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Analytic Approach for the Pion-Proton Scattering Phase Shifts

Description: A simple method of solving for the phase shifts of the pion-proton scattering is presented. The rapid solution afforded can be utilized, as the Ashkin diagrams have been employed, to give starting values to an electronic computer or alternatively to analyze with more ease the variation of the phase shifts as a function of the input data in terms of the coefficients of the angular distributions. A new plot of a function of the total cross section versus the pion energy is introduced. The nearly … more
Date: December 7, 1955
Creator: Rarita, William, 1907-
Item Type: Refine your search to only Report
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Angular Distribution of Fragments from the Photofission of U238

Description: Ilford D1 and Eastman NTC nuclear emulsions have been loaded with a solution of uranium acetate and them exposed to the X-ray beam of the Case betatron operated at 18 Mev. The developed plates have been searched wit a Zeiss type microscope. A total number of 1062 fission tracks have been measured and analyzed and the angular distribution of the fission fragments in center of mas system has been obtained.
Date: 1955
Creator: Reineke, Z. L.; Finegan, J. D. & Shankland, Robert S., 1908-
Item Type: Refine your search to only Report
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Automatic Thermogravimetric Analysis in Ceramics

Description: Ceramic investigators often find it desirable to know the weight of reactants either immediately after a given heating period or while the specimen is still at the elevated reacting temperature. The conventional gravimetric methods render either of these goals difficult if not actually impossible. Specimens often gain weight through adsorption of water or other reactions upon cooling to room temperature. Desiccators are employed but are not completely satisfactory. Repeated heating and weighing… more
Date: 1955
Creator: Hyatt, Edmond P. (Edmond Preston), 1923-; Cutler, Ivan B., 1924-; Fassell, W. Martin, Jr. & Wadsworth, Milton E.
Item Type: Refine your search to only Report
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Beta Gage for Localized Measurements on Thin Films

Description: A gage employing a narrow "pencil" of beta-rays has been developed to determine the thickness of films used a cyclotron targets. The instrument, pictured in Figure 1, allows an estimate of the evenness of films a few mg/cm thick by reproducibly scanning the sample with a collimated beta-ray beam 3/32 in. in diameter.
Date: 1955
Creator: Anders, Oswald U. (Oswald Ulrich) & Meinke, W. Wayne
Item Type: Refine your search to only Report
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Carcinogenesis by Radioactive Substances

Description: Knowledge of the potential dangers of exposure to radioactive substances and the institution of proper safety precautions have helped to reduce accidental exposures to radioactive substances. In the following technical report we shall review briefly carcinogenesis in man by naturally occurring and artificially produced radioactive substances, the lung cancer problem in miners, the development of bone tumors in luminous dial painters and in patients treated with radium-containing nostrums, and t… more
Date: 1955
Creator: Furth, Jacob & Tullis, John L.
Item Type: Refine your search to only Report
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A Cloud Chamber Study of the Secondary Particles from Locally Produced Penetrating Showers

Description: The present experiment was undertaken as an attempt to throw more light on the decay processes that had been observed prior to the summer of 1952, as well as to investigate any new decay processes that might manifest themselves. The source of high energy primary particles was to be the cosmic ray beam, so a detector of locally produced high energy penetration showers was used. In order to be able to detect effectively low energy photons and low energy secondaries from particles reaching the end… more
Date: September 1955
Creator: Harmon, Norman Frederick
Item Type: Refine your search to only Report
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Datatron digital Computer Program for least-Squares Analysis of Variance

Description: A digital computer program for calculating least-squares solutions and making analyses of variance of sets of overdetermined linear equations is described. The entire code is reproduced with sufficient description of the program to enable anyone familiar with the Electrodata Datatron Computer to use it for similar problems.
Date: July 1955
Creator: Rollett, J. S. (John Sidney)
Item Type: Refine your search to only Report
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Decay Scheme of In107

