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Articles 1 - 30 of 39
Full-Text Articles in Physical Sciences and Mathematics
Ferrimagnetic Structure Of Magnetoelectric Ga2-XFeXO3, Richard B. Frankel, N. A. Blum, S. Foner, A. J. Freeman, M. Schieber
Ferrimagnetic Structure Of Magnetoelectric Ga2-XFeXO3, Richard B. Frankel, N. A. Blum, S. Foner, A. J. Freeman, M. Schieber
Physics
No abstract provided.
Phase Shift Analysis Of Protons Elastically Scattered By 016 Near EP = 8.3 Mev, Glenn D. Westin
Phase Shift Analysis Of Protons Elastically Scattered By 016 Near EP = 8.3 Mev, Glenn D. Westin
Masters Theses
Chapter I
Introduction
The study of the resonances in the scattering cross section of the p + O16 reaction can reveal information regarding the energy levels of the compound nucleus F17. The analysis is simplified because of the zero spin of the O16 nucleus. Also, the low binding energy of the proton added to O16 allows examination of the low-lying energy levels in F17.1 The reaction has been intensively investigated at the University of Wisconsin in a series of experiments using an electrostatic accelerator as a source of protons.
The Calculation Of The Cross-Section Of The Interaction Between Two Yang-Mills Fields, Richard A. Starr
The Calculation Of The Cross-Section Of The Interaction Between Two Yang-Mills Fields, Richard A. Starr
Masters Theses
The Problem and Its Background
This thesis presents a study of the interaction between two arbitrary fields, named Yang-Mills fields1 for their originators. The basic equations for the calculations of the Yang-Mills interaction are due to modern quantum field theory and its specific application to quantum electrodynamics.2
Much useful information can be obtained from the formulation of the dynamical equations for a classical system: for example, the classical description of the electromagnetic field, based on Maxwell's equations, leads to wave concepts. Then using this formalism as a starting point, one can proceed to the quantum theory of free …
Cerium Magnesium Nitrate Temperature Scale From Nuclear Orientation, Richard B. Frankel, D. A. Shirley, N. J. Stone
Cerium Magnesium Nitrate Temperature Scale From Nuclear Orientation, Richard B. Frankel, D. A. Shirley, N. J. Stone
Physics
Systematic deviations were found below 0.003°K in the temperature dependence of nuclear orientation of Ce137m in cerous magnesium nitrate, using the temperature scale proposed by Daniels and Robinson. The temperature scale below 0.006°K was redetermined using a new method: nuclear orientation. This has the advantage over the 'Y-ray heating method of high sensitivity at the lowest temperature. The most striking result is hat a value of 1/T of 520, rather than the previously accepted 324, is obtained by demagnetization from initial condItions of 18.8 kG deg-1. The useful absolute temperature range is thus extended by …
Nuclear Magnetic Relaxation And Diffusion In Paraffin Oil, David E. Parker
Nuclear Magnetic Relaxation And Diffusion In Paraffin Oil, David E. Parker
Masters Theses
Introduction
Since the introduction of the spin echoes technique by E. L. Hahn1 many studies have been made in the determination of the spin relaxation T2, spin-lattice relaxation T1, and the diffusion rates in gases, liquids2-5, and solids6-10. Hahn's methods were later improved by Carr and Purcell11. The Carr-Purcell method serves as the basic technique for this study.
Several studies have been published on the relaxation and diffusion rates in hydrocarbons12. These studies have shown:
1. The spin relaxation time T2, is independent of the …
A Theoretical Study Of Light Scattering From Water Droplets., Aaron J. Cox
A Theoretical Study Of Light Scattering From Water Droplets., Aaron J. Cox
Physics & Astronomy ETDs
No abstract provided.
On The Scintillation Of Stars., Mary Elizabeth Prince Phelan
On The Scintillation Of Stars., Mary Elizabeth Prince Phelan
Physics & Astronomy ETDs
The nature of stellar scintillation is important to the astronomer and to the atmospheric physicist, but little quantitative work has been done in this area. This paper describes the results of an objective study of stellar scintillation. The principle measurements were concerned with a determination of the scintillation pattern and rate of a star which was observed simultaneously in two photoelectric telescopes whose distance could be varied. Other items measured included variations in rate of scintillation with: stellar magnitude, stellar altitude, atmospheric changes, and time of evening.
