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A Study of the Kinetic and Mechanical Properties of a Stabilized Beta Phase Plutonium Alloy

Description: The elements Sn, Mg, Ti, Zr, Hf, Si, Cd, and U were alloyed with plutonium to determine their effect on stabilization of the beta phase. Zirconium was found to be the ' most effective. Kinetic studies were conducted on Pu-Zr alloys having 0.24, 0.65, and 1.7 at.% Zr contents. The beta to alpha transformation in the Pu-Zr alloys was somewhat similar to that in unalloyed plutonium. The main difference being that time, temperature, transformation curves of the alloys were shifted to the right as the zirconium concentration increased. It was determined that the amount of beta phase retained at room temperature increased as the zirconium concentration increased. The minimum amount of Zr needed to stabilize the beta phase of plutonium at room temperature was determined to be 2.0 at.%. A 2.4 at.% Zr addition stabilized the beta phase of plutonium at atmospheric pressure from room temperature to 265 deg C. During mechanical property testing it was determined that the stabilized beta Pu-2.4 at.% Zr alloy was brittle from room temperature to 230 deg C. Both tensile and compression strengths of the beta stabilized alloy were greater than the unalloyed beta phase of plutonium. A brittle-ductile transition was noted between 130 and 180 deg C on the Pu-0.65 at.% Zr alloy. Age hardening studies were conducted at room temperature with a Pu -2.4 at.% Zr alloy. A slight aging effect was noted due to the precipitation of an intermetallic compound. Compression tests on the Pu-2.4 at.% Zr alloy indicated that below 80 deg C the stabilized beta phase started to transform to alpha phase during the application of compressive loads. (auth)
Date: January 1, 1962
Creator: Taylor, J. M.
Partner: UNT Libraries Government Documents Department
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Low Temperature Thermoluminescence of Gamma Irradiated Potassium Dihydrogen Phosphate

Description: Thermoluminescence in potassium dihydrogen phosphate (KDP) induced by Co/ sup 60/ gamma irradiation at liquid nitrogen temperature (-198 deg C) was investigated. Glow curves in the temperature range --196 to 0 deg C were measured for a series of gamma exposure dosages ranging from 10/sup 4/ roentgen to 5 x 10/sup 6/ roentgen. The heating rate used for glow curve measurements was 12 deg C per minute. Twice recrystallized Mallinckrodt reagent grade potassium dihydrogen phosphate, with a grain size between 100 and 170 mesh, was used for most samples. In the case of the powder samples, the glow curve for an exposure dose of 10/sup 4/ roentgen exhibited two peaks in this temperature range, one at approximately --78 deg C and the other at approximately -146 deg C. The -78 deg C peak split into two distinct peaks with increasing dosage. At still higher doses an additional peak at about -9 deg C became evident. This peak may, however, be due to aluminum oxide. Calculation of the trap depth, E, and the frequency factor, s, associated with the --78 deg C peak, by the approximate method of Grossweiner yielded values of 0.485 ev and 9.97 x 10/sup 10/ sec/sup -1/ for E and s, respectively. Calculation of the trap depth corresponding to this glow peak was also made using the method described by Bonfiglioli, Brovetto, and Cortese. The value obtained was approximates -0.2 ev. Treatment of the --148 deg C glow peak by the method of Bonfiglioli, Brovetto, and Cortese gave values of approximates 0.1, approximates 0.35, and approximates 0.2 ev for glow curves resulting from exposure doses of 10/sup 4/, 10/sup 5/, and 10/sup 6/ roentgens, respectively. Glow curves were measured for two KDP single crystals, each exposed to 10/sup 4/, 10/sup 5/, and 10/sup 6/ roentgens with subsequent …
Date: October 19, 1962
Creator: Sims, T. M.
Partner: UNT Libraries Government Documents Department
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The Specific Heat of Dysprosium Metal Between 0.4 and 4 K

Description: Submitted to Illinois Inst. of Tech., Chicago. A He/sup 3/ cryostat was built to measure the specific heat of rare earth metals which have a component, at low temperatures, attributable to the electrons in the incomplete 4f shell. The specific heat of dysprosium from 0.4 to 4.2 deg K was measured. Pertinent theories about specific heats are outlined. The apparatus included the cryostat, vacuum and He/sup 3/ systems, calorimeter, carbon thermometer, heater, and magnetic thermometer. The experimental procedure is described and results are presented in graphic and tabular form. The specific heat rose sharply below 1 deg K. An anomalous hump was centered about 2.35 deg K. (M.C.G.)
Date: August 1, 1962
Creator: Guenther, R. A.
Partner: UNT Libraries Government Documents Department
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Kinetic Studies of the Reactions Occurring Between Tungsten and Gases at Low Pressure and High Temperatures