Description: The gamma radiations of In107 have been investigated with a scintillation spectrometer . The In107 was produced in a cyclotron by a (d,n) reaction on electromagnetically enriched Cd106. Beta-gamma and y-y coincidence experiments showed in addition to the annihilation radiation, only one y ray of 0.22 Mev associated with the 2.2 Mev positron.
Date: 1955
Creator: Cassatt, Wayne A., 1925- & Meinke, W. Wayne
Item Type: Refine your search to only Report
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The Decomposition of Solid Barium Nitrate by Gamma Rays

Description: There was considerable disagreement between results obtained by early investigators who studied the interaction of ionizing radiations with solid nitrates. It was thought worthwhile, therefore, to extend their work and to make certain that reproducible results were being obtained. It was expected that the nitrite ion and oxygen would be found in equivalent amounts in the irradiated samples. Four measurements of nitrite ion and oxygen indicate that the decomposition of barium nitrate by gamma r… more
Date: 1955
Creator: LeMar, Lawrence E.
Item Type: Refine your search to only Report
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Detection of Airborne Beryllium Dust : Monthly Report Covering the Period from May1 to June 1, 1955

Description: During this period a prototype gamma ray detection system was assembled and data was obtained on samples of beryllium salts on filter paper under a variety of conditions. Ordinarily either a scaler-register combination or the CRM-recorder combination would be sufficient for obtaining data. Both units have been used here in order to utilize the particular advantages of each system. The scaler-register unit was employed for obtaining precise data over short intervals while the CRM-recorder was us… more
Date: June 14, 1955
Creator: McCarty, R. G.
Item Type: Refine your search to only Report
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A Discussion on the Layout of Elements of a Control Panel

Description: This memorandum is an outline of the principles and methods employed by 5100 Human Engineering Personnel in consultation on test equipment panel layout. The process of control panel layout is partially formalized with particular emphasis on test equipment panels. An experimental method is proposed for selecting an optimum panel layout. The essential role of experimentation is pointed out. The optimal layout for a nonrepetitive procedure is deduced and generalized to give methods of layout solut… more
Date: August 1, 1955
Creator: Beeler, J. R.
Item Type: Refine your search to only Report
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The Effect of Crystallite Size on the Bulk Density and Strength Properties of Uranium Dioxide Specimens

Description: Fused uranium dioxide was separated into fractions of varying particle size by air separation. Specimens of the nominal size of 1/8 by 1/4 by 1½ in. were formed by hydrostatic pressing, firing, and lapping. Specimens prepared from the 0 to 5 μ fraction were the strongest and most dense. The room-temperature density was about 92% of theoretical and the room-temperature flexural strength was about 12,000 1b. per sq. in. When tested at 1000°C., the strength was about 18,000 1b. per sq. in. The fle… more
Date: June 1, 1955
Creator: Burdick, Milton D. & Parker, H. S.
Item Type: Refine your search to only Report
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Effects of Ultraviolet Radiation on Chloroplast Reactions and Plant Metabolism

Description: This technical report represents a brief survey of work by this project on the effects of ultraviolet radiation (UV) on certain of the photochemical and metabolic properties of rhubarb chard and sugar beet (Beta vulgaris). These plants were selected for this work because for some years they have been used as sources of chloroplasts for Hill reaction studies in this laboratory. Some of this work has appeared as a brief paper.
Date: June 15, 1955
Creator: Anderson, Donald R.; Spikes, John D. & Mayne, Berger C.
Item Type: Refine your search to only Report
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Effects of X-Irradiation on the Plasmas of Chickens as Revealed by Serological Analysis. Part I, Whole Plasma Comparisons. Part II, Alteration of Proteins of the Liver (a Preliminary Report). Part III, Autoantibody Formation (a Preliminary Report)

Description: Irradiation of a living animal with X-rays induces alternation in the proteins of cells in which ionization events occur. Systematic end-products such as the proteins of plasma would, by changes in quality and quantity divulge modification of their synthetic pathways, or compensatory responses of the hematopoietic systems to stresses caused by irradiation in other organs. Serological identification of proteins, a sensitive means of biochemical characterizations was chosen to reveal variations i… more
Date: 1955
Creator: Leone, Charles A.
Item Type: Refine your search to only Report
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Equation of State of Water

