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Articles 9001 - 9030 of 9199
Full-Text Articles in Physical Sciences and Mathematics
Anisotropy Of The Cosmic-Ray Flux Caused By An Interplanetary Magnetic Field, Ronald R. Harrington
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.
A Study Of The Elastic Scattering Of 25-Mev He3 Ions From Various Nuclei, Dale D. Armstrong
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
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
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 90o 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
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
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 …
Considerations Of The Motion Of A Small Body In The Vicinity Of The Stable Liberation Points Of The Earth-Moon System, William H. Michael
Considerations Of The Motion Of A Small Body In The Vicinity Of The Stable Liberation Points Of The Earth-Moon System, William H. Michael
Dissertations, Theses, and Masters Projects
No abstract provided.
A Theory Of Space Probe Entry Near The Low-Meteoric Velocity Limit, Frederick Cyril Grant
A Theory Of Space Probe Entry Near The Low-Meteoric Velocity Limit, Frederick Cyril Grant
Dissertations, Theses, and Masters Projects
No abstract provided.
The Visibility Of An Object In A Space Environment, Dennis J. Martin
The Visibility Of An Object In A Space Environment, Dennis J. Martin
Dissertations, Theses, and Masters Projects
No abstract provided.
"Invariant Imbedding" And Wave Propagation In Inhomogeneous Media, Crawford J. Maccallum
"Invariant Imbedding" And Wave Propagation In Inhomogeneous Media, Crawford J. Maccallum
Physics & Astronomy ETDs
We wish now to address ourselves to that problem which can be described in physical terms as the reflection and transmission of "waves" by and through some sort of "transition region" between two homogeneous media. At this stage we will work strictly within one dimension; later on this severe restriction will be somewhat eased. For simplicity of notation we will for the present give the transition region a finite thickness h; later on we will often allow h to become infinite when the disturbance due to the transition region dies away fast enough with distance.
A Note On K-Commutative Matrices, D. W. Robinson
A Note On K-Commutative Matrices, D. W. Robinson
Faculty Publications
Let A and B be square matrices over a field in which the minimum polynomial of A is completely reducible. It is shown that A is k commutative with respect to B for some non-negative integer k if and only if B commutes with every principal idempotent of A. The proof is brief, simplifying much of the previous study of k-commutative matrices. The result is also used to generalize some well-known theorems on finite matrix commutators that involve a complex matrix and its transposed complex conjugate.
Long-Range Particles From Nuclear Fission, Ralph A. Nobles
Long-Range Particles From Nuclear Fission, Ralph A. Nobles
Physics & Astronomy ETDs
This work is concerned with experimental observations of the long-range particles which are occasionally emitted by fissioning nuclei. These particles are known to be principally alpha particles and are of interest because they are associated with the configuration of the nucleus at the crucial time of scission. Observations were made of the energy spectra of long-range particles by means of a thallium-activated multiple CsI crystal scintillator device.
A Calibration Method For Satellite Cerenkov Instrumentals, Robert E. Dekinder Jr.
A Calibration Method For Satellite Cerenkov Instrumentals, Robert E. Dekinder Jr.
Physics & Astronomy ETDs
The problem posed for this thesis is one of determining a method of calibrating a photomultiplier tube when it is contained in an orbiting instrumentation package. Since it is planned for the satellite to remain in orbit for about two years, a method to determine drift of the telemetered output versus the selected radiation input would be very desirable. This drift could arise from changes in the power supplied to the system, or by the telemetering or logic circuits changing characteristics from exposure to cosmic radiation. The situation requires that light of constant intensity be produced in the "field of …
The Wavelength Shifting Of Cerenkov Radiation, Philip A. Deutchman
The Wavelength Shifting Of Cerenkov Radiation, Philip A. Deutchman
Physics & Astronomy ETDs
The main interest in this paper is to study the effect of the florescent wavelength shifter "POPOP" with respect to Cerenkov radiation and to determine how the efficiency of a Cerenkov counter is affected.
Angular Distribution Of Electrons In Extensive Air Showers, Don D. Laniewski
Angular Distribution Of Electrons In Extensive Air Showers, Don D. Laniewski
Physics & Astronomy ETDs
Electrons are the main products of an extensive air shower and comprise approximately 90% of the shower. Since these electrons are the most numerous particles near the axis of a large shower and are not easily detected, extensive air showers are most easily studied by means of the electronic component. Thus, whatever concern there may be about the nucleonic cascade of which the electron is an outgrowth, it is necessary first to understand the development of the electronic component and is lateral and angular distribution. Also, for the correct analysis of any experimental data, it is of particular importance to …
An Analysis Of Bursting Bubbles At Liquid Surfaces, Keith James Gilbert
An Analysis Of Bursting Bubbles At Liquid Surfaces, Keith James Gilbert
Physics & Astronomy ETDs
This phenomenon of the spray produced by bursting bubbles at liquid surfaces is certainly familiar to drinkers of carbonated soda pop, champagne and other effervescent liquids. This same phenomenon has been observed at ocean surfaces. Small bubbles, some of which originate at great depths, rise to the surface and break; tiny droplet is thrown upward from most of the imploding bubbles. Some of these droplets may be caught and carried into the atmosphere by winds sweeping along the surface. The droplets evaporate but leave small particles of salt suspended in the air; the particles then serve as condensation nuclei and …
Absorbance Of The Oh Radical In A Specific Wavelength Interval Near 309a, Paul F. Bird
Absorbance Of The Oh Radical In A Specific Wavelength Interval Near 309a, Paul F. Bird
Physics & Astronomy ETDs
The absorbance of the OH radical as a function of optical density was studied by computing the absorbance for an incident radiation in the wavelength interval 3089A-3097A. The absorbance was studied for 3 different temperatures and various values of the parameters specifying the line shapes and magnitude of the spectral absorption coefficient.