Description: Oxygen, nitrogen, and nitric oxide gases were passed through a system consisting of a tungsten filament, an ion gauge, and a mass spectrometer. The ion gauge recorded total pressures and the spectrometer recorded partlal pressures of O/sub 2/, N/sub 2/, NO, CO, COa, and H/sub 2/O. From the way these pressures changed with filamert temperature, the rates of conversion of O/sub 2/ to volatile tungsten oxides and O, and of NO to volatile tungsten oxides N/sub 2/ , O/sub 2/, and O were computed. The time rate of resistance change in the filament was used to compute the rate of conversion of tungsten to tungsten oxides. The filament temperatures ranged from 1950 through 2600 deg K and gas pressures ranged from 10/sup -8/ to 10/sup -6/ atm. For the tungsten-oxygen reaction, the rates of tungsten and oxygen loss were found to depend upon oxygen atom concentration on the surface. The rate of oxide power, depending upon the concentration of oxygen atoms on the surface. The reaction rate at constant oxygen pressure decreases with increasing temperature. For calculational purposes, the tungsten oxygen gas moleeules were assumed to be WO/sub 3/ only, though WO/sub 2/ and WO are other possible products. The apparent activation energy for the formation of WO/sub 3/ decreases from 14to -20 kcal./mole as the concentratlon of oxygen atoms decreases, because of the competing processes of oxygen molecule desorption from the surface. The rate of reaction of nitrogen with tungsten was found to be less than could be measured under the conditions of this study. The rate of decomposition of nitric oxide was found to depend upon the number of adsorption sites available on the surface, and the rate is controlled by the adsorption of a molecule on a site. The over-all rate decreased with increasing pressure and had …
Date: April 1, 1962
Creator: Anderson, H. U.
Partner: UNT Libraries Government Documents Department
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The Moderation of Neutrons in Non-Multiplying Infinite Homogeneous Media.

Description: Submitted to Univ. of Minnesota, Minneapolis. The gas model of neutron thermalization for a general moderator mass was studied by formulating the thermalization process as an integral equation. The relation of the model to the slowing-down theory was investigated. A discussion of the theory of scattering cross sections for neutrons is presented. The Wigner-Wilkins model was considered for moderator atoms of the same mass as the neutron. The analysis was extended to the case of a gaseous moderator with atoms of general mass. (M.C.G.)
Date: January 1, 1962
Creator: Min, K.
Partner: UNT Libraries Government Documents Department
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The Angular Distribution of Fission Fragments From the Fast Neutron-Induced Fission of U-234

Description: Submitted to Univ. of Tennessee, Knoxville. The fast neutron-induced fission cross section of U/sup 234/ was measured from threshold to 4-Mev neutron energy. A maximum of 1.26 barns was found at 850 kev followed by a minimum of 1.10 barns at 8050 kev. The angular ani-sotropy of the fragment distribution was measured for neutron energies from 400 kev to 4 Mev. Extrema in the ratio sigma /sub f//( sigma /sub f(90 deg ) were found at 500, 850, and 1050 kev; the distribution at 500 kev showing a maximum in the direction normal to the beam (side-wise peaking) while that at 850 kev showed a maximum along the beam direction. The distribution at 8050 kev showed forward peaking but to a lesser extent than for energies immediately higher or lower. The behavior was analyzed according to the theories of Bohr and Wheeler. The dip in cross section between 850 and 1050 kev is consistent with the suggestion of Wheeler that neutron competition in the decay of the compound nucleus enters with increased strength in this area. Vibration-rotational levels in U/sup 234/ beginning at 790 kev are known to exist and inelastic neutron scattering to these levels serves to depress the fission cross section. The changes in fragment angular distribution are shown to be explainable in terms of the theory of Bohr which states that fission occurs through distinct channels composed of a K-band structure analogous to that observed at low excitations in heavy deformed nuclei. More detailed angular distribution measurements were carried out at 850 and 1050 kev. The overall picture is consistent with a K-band structure in U/sup 235/* near the saddle point deformation of K equals 1/2+, 3/2--, 1/2-- in that order, the bands being separated from each other by a few hundred kilovolts. (auth)
Date: August 27, 1962
Creator: Lamphere, R. W.
Partner: UNT Libraries Government Documents Department
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The Theology of Charles Williams

