Physical Sciences and Mathematics Commons^™

The Leakage Neutron Spectrum Of A Spherical Critical Assembly Of U233, Larry E. Bobisud

Physics & Astronomy ETDs

In this paper the spectrum of the neutrons escaping from a critical sphere of U²³³ is investigated experimentally and theoretically. The experimental investigation involved exposing a nuclear emulsion to the neutron flux and, after development, examining the details of the proton-recoil tracks visible in the emulsion.

On The Velocity Of Sound In Cubic Crystals, Stuart Fleming Hayes

Physics & Astronomy ETDs

The object of this inquiry is to examine the relation between plane wave sound velocities in cubic crystals and the elastic constants of such crystals. Leading directly into this an extensive treatment of the classical theory of elasticity as it pertains to the cubic system. An application of the results will be made by detailing a means for obtaining the elastic constants of plastic single-crystals from measurements of velocity made on poly crystalline specimens.

Mineralogy Of Rose Muscovite And Lepidolite From The Harding Pegmatite, Taos County, New Mexico, Durga Nath Rimal

Earth and Planetary Sciences ETDs

The main purpose of the present work is to obtain quantitative data on alkali metals present in rose musco­vite and lepidolite of the Harding pegmatite and to try to correlate them with the present knowledge of the geology of this pegmatite body.

Geology Of The Sedillo-Cedro Canyon Area, Bernallio County, New Mexico, Bert Norman Brown

Earth and Planetary Sciences ETDs

This report was undertaken primarily as a study of Pennsylvanian strata which crop out in the Sedillo-Cedro Canyon area. The subdivision of the Madera formation as proposed by Read and others (1944) was adopted for purposes of mapping. This subdivision is based on a dominance of either limestone or clastic rocks in the formation.

The writer was unable to measure a Pennsylvanian section in the field due to thickness changes, facies gradations, and faults which were often concealed by dense soil cover. However, by visually traversing the area on aerial photographs using arbitrarily chosen zones, estimated thicknesses for the members …

The Analysis Of Seed Oils Of Six Tropical Plant Species By Gas Chromatography, Justin C. Hamer

Chemistry and Chemical Biology ETDs

Several factors influenced the choice of tropical plant seeds studied in this research. Among these factors were: (1) an early interest in the chemistry of natural products; (2) the legends surrounding the use of certain plants by native herb "doctors," and (3) the ready availability of the materials at the beginning of this investigation, which was started in Cuba.

The Time Required For Nuclear Fission, William Earn Stein

Physics & Astronomy ETDs

The present work is concerned with the mean lifetime of compound nuclei formed in the fast-neutron-induced-fission process. A new method for the measurement of these lifetimes is proposed. The present method is based on the recoil of the compound nucleus following neutron capture and the secondary electrons emitted by fission fragments. Previous experimental and theoretical work concerning the secondary electron yields for fission fragments and other charged particles are reviewed. The importance of the higher energy electrons, the so-called delta rays, formed in the primary ionization process is considered. The subsequent secondary ionization produced by these delta rays provirles a …

The Energy Spectrum Of Gamma Rays Produced In Interstellar Matter By The Primary Cosmic Rays, Duquesne A. Wolf

Physics & Astronomy ETDs

With the advent of the launching of space exploration in the last decade there has been parallel scientific effort to determine the nature of cosmic radiation found in space.

This theoretical study has the objective of determining the energy spectrum of gamma rays produced in interstellar matter by the primary cosmic rays.

Investigation Of The Energy Levels Of He^6, Roy A. Olson

Physics & Astronomy ETDs

At Los Alamos, one of the Van de Graaff acceleration is used to accelerate tritons up 2.5 Mev in energy. Using the machine and bombarding a lithium target, one can study the Li⁷ (T, ∞) He⁶ reaction. Observing the energy of the ∞-particles from this reaction, once can determine energy levels of He⁶ .

A board-range spectrograph employing a 30-inch nuclear-track plate has been constructed an employed in the conjunction with the Van de Graaff. The construction and operation of the spectrograph are described.

