UNT Libraries Government Documents Department - 37 Matching Results
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- Photoexcitation in Superconductors
- Dissertation discussing the results of experiments to study the behavior of superconductors under light illumination.
- Sanitary Engineering Aspects of Long-Range Fallout from Nuclear Detonations
- From abstract: Results of a study of the sanitary engineering aspects of fallout from nuclear weapons are reported. Data were obtained from: a. Weekly surface water samples from 22 stations on streams and reservoirs in Eastern Massachusetts, collected from March, 1952 to July, 1953, and assayed for radioactivity. b. Weekly rain samples from March to July, 1953. c. Stream mud and soil samples collected before and after a large fallout. d. Results of fallout activity measurements by others based on samples from Massachusetts and the vicinity of Rochester, New York. Plots are presented showing the relations of the radiological data to the timing of detonations and the daily precipitation and showing daily deposition of activity and concentration in runoff. Runoff coefficients for fallout radioactivity are calculated.
- Relative Yields of Nitrogen-17 Produced by 190-Mev Deuteron Bombardment
- "Yields of N¹⁷ relative to that produced in LiF have been measured in the 190-Mev deflected deuteron and the 380-Mev alpha beams of the 184-inch synchrocyclotron. The measurements have been performed in all the light elements from 0 through V, with the exception of Sc and the noble gases. In addition, yields were measured in the separated isotopes of Mg...Comparisons are made with other types of yield studies performed with neutrons and protons, and the areas of agreement are noted."
- Interactions and Lifetimes of K Mesons
- The following report analyzes interactions of K+ and K- mesons and measures their lifetimes using a nuclear emulsion technique.
- Nuclear Decay Schemes of Some of the Isotopes of Tantalum (Master's Thesis)
- This report discusses a nuclear spectroscopic study of the radiations resulting from the electron capture decay of Ta-176, Ta-177, and Ta-178, analyzing data of nuclear decay schemes.
- Characteristics of a Lead-Glass Photon Spectrometer and its Use in Studying the Absorption of Photons and Antinucleons
- Thesis analyzing a lead-glass photon spectrometer and its use in studying the absorption of photons and antinucleons.
- Spectroscopy of High-Temperature Systems
- Report discussing a study aiming to find which electronic state of the C2 molecule is the groud state.
- The Method of Moments in Quantum Mechanics ; The [Pi]-Mesic Disintegration of the Deuteron
- The following report contains two reports to summarize a thesis: first, a report describing the classical moment techniques of Tchebycheff, Markov, and Stieltjes that have been applied to the problem of diagonalizing the Hamiltonian operator; and the second report describes an investigation of the higher-order corrections to the mesic disintegration of deuterons that is considered.
- Compton Scattering on Nucleons
- From introduction: "The present paper deals with a classical calculation in which some of the meson effects can be included to all orders in the meson-nucleon coupling coupling constant, in particular those having to do with the gyration of the nucleon spin and isotopic spin. Such a treatment leads to results qualitatively different from the weak coupling calculations."
- The Concept of Sets Enchained by a Stochastic Process and Its Use in Cascade Shower Theory
- From abstract: "In the present paper, the above methodology is investigated stochastic processes in general and it is shown how certain choices of sets can be made which preserve the linearity properties, though not necessarily the Markovian principles"
- Capacity Factors in the Performance of Perforated Plate Distillation Columns
- From abstract: "A study of factors affecting the vapor handling capacity of perforated plate liquid-vapor contacting columns. Vapor phase pressure drop across plates, liquid entrainment upward from plate to plate, and plate stability were investigated as functions of operational and geometric column parameters."
- Physical Studies of Cell Division: Statistical Fluctuations; Effects Due to X-Radiation, Temperature, and Hydrostatic Pressure
- Thesis discussing "a technique for determining the generation times of individual yeast cells...the effect of x-radiation on the generation times of individual cells and their progeny..." and "attempts to synchronize cell division in a population of cells."
- Electron Capture and the Auger Effect in the Heaviest Elements
- Thesis describing the Auger effect in the heaviest elements. The elements detailed in the report are ytterbium, polonium, and uranium. Measurements of K fluorescence yields and K Auger electron intensity ratios are given.
- The Masses of Identified Positive Heavy Mesons
- The following report describes the charged secondary particles from all presently known decay modes of positive K mesons that have been identified, and the masses of the primaries measured by the momentum-range method.
- Production of Neutral Photopions as a Function of Atomic Weight
- Thesis discussing the relative yield of neutral pions from elements in a reaction "as a function of the quantum-limit energy (the maximum energy of the quanta in the bremsstrahlung beam) of the Berkeley synchrotron." Interpretation of the results leads to values for the mean free path for absorption of the neutral pions in nuclear matter.
- Alpha-Decay Studies in the Heavy Element Region
- Thesis describing a research conducted to extend observations on nuclear energy levels and how they effect the nucleus itself, and an investigation on the gamma rays associated for the even-even isotopes and to obtain additional data for the oddmass neclei in the hope that more regularities will become apparent for that class of nuclides.
- Analysis of Bevatron Tau Mesons
- The following document analyzes one hundred and seventy-seven bevatron tau mesons for Q value of the tau decay, tau spin and parity, and possible polarization effects.
- Single-Particle States in a Spheroidal Nuclear Potential
- Thesis describing the the computation of eigenstates for a particle moving in a spheroidal potential well under the influence of a strong spin-orbit interaction.
