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- The Absorption of Fluorine and Uranium Hexafluoride by Sodium Carbonate Solutions
- From introduction: Complete removal of fluorine iron waste gases also containing uranium hexaflouride was the object of researches described in this chapter.
- The Acetate Complexes of Uranyl Ion and the Solubility of Sodium Uranyl Acetate
- The following report provides data based off of the solubility of sodium uranyl acetate that was measured under a variety if conditions.
- Alpha Particle Detection and the A. C. Operated Detector "A" (Howler)
- Abstract: This discussion concerns the operation, construction, and servicing of an alpha rate meter of medium sensitivity (30,000 alpha particles full scale per minute) and good stability. The instrument is equipped with an oscillator which increases both in frequency and loudness as the alpha activity is increased. The oscillator circuit includes an anticipator which causes a change in frequency depending directly upon the rate of change of alpha activity. Maximum sensitivity is approximately 100 millivolts full scale. Grid current varies from 1 to 5 x 10^-14 amperes. A general discussion of time constants and accuracy is included. Tables of stopping power, ionization and alpha activity are appended.
- Altitude-wind-tunnel tests of power-plant installation in jet-propelled fighter
- From Introduction: "The research program included clean-up tests (unpublished data) and stability and control tests (reference 1) made in the NACA Langley full-scale tunnel. An investigation of the aerodynamic characteristics of the power-plant installation in the Cleveland altitude wind tunnel is discussed in this report."
- Analyses of Alaska Coals
- Report issued by the Bureau of Mines discussing the coal fields of Alaska. Analyses of the Alaskan coal fields are presented in detail. This report includes tables, and a map.
- Analysis of cooling limitations and effect of engine-cooling improvements on level-flight cruising performance of four-engine heavy bomber
- From Introduction: "The difficulties experienced in cooling the exhaust-valve seats of the rear-row cylinders have been overcome to a considerable extent by improving the mixture distribution through application of the injection impeller (reference 1) and by augmenting the flow of cooling air to the critical baffles (reference 2). Flight tests of this airplane (reference 3) indicated that the temperatures of exhaust-valve seats on rear-row cylinders were markedly lowered by these modifications and that airplane range, altitude, and gross weight previously limited by these temperatures could be greatly increased."
- The Analysis of Impurities in Various Stages of Recycled Carbon Tetrachloride and Correlation with Chlorination Properties
- The following report discusses findings resulting from experiments on recycled carbon tetrachloride at various stages of the proposed purification process.
- An analysis of the airspeeds and normal accelerations of Douglas DC-3 airplanes in commercial transport operation
- From Introduction: "The present report is the second prepared to give the results of an analysis of V-G data from commercial transport airplanes. The present report is concerned with an analysis of data obtained with Douglas DC-3 airplanes flying over three transcontinental routes in the United States."
- An analysis of the indications of the University of Chicago airborne turbulence indicator in gusty air
- From Introduction: "The present report has been prepared to discuss the indications obtained from the University of Chicago turbulence indicator in relation to simultaneous measurement of atmospheric gustiness made by the NACA, which are summarized herein."
- The Bragg Reflection of Neutrons by a Single Crystal
- From cover page: This document has been assigned the above MDDC (Manhattan District Declassification) number, as given in the List of Declassified Documents issued semi-monthly by the Research Division, Manhattan District. In the case of Los Alapnos reports, LADC (Los Alamos Declassification) numbers are listed on the title page if known. This declassified document may differ materially from the original classified document by reason of deletions necessary to accomplish declassification. Hence, this copy of a declassified document does not constitute authority for declassification of classified copies of a similar document which may bear the same title and authors. Reference is made to District Circular Letter (Research Control 47-3) dated 31 October 1946, subject: "Instructions for Use of List of Declassified Documents," which outlines the procedure by means of which declassification of classified copies may be effected. Every effort has been made to reproduce with accuracy of detail the declassified document as certified for declassification. No corrections or changes have been made in the content of the document.