Preliminary results from scanning and exposed nuclear plates gives evidence for the ground …

The Determination Of Thermal Neutron Density From The Absolute Measurement Of The Activity Induced In Gold Foils, Munson M. Thorpe

Physics & Astronomy ETDs

The interaction of thermal neutrons with a coin shaped detector is discussed in terms of the reaction rate in an infinite sheet of pure absorber irradiated in a void by an isotropic, Maxwell distribution of thermal neutrons. A coincidence method for the evaluation of the decay rate of the neutron induced activity in gold is examined in detail and utilized to measure the relative specific activity of gold foils exposed to neutrons in the graphite thermal column of the Water Boiler Reactor. The relative specific activity was obtained for 3/4" and 1/4" diameter foils as a function of thickness for …

The He3 + T Reactions., Darryl B. Smith

Physics & Astronomy ETDs

The energy distribution of the alpha particles and of protons frim the He3+ t reactions have been measured for 1.9-Mev incident tritons at laboratory angles of 30° for alpha, and both 30° and 90° for protons. Absolute cross selections are obtained. The spectra are discussed in terms of a model which assumes that uncorrelated three-body breakup and several two-stage processes all contribute independently to the cross section. The calculations based on this model are in excellent agreement with the observed spectral shapes. The neutron-proton correlation corresponding to the unbound singlet state of the deuteron is observed. The binding energy of …

Multiple Scattering Of High Energy Electrons In A Cerenkov Counter, John Rehnberg

Physics & Astronomy ETDs

The purpose of this thesis is to present a procedure for calculating the fraction of high energy electrons incident on a Cerenkov counter which are scattered out of the region of detection.

With the assistance of Professor Christopher P. Leavitt of the University of New Mexico, a method of solving the above problem has been established. The method uses the theory of multiple scattering as described by Rossi and Greisen and a numerical integration technique to evaluate the effective or average scattering distribution function for the Cerenkov counter. A relationship is developed which can be programmed on a Bendix G-15 …

Calibration Of A Liquid Scintillator With Geiger-Mueller Counters, William F. Hartman

Physics & Astronomy ETDs

It was the purpose of this experiment to examine the difference in the density determinations and, since the Geiger tube threshold is much lower, to calibrate the liquid scintillator so that it is capable to determining the absolute particle density with greater accuracy.

A Spectroscopic Study Of Some Rare Earth Complexes, Richard M. Alire

Chemistry and Chemical Biology ETDs

The phenomenon of intramolecular energy transfer was studied using anthranilate, 8-hydroxyquinolate, 2-methyl-8-hydroxyquinolate, and salicylaldehyde rare earth chelates. Line emission characteristic of the rare earth ion was observed whenever the lowest triplet (measured) of the complex was higher in energy than the emitting (resonance) level of the rare earth trivalent ion. The path of energy transfer from the organic portion of the chelate to the rare earth ion was verified as going via the lowest or a nearby triplet state of the complex.

Permian Stratigraphy And Stratigraphic Paleontology Of The Colorado Plateau, Peggy L. Kirkland

Earth and Planetary Sciences ETDs

The purpose of this study is to synthesize a portion of this vast source of data in order to arrive at a better understanding of Permian stratigraphy.

Geology Of Torreon And Pedricenas Quadrangles, Coahuila And Durango, Mexico, Russell E. Clemons

Earth and Planetary Sciences ETDs

The Torreon and Pedricenas quadrangles are in central Mexico between parallels 25 degrees and 26 degrees N. and meridians 103 degrees 20' and 104 degrees W.; together they embrace 7,600 square kilometers. The northeastern corner of the area lies in the Bolson de Mapimi; most of the area, however, is in the Sierra Madre Oriental.

Hypogene Zoning In The Lordsburg Mine District, Hidalgo County, New Mexico, K. F. Clark

Earth and Planetary Sciences ETDs

Although descriptions of the Lordsburg mining district have been in the literature for more than fifty years, no reference to hypogene zoning of the ores has been made. The present work is mainly concerned with hypogene zoning and related phenomena. Hypogene zoning, temperature of formation, and paragenesis are interrelated factors in ores differentiated from magmas. All three processes are discussed in this thesis. Other aspects of the mining district are mentioned only where relevant.