- Analysis of the Interaction of 300-Mev Neutrons with Xenon
- Abstract: And investigation of the interactions between 300-Mev neutrons and xenon was made by means of a cloud chamber in a pulsed magnetic field of 21,700 gauss placed in the neutron beam of the 184-inch Berkeley cyclotron. Eighty-seven negative pion events and 257 other stars were analyzed. In addition an experimental check was made on the energy of the incoming neutrons. Classification, identification, and angular and energy distributions of prongs associated with all events are presented. Interpretations of results are given.
- Interactions of Negative K Mesons in Flight in Nuclear Emulsion
- The following report discusses a survey of seventy-seven interactions of K- mesons in flight in nuclear emulsion with seven decays in flight, and finding four inelastic scatterings.
- Range-Energy Relation for Liquid Hydrogen Bubble Chambers
- Thesis discussing the range-energy relation for the purpose of better understanding the kinematice of the formation, reactions, and decay of unstable strange particles within a liquid hydrogen bubble chamber.
- Nuclear Interactions of Antiprotons (Thesis)
- This report follows the studies on the interactions of antiproton with ordinary matter.
- Fission and Spallation Competition in Ra²²⁶, Th²³⁰, U²³⁵, and Np²³⁷
- This report follows the radiochemical study of fission and spallation products produced by bombardment of U-235 with 18- to 16-Mev helium ions and of the spallation products produced by 8- to 23-Mev deuteron bombardments of Np-237.
- Beta-Spectra of the Mirror Nuclei with A = 19 to 39
- Thesis presenting data taken on experimental nuclear magnetic moments for beta spectra of the mirror nuclei with A-19 to 39.
- The Reactions of Mixed Crystals of Rare Earth Fluorides With Fluorine Gas
- Thesis discussing the reactions of mixed crystals of rare earth fluorides with fluorine gas. The reactions were "studied gravimetrically by determining the weight increases of mixed tetrafluoride samples upon exposure to fluorine at a pressure of 1 atmosphere and a temperature of 250°C...The nature of the phases produced upon fluorination was studied by x-ray diffraction methods."
- Bonding and Spectra of Metal Chelates: Ultraviolet, Visible, Infrared, and Electron Resonance Absorption ; Near Infrared Spectra of Alchols
- From abstract: "Optical spectra of six beta-diketones and their cupric chelates are presented and discussed in relation to the structures of the molecules."
- Small-Angle Neutron-Proton Scattering at 90 and 290 Mev
- From abstract: "The relative differential neutron-proton scattering cross section has been measured in the range of center-of-mass angles from 5.1° to 36.0° for approximately 90-Mev neutrons and from 10.7° to 37.8° for approximately 290-Mev neutrons."
- Neutron-Deficient Isotopes in the Noble Metal Region; Conversion Electron Spectra of Some Heavy Elements
- From abstract: "A radiochemical study of some neutron-deficient nuclides in the noble metal region has been undertaken, and several new chains identified."
- Angular Distributions of Charged Particles From 31-Mev Protons on Carbon
- Report describing the angular distributions of several groups of charged particles resulting from the bombardment of carbon with 31-Mev protons.
- Method for the Routine Absolute Intensity and Energy Measurements of Beta Radiation; Application to Naturally Radioactive Potassium, Rubidium, Rhenium and Lutetium
- Photocopy of a dissertation discussing natural radioactivities and half life of potassium, Rubidium, Rhenium, and Lutetium.
- On the Three-Dimensional Instability of Laminar Boundary Layers on Concave Walls
- Memorandum presenting a study of the stability of laminar boundary layer profiles on slightly curved walls relative to small disturbances, in the shape of vortices, whose axes are parallel to the principal direction of flow. The result in an eigenvalue problem by which, for a given undisturbed flow at a prescribed wall, the amplification or decay is computed for each Reynolds number and each vortex thickness.
- Preparation of Metallic Titanium by Film Boiling
- From abstract: The Van Arkel-deBoer method for producing ductile titanium by thermal decomposition of TiI4 vapor and deposition on an electrically heated filament is modified by film boiling TiI4 liquid on a heated filament, resulting in similar titanium deposition on the filament and liberation of iodine to the gaseous phase."
- Nuclear Internal Momentum Distributions
- The following report measures and analyzes the nuclear internal momentum distributions of protons in light nuclei with the 340-Mev scattered proton beam from the synchocyclotron.
- Thermodynamics of the Aqueous Ions of Americium
- Thesis discussing the heats of reduction, oxidation potentials, and measurements of autoreduction and disproportionation for aqueous ions of americium.
- Some Chemical Properties of Curium
- Report discussing details of curium's chemical properties, including gamma radiation, solubility, and absorption. A procedure for separating curium from americium and the preparation of terbium tetrafluoride, which lead to its discovery, is also included.
- Design and Properties of a Neon Filled Spark Chamber in a Magnetic Field
- Introduction: Recently a new type of charged particle detector, the so-called spark chamber, has been developed. The detector has certain advantages in high energy physics over bubble chambers aside from its much lower cost.
- Proton Beam Current Measurement in the Low K.E.V. Range
- Secondary charge effects from a 10 kilovolt proton beam and their effect upon beam current measurement are investigated. A collector is designed for beam current metering of a 60 kilovolt proton beam by means of charge measurement and energy measurement.