- The Charge on Uranium(VI) in Acid Solution
- Abstract. The distribution coefficient of U(VI) between perchloric acid solutions and benzene solutions of TTA has been measured as a function of the acidity. It was possible to interpret the data in terms of the charge on the U(VI) species present in the aqueous phase. The experiments indicate that U(VI) exists as an ion charge +2 at acidities from 0.1M to 2.5M. In the interpretations of the distribution data, it was necessary to know the acidity coefficient of the uranyl chelate in the benzene solution. This was determined by measurement of the solubility of the compound UO2K2 - xH2). The activity coefficient of UO2K2 was found to decrease rapidly as the concentration of TTA in the benzene phase increased above 0.1M. This is probably due to the formation of a species involving more than two TTA molecules per U(VI)
- Column Adsorption Methods in Analytical Chemistry
- Technical report. Numerous application of various column adsorption techniques to inorganic analytical chemistry have appear in the literature. The comparatively recent introduction of ion exchange resins has resulted in the development of efficient, simple, and rapid column adsorption methods. the principal service of column adsorption methods to analytical chemistry is that of providing a relatively simple means of separating an element in a sufficiently pure state so that a direct precipitation, ignition, and weighting, for example, will suffice to complete the quantitative analysis. Systems involving uranyl nitrate will naturally be emphasized in this report but information will be included concerning the separation of the individual members of a series from one another, such as in the alkaline earths and the rare earths.
- Comparison of Brush Process "Q" Beryllium with Extruded Cast Beryllium, Extruded Flake, and Extruded Turning
- The following report follows an investigation conducted to compare some physical and chemical properties of Brush beryllium bars made by their process "Q" and with those of extruded bars made from cast metal, from compressed Clifton flake metal, and from compressed turnings resulting from machining of previously extruded cast metal.
- Conversion of Uranium Hexafluoride to Uranium Trioxide
- The following report describes the methods of chemical conversion of uranium fluoride to uranium trioxide.
- The Coprecipitation of Thorium and Uranium Peroxides
- From abstract: "Experiments covering the coprecipitation of Thorium and Uranium peroxides are described on synthetic and actual 1300 cycle machine wash effluents."
- The Coprecipitation of Thorium and Uranium Peroxides
- From introduction: This report is concerned primarily with the coprecipitation phenomenon and its application to plant problems.
- 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."
- Crystal Densities of Uranium Chlorides
- Abstract: "Using xylene as the densimetric solvent, the crystal densities have been determined by the pyknometric method for the following chlorides, UCl3, UCl4, UCl6(UCl4), UCl6 and U02Cl2."
- The Deposition of Plutonium and Certain Fission Products in Bone as a Decontamination Problem
- The following report discusses the deposition of radioactive elements during a nuclear fission in the skeleton. Studies are concerned with chronic effects of toxic radiation developing within the bone marrow and decontaminating the cells.
- 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."
- The Detection of Uranium by X-ray Spectrometry
- Abstract: "The possibility of detecting small quantities of uranium with an X-ray spectrometer was investigated. An X-ray spectrograph was modified by substituting a geiger counter for the photographic film. Both primary and secondary methods of excitation were studied. Radiation background of high intensity and variability limits the sensitivity of the present apparatus to 1%. Suggestions are made for increasing the sensitivity of the method."
- The Determination of Small Amounts of Thorium in Some Uranium Materials
- Abstract: "A method for the determination of small quantities of thorium in the presence of large quantities of uranium is presented. Solid samples are dissolved in an appropriate acid. Reducible metals are removed by means of a mercury cathode. Excess acid is removed by fuming to dryness. The residue is dissolved in water and made alkaline with saturated ammonium carbonate solution, thus complexing the uranium and permitting the precipitation of thorium hydroxide with the aid of an aluminum hydroxide carrier. Thorium is determined colorimetrically with thoron."
- Determination of the Molecular Weight of "Tuballoy Pentachloride"
- The following report describes methods used to interpret analytical results of the molecular weight of tuballoy pentachloride.
- A Determination of the U-235 Content in Highly Impoverished Material
- Introduction: "The product of a special run made in XAX was submitted to the Assay Department for a determination of the residual content of the 235 isotope. The charge material on this run was impoverished, with a ratio of approximately 1:2,000. The sample was submitted in the form of purified T3O8."