Stratigraphy And Paleontology Of The Pennsylvanian Rocks Of The Rim Of The Sandia Mountains, Sandoval And Bernalillo Counties, New Mexico, Paul Anthony Catacosinos

Earth and Planetary Sciences ETDs

The primary purpose of this investigation was to determine the presence or absence of pre-Pennsylvanian strata in the central part of the Sandia Mountains, along their western scarp. No strata older than Pennsylvanian were found by the author in this area.

The strata present in the Sandia Rim include the upper clastic member of the Sandia formation and part of the lower gray limestone member of the Madera limestone, both of Pennsylvanian age.

The Sandia formation is a predominantly clastic unit of sandstone, shale, limestone, and conglomerate which rests unconformably on a profound erosion surface formed on the Precambrian Sandia …

Stratigraphy And Geologic Structure Of Uppermost Cretaceous And Tertiary Rocks Of The East-Central Part Of The San Juan Basin, New Mexico, Elmer H. Baltz

Earth and Planetary Sciences ETDs

An area of about 1,300 square miles was mapped in parts of Rio Arriba, Sandoval, and McKinley Counties, New Mexico. The area is in the east-central part of the San Juan Basin, a large structural and drainage basin in the east-central part of the Colorado Plateau province. Six relatively distinct physiographic sectors in the area are named here: the Penistaja Cuestas; Largo Plains; Tapicitos Plateau; Yeguas Mesas; San Pedro Foothills; and Northern Hogback Belt.

The mapped area lies in the Central basin of the San Juan Basin and is bounded on the east by the Nacimiento and French Mesa-Gallina uplifts …

A Telemetric Compass, Paul Nelson Jr.

Physics & Astronomy ETDs

In certain types of experiments involving balloon-borne equipment it is desirable to know how the orientation of the apparatus varies with time. The author has investigated a method of telemetering azimuthal orientation from a balloon to the ground, and has constructed a protoype of a telemetering magnetic compass. The basis of the compass is a rotating-ring magnetometer of the type first described by Nielsen (1) and used by others (2,3,4) for various purposes. The output of this device consists of two a.c. signals, whose relative phase is determined by the orientation of the magnetometer with respect to the external magnetic …

An Experimental Analysis Of The Lateral Distribution Of Cores Of Extensive Air Showers, Carl E. Scheie

Physics & Astronomy ETDs

It is the purpose of this thesis to investigate the lateral distribution of cores of EAS from a central detector. If the experimental results agree with those predicted theoretically, it can be assumed that the method of locating cores is reliable, thus making it possible to study the energy transfer in EAS.

On The Initial Value Problem For The Quasi-Linear Parabolic Partial Differential Equation, Henry Hermes

Mathematics & Statistics ETDs

In this paper we consider second order parabolic partial differential equations on the infinite strip. We confine our attention to the quasi-linear equations, and in particular, the problem

(0-1) u͙(t,x) = f(u)u_xx(t.x) , (t,x) ε(0,T)x(-∞,∞) ≡ D_{T, T>0}

u(0,x) = u₀(x) , x ε (-∞,∞).

Existence, uniqueness and properties of the solution are discussed. These results can be immediately generalized to problems where the differential equation is of the form u͙(t,x) = f(t,x,u)u _xx(t,x).

Geology Of The Empire Abo Field, Eddy County, New Mexico, Don O. Snyder

Earth and Planetary Sciences ETDs

The Empire Abo field is situated in north-central Eddy County, New Mexico, and constitutes the edge of the Northwest Shelf province of the Delaware basin. The field occupies parts of 25 sections in T. 17 and 18 S., R. 27, 28, and 29 E.

The object of this study is to delineate the transition zone of lower Leonard (Permian) basinal deposition and shelf facies with a detailed study of fore-reef, reef, and back-reef facies with emphasis on sedimentational and stratigraphic relationships.