Design Of An Instrument To Detect High Energy Photons At High Altitudes, Donald L. Evans
Design Of An Instrument To Detect High Energy Photons At High Altitudes, Donald L. Evans
Physics & Astronomy ETDs
The purpose of this thesis is to design a high altitude instrument which will detect photons with an energy greater than 1 Bev, and which will discriminate between zenith and albedo radiation.
Isomerism In Bromine Nuclei, Albert Goodman
Isomerism In Bromine Nuclei, Albert Goodman
Physics & Astronomy ETDs
If the phenomenon of isomerism occurred in bromine nuclei, it would be of great help in elaborating the level schemes of these isotopes. The occurrence of isomerism in the odd isotopes of arsenic and rubidium, the nearest odd-Z neighbors to bromine, suggested similar behavior in bromine odd-Z isotopes. In this investigation, the pulsed-beam method was used to search for isomers. The procedure consisted of pulsing the beam of a Van de Graaff accelerator and counting any resulting activities during the time between beam pulses. After preliminary surveys during which natural bromine was bombarded with neutrons and natural selenium was bombarded …
A Proposal For The Use Of The Method Of Characteristics As A Condition On The Numerical Solutions Of Two-Dimensional Lagrangian Isentropic Flow, Christian D. Anderson
A Proposal For The Use Of The Method Of Characteristics As A Condition On The Numerical Solutions Of Two-Dimensional Lagrangian Isentropic Flow, Christian D. Anderson
Physics & Astronomy ETDs
The method of characteristics has been widely used in two- dimensional problems (i.e., one spatial dimension and time or two spatial dimensions for the steady state), and it was felt that this method, in all or part, could be applied to time-dependent, two- space hydrodynamics.
In this paper we have done the following:
1. Derived the two-dimensional, time-dependent, nonviscous Lagrangian Equations;
2. Discussed, in general, some aspects of the method of characteristics;
3. Applied the method to our Lagrangian equations; and finally,
4. Proposed a possible application of our results to the numerical solution of the Lagrangian equations.
In …
Muon Component Of Extensive Air Showers., Ryan Pierson Jr.
Muon Component Of Extensive Air Showers., Ryan Pierson Jr.
Physics & Astronomy ETDs
The purpose of this thesis is to determine how the muon component of an extensive air shower varies with the energy of the incident primary particle and different values of inelasticity and multiplicity for the nuclear interactions according to a simple theory of extensive air showers suggested by Professor Roy Thomas of the University of New Mexico. The method of attacking this problem will be to calculate the number of muons resulting from decay of pions produced in each nuclear interaction of the primary particle and from this the total number of muons passing through certain levels of the earth’s …
Measurements Of The Intensity Of Mu-Mesons In Cosmic Rays During A Period Of Unusual Solar Activity, Ronald A. Korsak
Measurements Of The Intensity Of Mu-Mesons In Cosmic Rays During A Period Of Unusual Solar Activity, Ronald A. Korsak
Physics & Astronomy ETDs
Because of the incomplete understanding of the processes which cosmic rays undergo in the atmosphere, there is still no generally accepted treatment of the atmospheric dependent variations of the intensity or preferred method of establishing correct coefficients.
Three-Color Photometry Of The Zodiacal Light, Alan W. Peterson
Three-Color Photometry Of The Zodiacal Light, Alan W. Peterson
Physics & Astronomy ETDs
The major effort of the observational phase of this investigation was placed upon obtaining absolute intensity maps of the zodiacal light in three different colors. Emphasis was also placed upon measurements of polarization and upon photographing the spectrum of the zodiacal light.
Time Variations On The Cosmic-Ray Flux Near The Geomagnetic Equator, Charles L. Hyder
Time Variations On The Cosmic-Ray Flux Near The Geomagnetic Equator, Charles L. Hyder
Physics & Astronomy ETDs
The search for an anisotrophy in the penetrating component of the cosmic-ray flux is usually carried out with narrow-angle directionally sensitive detectors located near the surface of the earth. Directional sensitivity is achieved by using a cosmic-ray telescope, consisting of Geiger counters or of scintillation counters, in a coincidence arrangement. Thus a solid angle of acceptance for the cosmic-ray particles is defined.
Core Location Of Extensive Air Showers, James H. Jett
Core Location Of Extensive Air Showers, James H. Jett
Physics & Astronomy ETDs
Extensive air showers have been studied as part of cosmic ray phenomenology since 1938. They are made up of electrons, photons, and many other particles which traverse the earth's atmosphere toward the earth. The showers are initiated by high energy cosmic rays. The primary cosmic rays are nuclei which have been stripped of their orbital electrons.
To this end an experiment is underway in the University of New Mexico Physics Department to determine the amount of energy transferred from the core of the shower to the electron-photon cascade. By using a detector telescope with appropriate absorber between the two detectors, …
Editorial, Space Enterprises, Inc.
Nasa News, Space Enterprises, Inc.
Washington Report, Space Enterprises, Inc.
A Search For The Space Man's Food, Robert G. Tischer
A Search For The Space Man's Food, Robert G. Tischer
Space Journal
No abstract provided.
Roy Marquart, The Ramjet Man, Lois Philmus