:
Newton, A. S.; Warf, J. C.; Johnson, O. & Nottorf, R.
System:
The UNT Digital Library
The Fission Neutron Spectrum of 25
Abstract: "Photographic plates have been used to measure the energy of neutrons from the fission of 25. The spectrum as inferred from the ranges of 850 protons recoiling in the forward direction shows a very wide maximum at ~1.5 Mev with an exponentially decreasing high energy tail which extends beyond 7 Mev. The minimum energy neutrons recorded were ~700 kv. If the spectrum is extrapolated to zero, one finds that this average neutron energy is about 1.85 Mev. The stopping power of the plates was calibrated by the use of monochromatic neutrons from the Li-7(pn) Be-7 reaction and the d-d reaction."
Date:
February 11, 1944
Creator:
Richards, Hugh T. & Perlman, Isadore
System:
The UNT Digital Library
Metallurgical Laboratory, Chemical Research - Radiation Chemistry, the Effect of Radiation on Water and Aqueous Solutions of Inorganic Substances
Technical report summarizing our knowledge of the chemical effects of ionizing radiation upon water and upon aqueous solutions of inorganic compounds. The types of radiation considered are beta rays, gamma and X rays, and heavy particles, notably neutrons, deuterons, alpha rays and fission recoils.
Date:
February 22, 1944
Creator:
Allen, A. O.
System:
The UNT Digital Library
Specifications for the Freezing Point Method for Determination of the Amount of HF in UF₆
From introduction: "You will find enclosed the specifications for the freezing point method for determination of the amount of HF in UF₆. The specification for cleaning new shipping containers is also included."
Date:
February 26, 1944
Creator:
Priest, Homer F.
System:
The UNT Digital Library
The Heavy-Water Homogeneous Pile: a Review of Chemical Researches and Problems
Technical Report: A generalized review of the chemical problems and researches related principally to the heavy water homogeneous pile is presented herewith. The report covers researches performed principally by the Columbia Group who initiated the study. This report contains a chronological outline of the development, a discussion of some special topics whose significance is paramount in any slurry pile discussion, and finally an outline of important research problems remaining, roughly graded in order of their importance. No attempt has been made to be either complete or detailed in the discussion. The emphasis has been principally on furnishing a broad guide to those who may t some future date take up this work.
Date:
February 28, 1944
Creator:
Hiskey, C. F. & Eidinoff, Maxwell Leigh, 1915-
System:
The UNT Digital Library
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
System:
The UNT Digital Library
A Study of the Deposition of Boron on Glass and on Metals in the Development of Methods for the Preparation of Diborane
Report discussing an experiment in which films of boron were deposited on glass and on metals by the thermal deposition of diborane at tempertatures between 500 and 600°C.
Date:
March 27, 1944
Creator:
Schlesinger, H. I.; Schaeffer, George W. & Barbaras, Glen D.
System:
The UNT Digital Library
Ames Project, Chemical Research - Analytical Chemistry, Report for Period of February 1 to March 10, 1944
Technical report covering (1) analysis of uranium bromide and chloride samples, (2) the ferric-nitrate method of analyzing uranium fluorides for fluorine, (3) spectrographic determination of boron, cadmium and manganese in magnesium metal, (4) service analyses. contributions to other problems, (5) attempted preparation of uranous oxyfluoride, and (6) corrections in previous reports.
Date:
April 13, 1944
Creator:
Spedding, F. H. (Frank Harold), 1902- & Wilholm, H. A.
System:
The UNT Digital Library
Capture of Fast Neutrons by Pb208
From abstract: "Comparison of the activity produced by fast neutrons on lead with other activations corroborates the assignment of the 3.2 hr. activity as Pb209, and the assignment of the reaction as capture of fast neutrons. Two different measurements show that the neutrons captured have energies greater than 100 KEV. This average capture cross section for primary neutrons from 7.5 MEV deuterons on a thick target of beryllium is measured as 10[^]-27 ca[^]2."
Date:
April 17, 1944
Creator:
Levinger, Joseph S., 1921-; Compton, A. H.; Allison, Samuel King, 1900-1965; Watson, W. W. & Snell, A. H.
System:
The UNT Digital Library
Determination of Free Nitric Acid in UNH Solutions, Problem Assignment No. 208-X2A, Progress Report
Technical report abstract: Since UNH is a highly dissociated compound which ionizes to NO3 and (UO2), the latter ion being very weakly basic, a solution of pure UNH is quite acid (pH about 3). It is possible to titrate to a phenolphthalein and point with standard caustic solution and obtain a figure which represents the free acid plus the NO3 from the the UNH. However, titration of the free nitric acid alone in such a solution presents quite a problem. By precipitating and removing uranium from solution by means of potassium ferrocyanide, the residual free acid may be titrated directly by means of standard caustic using either methyl red or phenolphthalein indicators, with an error of less than 4%. A method is given to determine formic acid, should that acid be present in the mixture.
Date:
April 21, 1944
Creator:
Parlour, A. K. & Hammond, C. W.
System:
The UNT Digital Library
The Motion of Massive Particles Through Solid Matter
Report concerning the behavior of atoms dislodged from their positions in solid constituents by neutrons during the transition from high energy to thermal energy.
Date:
April 27, 1944
Creator:
Seitz, Frederick, 1911-2008
System:
The UNT Digital Library
Columbia Scaling Circuits
Abstract: "The advantages of high scaling ratios in counting random pulses are discussed. The mechanism of the basic circuit used in the Columbia University scaling circuits is described. The difficulties experienced in the performance of the earlier circuits are indicated and modified circuits to eliminate these difficulties are given. Precautions that must be observed in carrying out the constructional details are suggested. The complete circuit and specifications are given in detail for a Scale of 128 for use with linear-amplifier systems" (p. 1).
Date:
May 2, 1944
Creator:
Glassford, H. A. & Dunning, J. R.
System:
The UNT Digital Library
Metallurgical Laboratory, Chemical Research - Heavy Water, Report for the Month Ending May 1, 1944
Technical report with short reports on (1) Heavy water analysis and standardization, and Specific gravity of pure D2O; (2) Homogenous exponential experiment; (3) Recombination of pile gases; (4) Slurry pumping studies; and (5) Electron microscope laboratory.
Date:
May 16, 1944
Creator:
Hogness, T. R. (Thorfin Rusten), 1894-; Hiskey, C. F. & Eidinoff, Maxwell Leigh, 1915-
System:
The UNT Digital Library