# UNT Libraries - 301 Matching Results

# Search Results

- Measurement of Dielectric Constant and Dipole Moment of Liquids
- A study of procedures and techniques of measuring dielectric constant and dipole moment of liquids.
- A Positive Ion Source
- This paper describes the construction of a positive ion source of the electrodeless discharge type and may be divided into two main topis; (1) the radio frequency oscillator and power amplifier and associated power supply and (2) the ionization chamber.
- The Stereochemistry of Diphenylhexatriene
- The problem with which this paper is concerned has as its basis one of the most important properties of the conjugated system of double bonds found in some organic molecules, namely, the ability to exhibit stereoisomerism.
- Superconductivity
- This thesis is a study of the phenomenon of superconductivity.
- Absolute Beta Counting Using Thick Sources
- The problem with which we shall concern ourselves in this paper is the self-scattering and self-absorption of beta particles by the source.
- Dipole Moments of Diphenyl Compounds with Conjugated Double Bonds
- This thesis is a continuation of a study of molecular moments begun by Joseph T. Fielder. In his paper he discussed the theory and the equipment necessary for such a study. It is the purpose of this paper to set forth modifications of his equipment, to present data obtained with this modified equipment, and to interpret this data.
- A Reverberation Time Meter
- This thesis describes the construction of an apparatus to measure reverberation time.
- A Determination of the Bothe Depression Factor for Discs in Water
- The purpose of this work is to determine experimentally the depression of the neutron density by a detecting foil. The depression factor is known as the "self-shading" of the foil.
- A Continuously Sensitive Cloud Chamber
- A continuous cloud chamber would be a valuable asset to laboratory work in nuclear and atomic physics. For this reason the construction and investigation of a continuously sensitive diffusion cloud chamber has been undertaken. It is the purpose of this paper to report the design and operating characteristics of such a chamber.
- Crystalline Polymorphism of Nitrates
- The purpose of this study was to investigate the polymorphism of a group of related compounds. Special emphasis was placed upon the temperature at which transitions occurred and a possible correlation of these temperatures with other properties of the compounds.
- A Deuterium-Deuterium Type Neutron Source
- In view of the advantages of its type, the decision to construct a neutron source of the particle accelerator type was made. The purpose of this thesis is to survey the problems encountered in the construction of the source.
- Dipole Moments of Olefenic Diesters
- It is the purpose of this paper to present experimental data for the determination of the dielectric constant and the dipole moments for a series of olefenic diesters of the cis and trans configurations.
- Dipole Moments of Olefinic Esters
- It is the purpose of this thesis to investigate the applicability of the Debye equation to measurements dipole moments of polar compounds in dilute solutions of non-polar solvents more fully than has been done by previous workers at this institution.
- Potential Distribution of an Electrical Source-Sink Combination Along the Axis of an Infinite Cylinder
- In the present paper, an attempt is made to obtain the potential distribution in the case of two such charges, a source-sink combination, located on the axis of a bore hole drilled through an infinite, homogeneous medium.
- A Method for Calculating Foil Depression Factors
- As disc-shaped detectors are one of the primary means of measuring the neutron density, a better solution is desirable if the error due to the depression factor is to be made negligible. In this paper, an attempt is made to solve this problem in the oblate spheroidal co-ordinate system which most nearly describes the disc-shaped detector, so that solutions may be obtained that describe depression factors for detectors of varying thicknesses and radii.
- Design and Testing of a Positive Ion Accelerator and Necessary Vacuum System
- This thesis is a study of the design and testing of a positive ion accelerator and necessary vacuum system.
- Operation and Control of a Radiofrequency Ion Source
- This thesis examines the operation and control of a radiofrequency ion source.
- Variational Wave Function for Sodium
- The practical method of applying the variation principle to the calculation of the energy of an atom demands a trial function which contains variable parameters. The previous work done using this approach was based on the use of some combination of hydrogenic wave functions containing parameters inserted in appropriate places. The present calculation of the energy of the eleven-electron atom has been brought about using this method.
- Neutron Density Depression Due to an Oblate Spheroidal Detector
- In this paper, two projects have been undertaken. First, Workman's calculations have been checked to a higher degree of approximation to determine the accuracy of his method. Second, a new set of boundary conditions has been developed for obtaining solutions of the neutron diffusion equation which do not depend on the solution of the equation inside the detector.