Description: A generalization of the Fermi-Thomas model for application of mixtures. This study attempts to determine the equation of state of water up to pressure of 10,000 megabars and temperatures of several thousand electron-volts.
Date: May 23, 1955
Creator: Latter, Albert L. & Latter, Richard
Item Type: Refine your search to only Report
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The Equation of State of Water on the Thomas-Fermi Model

Description: Two methods are described for extending the Thomas-Fermi model of a compressed atom to molecules or mixtures of the type Z Zn. The methods are applied to H2O at zero temperature to determine pressure and internal energy as functions of the density, the position of the protons relative to the oxygen nucleus, and the electrostatic potential distribution within the molecule.
Date: October 24, 1955
Creator: Latter, A. & Latter, R.
Item Type: Refine your search to only Report
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The Equation of the Fusion Curve

Description: A generalization of the Lindemann law is used in connection with the Murnaghan equation of state for a solid to derive theoretically the empirical Simon equation for the fusion curve. For the alkali metals it is shown that experimental values of the temperature exponent in the Simon equation are quantitatively compatible with the theoretical evaluation given, and, furthermore, that the theory can predict approximate values of the experiment, in practice.
Date: May 24, 1955
Creator: Gilvarry, J. J. (John James), 1917-
Item Type: Refine your search to only Report
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Equipment and Preliminary Results for the Leaching of UO2 in a Basic Carbonate Circuit

Description: Equipment has been designed and constructed for the purpose of leaching pure uranium minerals in both acidic and basic circuits. This equipment provides a means for removal of a series of samples during any one run, control over speed of agitation, indication of gas over pressure, and automatic temperature control. These units may be operated up to 1500 p.s.i. Solid UO2 samples were prepared by sintering under hydrogen to 1800 degree C. Preliminary results of the leaching of sintered UO2 in a b… more
Date: May 1955
Creator: Pearson, Ray L.; Mackay, Theron L.; Wadsworth, Milton E. & Fassell, W. Martin, Jr.
Item Type: Refine your search to only Report
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Flotation Characteristics of Florida Phosphate Leached-Zone Material, Progress Report No . 7

Description: Although the results reported herein are rather encouraging and show the possibilities of utilizing flotation to increase recoveries and in some instances grades, they should not not be considered an optimum. As stated previously, time did not permit a detailed investigation of all reagents an conditions to obtain maximum grades and recoveries, but sufficient data, with enough typical samples, have been obtained to indicate a definite trend and encouragement for further studies. A comparison of… more
Date: December 20, 1955
Creator: Snow, Robert E. (Robert Ellis)
Item Type: Refine your search to only Report
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Frequency Components of a Step Function and a Sinusoid

Description: Fourier analyses are made on two functions. The first is a step function forward from periodic samples of a sinusoid. If the frequency of the sinusoid is less than one-half of the sampling frequency, it is shown that the step function has no frequency components less than one-half of the sampling frequency other than that of phase, and duration with respect to the interval of the analysis. It is shown that the insertion of a blank space in the period of analysis reduces greatly the uncertainty … more
Date: May 10, 1955
Creator: McGehee, R. M.
Item Type: Refine your search to only Report
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Fundamental Research in Nuclear Spectroscopy and X-Rays. Annual Report No. 1 for Period October 1, 1954 to September 30, 1955 on Research in Precision Spectroscopy of Nuclear Energy Levels

Description: The primary purpose of this contract is to develop and exploit techniques for the precision measurement of nuclear energy levels by the spectroscopic study of gamma-rays emitted during the decay of radioisotopes, (1) by the use of a high resolving power curved crystal focusing spectrometer to study wavelengths and intensities of gamma-rays themselves, (2) by means of a precision beta-ray spectrometer to study the conversion lines from gamma-rays both by internal conversion and with external con… more
Date: June 1955
Creator: DuMond, Jesse W. M. (Jesse William Monroe), 1892-1976
Item Type: Refine your search to only Report
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