Anisotropy Of The Cosmic-Ray Flux Caused By An Interplanetary Magnetic Field, Ronald R. Harrington

Physics & Astronomy ETDs

The purpose of this study is to investigate the possibility that this diurnal variation in cosmic-ray flux may be due to a general dipole-like magnetic field centered upon the sun.

High Temperature Vaporization Behavior And Thermodynamic Properties Of Hafnium Diboride, Milton C. Krupka

Chemistry and Chemical Biology ETDs

Vaporization of hafnium diboride has been studied in a tungsten effusion cell over the temperature range 2175 degrees K. to 2500 degrees K. A low-melting eutectic at 2520 degrees K. prevented the use of the effusion cell technique at higher temperatures.

The Kinetics Of The Exchange Of Chlorine Atoms Between Hydrogen Chloride And Benzyl Chlorides, Warren Bruce

Chemistry and Chemical Biology ETDs

The study of the rates of chemical reactions in solutions has received a great deal of attention, primarily because of the relative ease with which such investigations can be persued; however, the great number of publications can never obscure the truth that a rigorous treatment of molecular processes in solutions is not available. The approach to the problem has been through extensions of theories which have their origins in descriptions of gaseous systems, and, with few exceptions, these extensions are firmly grounded on the techniques of classical thermodynamics. Hopefully, future advances in the calculation of the partition functions of molecules …

A Study Of The Elastic Scattering Of 25-Mev He3 Ions From Various Nuclei, Dale D. Armstrong

Physics & Astronomy ETDs

The validity of the assumption of strong absorption as the basis for the description of the interaction of He³ ions and nuclei was not definitely established and probably cannot be established without the application of more sophisticated theories.

Origins Of Shock-Induced Luminescence In Quartz, William P. Brooks

Physics & Astronomy ETDs

Alpha quartz is a piezoelectric material. As such, it will yield voltage under stress. When shocked with high explosive systems, the material is also luminescent. This luminescence is quite intense and can be recorded on normal films at submicrosecond exposure times.

The luminescence appears in various patterns determined both by the explosive system used and by the orientation of the quartz.

Fused quartz exhibits luminescence to a lesser degree. Since fused quartz is not piezoelectric, it is helpful in the determination of the origin of the luminescence in crystalline alpha quartz.

This study of the origin of the luminescence in …

A Liquid Hydrogen Bubble Chamber Designed For Use As A Neutron Spectrometer, Edward R. Flynn

Physics & Astronomy ETDs

A liquid hydrogen bubble chamber for use as a neutron spectrometer has been constructed and operated. The chamber employs 90^o stereography and is expanded by a piston located in the liquid. The construction and operation of the chamber are described. A special measuring microscope for analyzing the data is described along with the associated electronics for digitizing the screws of this device. Reading rates of 60 proton recoils per hour have been obtained and the reading procedure is discussed. Preliminary results from a neutron-proton differential cross section measurement indicates a resolution of 5% may be obtained with 22 Mev …

A Satellite Ratemeter Circuit, Daniel P. Christman

Physics & Astronomy ETDs

It was proposed that an attempt be made to measure the directional energy of high-energy primary gamma radiations in space. The difficulties of such an effort are readily obvious. To escape the environmental air envelope of the earth and to lessen the interference of secondary radiations, an instrument package would have to placed into a known orbital trajectory.

A Telemetering Inclinometer, Robert G. Geil

Physics & Astronomy ETDs

In present day experiments in Atmospheric Physics, information from the experiment is sometimes telemetered to observers located at positions remote from the apparatus. To obtain data from the stratosphere an instrument package may be sent aloft suspended from balloons. It is often desirable to know the azimuthal orientation of the instrument package.

To achieve this purpose a rotating ring magnetometer has been developed at the University of New Mexico to measure azimuthal orientation using the earth's magnetic field for a reference. This is sufficient for many purposes. However, due to the wind currents the package suspended beneath the balloon may …