- Foil Depression Factors for Disc-shaped Detectors
- The generalized data which are presented in this thesis are the culmination of the determination of the foil depression factor using oblate spheroidal coordinates.
- Analyzing Magnet System for the Electrostatic Accelerator
- This thesis describes the design and construction of a linear accelerator, specifically, a positive-ion source, a high voltage supply, an accelerating column, and the necessary associated vacuum system.
- A Two-Dimensional Model Study of Elastic Waves
- In seismic field operations complex problems often arise which cannot be solved mathematically. In recent years investigators in both the commercial and academic fields have begun to approach the problems of elastic wave propagation by the use of seismic scale models. This thesis discusses the results measured from simulated seismic activity on a scale model built by the researcher.
- The Angular Distribution and Total Flux of Neutrons Obtained from the Deuterium-Tritium Reaction
- Mono-energetic neutrons have been produced with the low-voltage Cockroft-Walton accelerator at North Texas State College using two different reactions. It is the purpose of this paper to report the angular distribution and total flux of the neutrons obtained from the T(D,n) reaction.
- The Angular Distribution of the Deuterium-Deuterium Neutrons with 100 Kev Deuterons
- It is the purpose of this paper to present the experimental techniques used in obtaining. 3.25 MeV neutrons from the H2(d,n)He3 reaction, as well as an analysis of the experimental data.
- Backscattering from Prolate Spheroids at Microwave Frequencies
- This thesis examines backscattering from prolate spheroids at microwave frequencies.
- Experimental Determination of the Scattering Cross-section of Ogives and Prolate Spheroids at Microwave Frequencies
- Because of the great difficulty of obtaining exact numerical values of cross-section, and because of the inherent uncertainties in interpreting and evaluating the approximate methods, accurate experimental cross-section data would be extremely useful to the radar engineer. It was with this purpose in mind that the present long-range research program in microwave scattering was undertaken. Of immediate interest were the scattering properties of the prolate spheroid, the ogive (formed by rotating the minor segment of a circle around the chord), and, for comparison, the long cylinder.
- Scattering Cross-sections of 4/1 Prolate Spheroids
- This is a report of the second in a projected series of experiments at North Texas State College designed for obtaining information about the microwave scattering properties of various shaped objects.
- An Investigation for Gamma Rays Resulting from the Bombardment of As75 with 14 Mev Neutrons
- It is the purpose of this paper to set forth the method and results of studying the gamma rays resulting from the bombardment of As75 with approximately 14 Mev neutrons. The source of these neutrons was the H3(d,n)He4 reaction. The deuterons of 325 Kev energy were obtained from a Van de Graff electrostatic accelerator. A NaI scintillation spectrometer was used to determine the gamma-ray energies.
- Radar Scattering Cross-section of Triangular Corner Reflectors
- The series of experimental studies to be described has been carried out in order to determine the feasibility of using corner reflectors as laboratory standards for model cross-section measurements.
- Design and Construction of a Positive Radio-Frequency Ion Source for the Production of Negative Ions
- It is the purpose of this paper to present a detailed account of the design and construction of this positive-ion source and associated equipment.
- Gamma Ray Response of a CsI(T1) Crystal to 14 Mev Neutrons
- The purpose of this paper is to study the possible excited states in the nucleus of Cs133. At North Texas State College a 100-Kev Cockcroft-Walton accelerator has been constructed for use as a neutron source for exciting various nuclei and for studying the gamma spectra obtained to determine their energy levels.
- Gamma Rays from Neutron Excitation of Cs133
- This thesis explores gamma rays from neutron excitation of Cs133.
- Magnetic Resonance of Protons in the Earth's Magnetic Field
- The purpose of the work reported here was to determine the feasibility of applying the nuclear induction technique of Bloch to the direct observation of nuclear magnetic resonance in the very weak magnetic field of the earth.
- Quaternion Representation of Crystal Point Groups
- The physical behavior of crystalline solids is very closely related to the internal symmetry of the crystal structure. For this reason it is desirable to represent mathematically this symmetry in such a way that the actual physical problems can be handled as they arise. In the case of this thesis the research has been guided by a list of desired properties for such a representation. No claim is made that the list is complete.