Ultrasonic Suspension Of Liquid Droplets For Light Scattering Studies, David L. Cutchin
Ultrasonic Suspension Of Liquid Droplets For Light Scattering Studies, David L. Cutchin
Physics & Astronomy ETDs
The construction and operation of an ultrasonic liquid droplet suspension device are described. The problem of generating intense sonic waves by matching the sonic transducer components is investigated. There is a description and analysis of a light scattering experiment performed on a suspended water droplet. The moat prominent characteristic of the scattered light was a rapid (10 to 100 cycles per second) time fluctuation in intensity. The variation in scattering cross section with droplet diameter predicted by the Mie theory and droplet shape oscillations are investigated as possible mechanisms producing the fluctuations.
Measuring Spin-Lattice Relaxation Times With A Super-Regenerative Spectrometer, Alfred C. Rester Jr.
Measuring Spin-Lattice Relaxation Times With A Super-Regenerative Spectrometer, Alfred C. Rester Jr.
Physics & Astronomy ETDs
Nuclear quadrupole resonance is a branch of radio frequency spectroscopy which was discovered in 1950 by Dehmelt and Kruger. (1). It is concerned with radio-frequency magnetic resonance absorption in molecular crystals. It results from the interaction of the nuclear quadrupole moment with the electric field gradient of the molecule charge cloud surrounding the nucleus. Different orientations of the nuclear axis relative to the field axis correspond to different energy levels. Resonance absorption takes place when an applied electromagnetic field cause transitions from one energy level to a higher one.
An Investigation Of Neutron Collimators And Their Application In Neutron Radiography., Roger A. Morris
An Investigation Of Neutron Collimators And Their Application In Neutron Radiography., Roger A. Morris
Physics & Astronomy ETDs
One of the most important diagnostic tools in the fields of medicine and industry is the use of penetrating radiation to detect flaws, inhomogeneities, and abnormal conditions within an object without permanently changing or destroying the object being inspected. The equipment, technique, and type of radiation employed vary widely between hospital, shop, or laboratory depending upon the particular conditions that are encountered and the results that are expected. Probably the most widely used radiation types are X-rays or gamma-rays and their applications in the above-mentioned fields need no further description. However, beams of thermal neutrons are becoming more and more …
Frederic Joliot-Curie And Atomic Energy By Pierre Biquard Pp. 109-211, Donald Printest Watkins
Frederic Joliot-Curie And Atomic Energy By Pierre Biquard Pp. 109-211, Donald Printest Watkins
Honors Theses
This is a translation of pages 109-211 of the biography Frederic Joliot-Curie Et L'energie Atomique by Pierre Biquard.
Ua77/1 Alumni Bulletin, Vol. 32, No. 2, Wku Alumni Association
Ua77/1 Alumni Bulletin, Vol. 32, No. 2, Wku Alumni Association
WKU Archives Records
Alumni newsletter published by WKU. This issue has the following articles:
- President Kelly Thompson Announces Master Plan
- Western to Offer Graduate Degree Program in Engineering Physics
- Summer Session Slated to Open on June 14
- Robertson, Lee. From the Alumni Office
- Class of 1915
- Class of 1925
- Class of 1940
- Class of 1955
- Class of 1964
- Sports in Brief
- William Solly Becomes New Physical Education Head
- Graduate Assistantships Now Available
- James McKee Joins Education Department
- On the Calendar
- Commencement Day Activities
Sign Change Of Induced Hyperfine Fields In The 5p Shell, Richard B. Frankel, J. J. Huntzicker, E. Matthias, S. S. Rosenblum, N. J. Stone
Sign Change Of Induced Hyperfine Fields In The 5p Shell, Richard B. Frankel, J. J. Huntzicker, E. Matthias, S. S. Rosenblum, N. J. Stone
Physics
No abstract provided.