Description: Since the publication of Charles Williams' novels, first in England and more recently in the United States, comment has varied between the extremes of "major" and "intolerable." It is desired to confine this study to the seven novels.
Date: August 1962
Creator: Hendry, Robert J.
Partner: UNT Libraries
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Relationships of Sociometric Inconsistencies with Negativism in a Child Care Institution

Description: Since there has been an abundance of research concerning high and low social status and little on inconsistents, the present study intends to shed some understanding of this group by comparing their feelings and attitudes to the highs and lows. Four principle areas are emphasized: family relationships, attitude toward sex, interpersonal relationships and self concept, with sub-areas lending added data.
Date: August 1962
Creator: Hutton, Jerry B.
Partner: UNT Libraries
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Administrative and Judicial Evolution of the Occupational Disease Concept in Workmen's Compensation Legislation

Description: The purpose of this study is to examine the theory of workmen's compensation, tracing its historical development and showing how the law evolved in the United States. Pertinent statutes and administrative and judicial decisions will be given to the evolution of the theory of compensable occupational diseases. Following an analysis of the occupational disease concept and the significance of this concept in modifying the basic theory, an effort will be made to evaluate the effect of this concept upon the meaning of the laws.
Date: August 1962
Creator: Hyde, Peter D.
Partner: UNT Libraries
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Proton Nuclear Magnetic Resonance in Mica

Description: The experiments to be described here were undertaken for the purpose of determining, if possible, by NMR techniques whether or not the hydroxyl protons in mica are bound in a regular crystalline array, and, if so, whether or not the hydroxyl protons occur in reasonably isolated pairs as in waters of hydration.
Date: May 1962
Creator: Townsend, Don H.
Partner: UNT Libraries
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Assimilation of Inorganic Nitrogen by Aquatic Actinomycetes

Description: It was the purpose of this investigation to present laboratory data concerning the assimilation of inorganic nitrogen by the aquatic actinomycetes. The strains of aquatic actinomycetes under consideration represented a cross section of those currently under culture at North Texas State University.
Date: August 1962
Creator: Davis, Ernst M.
Partner: UNT Libraries
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Infrared Studies of Anions of Organic Acids

Description: The present work is a part of a systematic investigation of the frequency shifts in infrared absorption produced by changing to the anions carbonyl containing acidic compounds.
Date: August 1962
Creator: Dyke, Maurice Arthur
Partner: UNT Libraries
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The Effect of Federal Labor Legislation on Organizing Southern Labor During the New Deal Period

Description: With the aid of the labor legislation passed during the New Deal era, it would appear that southern labor should have been as well organized proportionately as northern labor. Outwardly it would also appear that southern labor did not enjoy more success in organization because it was still docile and preferred to bargain on an individual basis, an attitude which met with the approval of the southern employer. However, the attitude of the individual southern worker does not explain what occurred in the South under the New Deal. Rather, other important factors retarded unionization: southern community attitudes, regional hostility to anything northern, southern courts, the national aspect of the New Deal and the various unions themselves. To understand the slow but continuous process of unionization in the South during the New Deal period, these factors have to be considered in their setting. Only here can the effect of the New Deal labor legislation be readily discernible.
Date: August 1962
Creator: Forsythe, James Lee
Partner: UNT Libraries
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Some Effects of X-irradiation on the Plasma Corticosterone, Adrenal Weights, and Differential Leukocyte Count in the Rat

Description: The purpose of the present study was twofold: (1) to determine if X-irradiation can be considered a direct stress agent, and if so, to what extent it differs from other stressors; and (2) to further elucidate the role of the adrenal cortex in the radiation syndrome by determining the more immediate responses of this system to X-irradiation.
Date: August 1962
Creator: Gaugl, John F.
Partner: UNT Libraries
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A Study of The Mirror

Description: Because of the lack of authoritative secondary material on the Mirror, the need for deeper study into the content of the Mirror appears necessary. In order to fill this need, this study has been undertaken to provide basic information about the Mirror's subject matter and the attitudes of its contributors.
Date: August 1962
Creator: Heaberlin, Dick M.
Partner: UNT Libraries
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An Appraisal of Structures and Point of View in the Novels of William Styron

Description: This paper, then, purposes to examine these two characteristics of Styron's novel form--structure and point of view--as they are handled in his major works, the novels Lie Down in Darkness and Set This House on Fire, and the novella The Long March.
Date: June 1962
Creator: Merril, Charles S.
Partner: UNT Libraries
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Intermediates for Paracyclophane Synthesis

Description: It is proposed in this thesis that the imperfect systems of Cram and of Schubert be combined with some modifications.
Date: August 1962
Creator: Lin, Ying-tsung
Partner: UNT Libraries
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