- A System for Measurement of Negative-Ion Charge-Exchange Cross Sections
- A radio-frequency positive-ion source and a fifty-kilovolt linear accelerator were designed and constructed in order to produce sizable quantities of hydrogen, helium, nitrogen, neon, and argon. Plans were then made to equip this ion source with charge-exchange apparatus suitable for charge-exchange cross-sectional measurements. It is the purpose of this paper to present the design of the equipment and to present operational knowledge of the equipment and of ion beams which are producible.
- Gamma Rays from CsÂ¹Â³Â³ by Inelastic Scattering of Neutrons
- The purpose of this investigation was to observe the excited states of the CsÂ¹Â³Â³ nucleus when neutrons are inelastically scattered from the nucleus.
- Stochastic Mechanical Systems
- To understand the phenomena associated with such stochastic processes and to predict, at least qualitatively, the behavior of mechanical systems within environments which are completely random in time, new mechanical tools are necessary. Fortunately, the derivation of these tools does not necessitate a complete departure from existing theories. In fact, they may be considered as an extension of the well-defined theory of the integral transform, in particular, the exponential Fourier integral transform.
- D-D and D-T Neutron Excitation of Energy Levels in Cs133
- The purpose of this experiment was to make positive assignment of the Cs133 energy levels excited by the inelastic scattering of neutrons.
- Design and Testing of a Coincidence System
- This paper is concerned with the design, testing and performance of a coincidence system, the proposed North Texas State College accelerator.
- Quaternion Representation of Crystal Space Groups
- This investigation is designed to find quaternion operators which will generate selected space groups and which are more convenient to manipulate in some important types of problems.
- Dynamical Friction Coefficients for Plasmas Exhibiting Non-Spherical Electron Velocity Distributions
- This investigation is designed to find the net rate of decrease in the component of velocity parallel to the original direction of motion of a proton moving through an electron gas exhibiting a non-spherical velocity distribution.
- Energy Losses of Protons Projected through a Plasma Due to Collisions with Electrons of the Plasma for a Variety of Non-Maxwellian Electron Velocity Distributions
- The purpose of this thesis is to study energy losses suffered by protons in traversing a plasma through collision with the electrons of the plasma. For these electrons a variety of non-Maxwellian velocity distributions are assumed.
- A Study of Emitter Drift in Transistors
- The purpose of this investigation was to determine the parameters of emitter drift and to suggest a mechanism for this phenomenon.
- Nuclear Magnetic Resonance in Hydrated Crystals - Potassium Oxalate Monohydrate
- The problem of this study was the measurement of the proton-proton separation in the water molecule of hydration in a single crystal of potassium oxalate monohydrate.
- Proton Nuclear Magnetic Resonance in Mica
- 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.
- Design and Testing of a Corona Column and a Closed Gas Distribution System for a Tandem Van de Graaff Voltage Generator
- The purpose of this study had been to design and test a corona column and an insulating gas distribution system for a small tandem Van de Graaff. The intent of this paper is to describe the gas handling system and to compare experimentally the effects of corona electrode shape on the corona current carried between adjacent sections of the column.
- Magnetic Susceptibility of a Crystalline Free Radical
- The entirety of the investigation discussed in this paper was confined to a study of the spin resonance properties of unpaired electrons of an organic free radical. In the remainder of the paper the theory of electron spin resonance, the apparatus used in the investigation, and the experimental results obtained are discussed in that order.
- Some Galvanomagnetic and Thermomagnetic Effects in a Single Crystal of Antimony
- The purpose of this investigation is to develop techniques of experimentation in the field of electron transport phenomena.
- A Vacuum Tube for an Electrostatic Accelerator
- The purpose of this study has been to design a prototype accelerating tube, to determine the correct point shape and spacing needed to produce corona current along the tube for the case of negative-point-to-positive-plane discharge, and to study the voltage-gradient characteristics of short sections of the tube when they were evacuated to a low internal pressure.
- Magnetically Driven Instabilities in Gas Discharges
- In the present experiment a gas discharge plasma generator was designed and constructed and a search was made for evidence of a plasma instability due to the influence of an externally applied magnetic field. The evidence for such an unstable mode of operation is too indirect to make a possible conclusion, but an approach to more certain identification will be indicated.