- The Determination of Total Non-U Cations in UFâ‚„ by Penta-Ether Extraction
- "In consideration of the known high efficiency of penta-ether on the extraction of [Uranium] from aqueous solution without particularly affecting most other cations in the solution, it was felt that a TNU (total non-U cation) determination could be based upon the use of pents-ether to remove the U from non-U cations. After such separation, the non-U cations could then be determined in essentially the same manner as in the present TNU method (Method 50, CD-3801). The use of the penta-ether separation would have the advantage of reducing the amount of handling of the sample required in the present procedure and of reducing the time required to complete a TNU determination."
- 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."
- Diagnosis of Instability of an Assay Mass Spectrometer
- This report deals solely with the systematic diagnosis and location of the cause of instability of an assay mass spectrometer. It is based around a chart that illustrates the general practices followed in the laboratory.
- The Dissolution of Thorium Metal and Thorium Dioxide in HNO3 - HF and HNO3- ( NH4 ) 2 SiF6 Mixtures
- Abstract. A satisfactory method has been found for dissolving thorium metal and thorium oxide in heat-treated 25-12 stainless steel vessels without excessive corrosion of the vessels. The dissolution medium consists of strong HNO3 containing a small amount of fluoride or fluo-silicate. the fluoride required has no harmful effects on a subsequent solvent-extraction step for a separation of uranium isotopes from the dissolved thorium.
- Effect of Routing Upon Temperature of Cooling Stream
- With discussion under way concerning power production by chain reacting piles, it becomes pertinent to consider the ration of the temperature of the hottest spot in the pile to the average exit temperature of the cooling stream. This is important because the temperature of the hottest spot in the pile is one of the limiting factors in determining the maximum power at which a pile can be operated. However, the higher the temperature of the emerging cooling stream, the more efficient can be the thermal engine operated by it. Thus the ideal situation is to have the average exit temperature of the cooling stream as near as possible to the hottest temperature of the hottest spot in the pile.
- The Effect of Temperature on the Distribution of Nitric Acid Between Dibutyl Carbitol and Aqueous Solutions of Copper Nitrate
- This report follows a test made to determine the effect of temperature on the distribution of nitric acid between "carbitol" and gunk, extracting a number of samples of aqueous copper nitrate with samples of "carbitol" of various acidities. The data obtained is covered in Table 1.
- Elimination of Interference by Nickel in the Determination of Uranium by Means of Zinc Amalgam Reductors
- The following report was undertaken to overcome poisoning difficulties that are caused by passage of solutions containing nickel through the Jones reductor/zinc amalgam reductors.
- Evaluation of Gust and Draft Velocities from Flights of P-61c Airplanes within Thunderstorms 2 - July 9, 1946 to July 11, 1946 at Orlando, Florida
- "The results obtained from an evaluation for gust and draft velocities of acceleration and airspeed-altitude records taken by NACA recording instruments installed in P-61c airplanes participating in thunderstorm flights 6, 7, and 8 of July 9, 1946, July 10, 1946, and July 11, 1946, respectively, are presented herein. These data are summarized in tables I and II. In accordance with a recent discussion with a member of the U.S. Weather Bureau staff, the tabulated results for the present flight include in addition to data of the type presented in reference 1, the initial heading of the airplane for each traverse, the pressure altitude at the start of each traverse in increments of 500 feet, and the gust gradient distance when it could be evaluated" (p. 1).
- Evaluation of Gust and Draft Velocities from Flights of P-61c Airplanes within Thunderstorms August 7, 1946 to August 13, 1946 at Orlando, Florida
- This report presents the results obtained from gust and draft velocity measurements within thunderstorms for the period August 7, 1946 to August, 13, 1946 at Orlando Florida. In several of the surveys, indications of ambient air temperature were obtained from photo-observer records. These data are summarized in the report.
- Exploration, Composition, and Washing, Burning and Gas-Producer Tests of a Coal Occurring Near Coaldale, Esmeralda County, Nevada
- Technical paper issued by the Bureau of Mines over investigations of available coal in Esmeralda County, Nevada. Exploration of the coal deposits is discussed. This paper includes tables, maps, photographs, and illustrations.