Width Of Ion And Monopole Tracks In Emulsion, Robert Katz, J. J. Butts
Width Of Ion And Monopole Tracks In Emulsion, Robert Katz, J. J. Butts
Robert Katz Publications
The width of the tracks of ions in emulsion has been calculated from the assumption that a developable image is formed when the energy dosage deposited by delta rays exceeds a threshold value, here found to be 6000 ergs/cm2 in G-5 emulsion. The theory agrees with measurements of track width obtained by projecting track images to a magnification of 3000× and tracing around their outline, while truncating isolated delta rays at their bases. Agreement is to within a grain diameter to a range of about 4 cm. From the theory we infer that there is no Z intelligence contained …
The Discovery Of Quantum Mechanics, Patrick A. Heelan
The Discovery Of Quantum Mechanics, Patrick A. Heelan
Research Resources
In this chapter Heelan discusses how Heisenberg's insight of 1925, that physics should concern itself henceforth only with relations between observables, changed the intentionality-structure of physics. This insight led Heisenberg to the construction of a quantum mechanics of observables. Heelan briefly discusses the significance of his insighand of his rejection of Schrödinger's wave mechanics; the novelty of quantum mechanics as a physical theory, and the meaning he attributed to its most surprising result, viz., the Indeterminacy Relations. The crisis was a crisis of the rationalism inherent in the outlook of classical physics, and Heisenberg's insistence on "observable quantities" was a …
The Intentionality Structure Of Complementarity, Patrick A. Heelan
The Intentionality Structure Of Complementarity, Patrick A. Heelan
Research Resources
In this article Heelan argues that the return to the concrete and empirical implied in Heisenberg's insight on the importance of observables in physics was not, however, in Heisenberg's case, accompanied by a thorough re-thinking of the rationalist presuppositions of classical physics. The effect on Bohr, however, was to lead him to a complete rejection of rationalism and to the adoption of the contrary extreme, empiricism. The profound – though largely implicit – cause of the disagreement between Bohr and Heisenberg as to the correct interpretation of quantum mechanics, was resolved in the sumnler of 1927, by the common acceptance …
New Autoionizing Levels In Helium, M. Eugene Rudd
New Autoionizing Levels In Helium, M. Eugene Rudd
M. Eugene Rudd Publications
We recently reported the excitation of autoionizing states in helium by positive-ion bombardment and their subsequent observation as fine structure in the energy spectrum of the emitted electrons. With somewhat increased resolution we have now observed additional levels in helium including parts of two series not previously reported.
Physics-Mathematics Building At Kansas State University, Robert Katz
Physics-Mathematics Building At Kansas State University, Robert Katz
Robert Katz Publications
A building of about 134 000-sq ft area, containing research rooms, shops, store rooms, three lecture halls, classroom, and offices, for the Departments of Physics and of Mathematics has been completed at Kansas State University. Details concerning the construction, the provision of laboratory facilities, and special features of the building are given, as are floor plans and statements of costs involved.
An Account Of Measurements Of The Mean Range Of Polonium-210 Alpha Particles In Liquid Water, Clyde Eugene Moss Jr.
An Account Of Measurements Of The Mean Range Of Polonium-210 Alpha Particles In Liquid Water, Clyde Eugene Moss Jr.
Master's Theses
A comprehensive account of seven previous measurements of the mean range of Polonum-210 alpha particles in liquid water is presented. Suggestions for obtaining more accurate range measurements are made. The importance of the mean range value to radiobiology is mentioned.
Metrology--An Experiment Where Industry And Education Meet, R. B. Hastings
Metrology--An Experiment Where Industry And Education Meet, R. B. Hastings
Journal of the Minnesota Academy of Science
This paper describes a project in which students worked in close cooperation with both the physics department of Macalester College and the gage block laboratory of the Continental Machine Company, manufacturers of ,precision gage blocks. Brief descriptions, including drawings, are given of both the interferometer and the constant temperature laboratory in which all measurements were taken. This constant temperature laboratory is set with precision at those two temperatures between which the average coefficient of linear expansion of a gage block is to be determined. Many such readings were taken and computations of the coefficient of expansion were made. Comparison of …
Thick Target Bremsstrahlung Production In Silicon, Maurice C. Mcgee
Thick Target Bremsstrahlung Production In Silicon, Maurice C. Mcgee
Dissertations, Theses, and Masters Projects
No abstract provided.
Measurement Of N₂X¹[Sigma]⁺G Rotational And Vibrational Temperatures Over A 300⁰ K To 1100⁰ K Range Using A High-Energy Electron Beam, William Winslow Hunter
Measurement Of N₂X¹[Sigma]⁺G Rotational And Vibrational Temperatures Over A 300⁰ K To 1100⁰ K Range Using A High-Energy Electron Beam, William Winslow Hunter
Dissertations, Theses, and Masters Projects
No abstract provided.
Pair Distribution For A Cell-Model Liquid, James M. Phillips
Pair Distribution For A Cell-Model Liquid, James M. Phillips
Doctoral Dissertations
"The pair distribution function for a cell-model liquid has been derived by Lund in the form of an integral equation which depends upon the cell-center distribution function and the cell model. From this integral equation an approximate integral equation is obtained by substituting a function, which is linearly dependent upon the molecular pair distribution function and a variable parameter for the cell-center distribution function. This approximate integral equation is solved for the molecular pair distribution and the variable parameter is shown to depend upon the difference between temperature and the critical temperature. Although the exact numerical solution of the molecular …
Drop Growth In A Supersaturated Vapor, Roger Buecher
Drop Growth In A Supersaturated Vapor, Roger Buecher
Masters Theses
"Using kinetic theory and the thermodynamics of phase transitions, a method is derived for finding the growth rate and temperature increase of a droplet in water vapor which has been supersaturated by the expansion of a cloud chamber. Calculations are performed for a specific numerical example and compared to other work in this field"--Abstract, page [2].
A Study Of Re-Evaporation Nuclei, Ronald Dawbarn
A Study Of Re-Evaporation Nuclei, Ronald Dawbarn
Masters Theses
"Classical considerations of the evaporation of a homogeneously nucleated droplet in an atmosphere of low humidity, indicates complete evaporation of the drop. Experimental results however, show that there is left behind a residual nucleus that is quite stable. Condensation occurs on these nuclei at comparatively low supersaturations. Using a specially instrumented cloud chamber, experimental procedures are described which attempt to investigate some of the properties of these nuclei. Various possibilities causing this stability are examined and compared to the experimental results obtained"--page [ii].
Equation Of State Of Nacl And Its Use As A Pressure Gauge In High-Pressure Research, Daniel L. Decker
Equation Of State Of Nacl And Its Use As A Pressure Gauge In High-Pressure Research, Daniel L. Decker
Faculty Publications
The pressure as a function of lattice parameter and temperature has been calculated for NaCl over a pressure range of 0 to 500 kbar for temperatures between 0degrees and 1500degrees C. The calculation used the Mie-Gruneisen equation of state with Born-Mayer type repulsion terms between first and second nearest neighbors. The Gruneisen constant was expanded about its value at room temperature and atmospheric pressure; the first coefficient in the expansion being evaluated by forcing the calculated thermal expansion at atmospheric pressure to fit the experimental results of Enck. The two empirical parameters in the repulsion terms were evaluated using the …
A Study Of Near Surface Elastic-Anelastic Layers, Charles Allen Aldrich
A Study Of Near Surface Elastic-Anelastic Layers, Charles Allen Aldrich
Doctoral Dissertations
"Wave propagation through layered media is of importance in many disciplines. The near surface layers are of special significance, in that most measurements of waves are made within these layers. The purpose of this investigation was to formulate mathematical models with which to analyze the effects of near surface layering"--Introduction, page 1.
Derivation Of The Diffusion Equation And A Revision Of Matsuda's Theory For Polarography, W. Patrick Rahilly
Derivation Of The Diffusion Equation And A Revision Of Matsuda's Theory For Polarography, W. Patrick Rahilly
Electronic Theses and Dissertations
Many theories have been proposed to yield a current-time relationship in Polarography. The most widely accepted is that of Matsuda. He assumes that the electrolyte can be separated into an inhomogeneous region about the mercury drop and a homogeneous region elsewhere. This assumption leads to a first order , nonlinear, ordinary differential equation directly solvable by substitution of a properly chosen series. But the series solution obtained is only a particular solution; for there exists, as one would expect, a family of solutions depending on a contrast of integration. In the literature, derivation of the diffusion equation has never been …
Fock's Representation For Molecular Orbitals, Tai-Ichi Shibuya
Fock's Representation For Molecular Orbitals, Tai-Ichi Shibuya
University of the Pacific Theses and Dissertations
V. Fock studied the hydrogen atom problem in momentum space by projecting the space onto a 4-dimensional hyper-sphere. He found that as a consequence of the symmetry of the problem in this space the eigen-functions are the R4 spherical harmonics and that the eigenvalues are determined only by the principal quantum number n. In this chapter we note that if his method is applied to the 2-dimensional Kepler problem in momentum space, the eigenfunctions are the R3 spherical harmonics, Y1m, and the eigenvalues are determined only by the quantum number 1. These facts enable one to …
A Solution To Einstein's Gravitational Field Equation For A Spherically Symmetrical Static Perfect Fluid, Lionel Donnell Hewett
A Solution To Einstein's Gravitational Field Equation For A Spherically Symmetrical Static Perfect Fluid, Lionel Donnell Hewett
Doctoral Dissertations
"Given spherical symmetry, Einstein's gravitational field equations are reduced to a single, second order, linear, homogeneous differential equation. The solution of this equation for a homogeneous sphere is identical with Schwarzschild's solution...Values of relative density, interior mass, relative pressure, relative and absolute temperature are obtained as functions of radius, r, and are compared with corresponding values for the homogeneous sphere, and for a model sun"--Abstract, page v.