- Exploration of Red Mountain Chromite Deposits, Kenai Peninsula, Alaska
- Report issued by the U.S. Bureau of Mines investigating the chromite deposits of Red Mountain on Kenai Peninsula, Alaska. Research methods include surface sampling and core drilling. The report includes tables, maps, and illustrations.
- Exploration of Stiner and Bunch Hollow Zinc Properties, Powell River Area, Union and Claiborne Counties, Tennessee
- Report issued by the U.S. Bureau of Mines on the exploration of zinc ore deposits surrounding the Powell River area in Tennessee. Drilling methods and ore concentrates are presented. This report includes tables, and maps.
- Exploration of the Avon Mica District, Latah County, Idaho
- Report issued by the U.S. Bureau of Mines on the investigations conducted on the mica deposits found in Latah County, Idaho. Characteristics and properties of the mica deposits are listed. This report includes tables, and maps.
- Exploration of the Mount Hope Mine, Eureka County, Nevada
- Report issued by the U.S. Bureau of Mines on the exploration of the Mount Hope mine. Analysis of samples obtained from core-drilling are listed. This report includes tables, maps, and illustrations.
- Fabrication of Ceramic Shapes
- Abstract: "This report indicates some of the methods employed at Los Alamos for the fabrication of refractory products."
- Factors Affecting the Chlorination of Uranium Compounds with Liquid Carbon Tetrachloride
- Abstract: "A summary of the contents of numerous reports on the liquid phase proportion of uranium chloride."
- Factors Affecting the Extraction of Uranium with Dibutyl Carbitol
- Abstract: "This is a compilation of the material in several reports on the extraction of uranium from aqueous solutions with dibutyl carbitol. Data is presented concerning the optimum conditions for the extraction of the uranium and elimination of impurities."
- Factors Affecting the Precipitation of Uranium Peroxide
- Abstract: "This is a compilation of the data on uranium peroxide precipitations appearing in several reports. The solubility product is measured. The effect of many individual ions on the hydrogen peroxide decomposition rate and the complexing of uranium is demonstrated. Studies on plant and other highly contaminated solutions are not included."
- Flood-Prevention Projects at Pennsylvania Anthracite Mines: A Preliminary Study
- Report issued by the Bureau of Mines over flood-prevention methods at Pennsylvania anthracite mines. The flood-prevention projects are discussed. This report includes tables, maps, photographs, and illustrations.
- Fractionation of Fission Products and Heavy Elements by Volatilization Methods
- Technical report describing the attempt to separate the long lived fission product oxides by volatilization methods. A fractionization crucible was used. The fractionations give a fair idea of the relative volatilities of the longer lived fission products and also of the degrees of separation of the plutonium oxide or oxides from the fission products.
- Geochemistry of Beryllium
- From abstract: This is a review, with annotated bibliography, of the mode of occurrence of the element beryllium. It is not a list of specific ore deposits, but a summary of the types of the types of minerals and rocks in which beryllium has been reported to occur. In addition, the unpublished spectrographic studies of the Geological Survey on mill products are summarized, and data are given on domestic production and reserves and on foreign production.
- Geology and Ore Resources of the Uranium-Vanadium Depositional Province of the Colorado Plateau Region
- From introduction and acknowledgements: This report is written to supplement and complete the record contained in some fifty district and special reports already submitted, and duplication of material in district reports has been studiously avoided. The data herein contained are largely of a regional type, inclusion of which was not wholly appropriate to the district reports.
- 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."
- High Temperature Chlorination of Salvage Residues Recovery of Tuballoy from Trap Washes
- Abstract: "A method of recovering the tuballoy from the trap washes of the high temperature salvage chlorinator is described."
- High Temperature Refractories for Uranium
- Abstract: "Experiments are described wherein uranium metal was heated in ten different refractory materials under conditions approximating those of the uranium J. The refractory crucibles containing the uranium were placed in graphite crucibles and heated in vacuum for four hours at 1800-1850 C by means of an induction furnace. MgO, W, and TiH were found to be unacceptable containers for uranium at these temperatures. BeO, ThO2 and Un showed some reaction with the uranium, whereas UO2, ZrH, CeS, and ThS were only very slightly affected by the uranium during the runs."
- The History of the Atomic Bomb
- A brief history of the development of the atomic bomb in the United States and Germany during World War II.