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  Partner: UNT Libraries
 Degree Discipline: Physics
 Collection: UNT Theses and Dissertations
The Effects of Lead Placement and Sample Shape in the Measurement of Electrical Resistivity

The Effects of Lead Placement and Sample Shape in the Measurement of Electrical Resistivity

Date: August 1970
Creator: Stephens, Anthony E.
Description: This thesis is a study of the effects of lead placement and sample shape in the measurement of electrical resistivity.
Contributing Partner: UNT Libraries
A Determination of the Bothe Depression Factor for Discs in Water

A Determination of the Bothe Depression Factor for Discs in Water

Date: August 1950
Creator: Patton, Bob
Description: 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.
Contributing Partner: UNT Libraries
A Study of the Decay Levels of 169/Tm69

A Study of the Decay Levels of 169/Tm69

Date: December 1970
Creator: Harris, Robert J.
Description: The purpose of this investigation was to study the radiations of the 169/Tm nucleus as it de-excites after the electron capture decay of the 169/Yb. Numerous unreported gammas were present in the sample. The origins of these gamma rays were found.
Contributing Partner: UNT Libraries
(N, 2N) Cross Section Measurements in Praseodymium-141 as a Function of Neutron Bombarding Energy

(N, 2N) Cross Section Measurements in Praseodymium-141 as a Function of Neutron Bombarding Energy

Date: May 1971
Creator: Marsh, Stephen Addison
Description: Using the parallel disk method of activation analysis, the (n,2n) reaction cross section in 141-Pr was measured as a function of neutron energy in the range 15.4 to 18.4 MeV. The bombarding neutrons were produced from the 3-T(d,n)4-He reaction, where the deuterons were accelerated by the 3-MV Van de Graff generator of the North Texas Regional Physics Laboratory in Denton, Texas.
Contributing Partner: UNT Libraries
Phase Shift Determination for Elastic Potential Scattering, Using the IBM 360-50 Computer

Phase Shift Determination for Elastic Potential Scattering, Using the IBM 360-50 Computer

Date: May 1971
Creator: Psencik, James A.
Description: The primary objective of this paper is to present a computerized method for the extraction of phase shifts from an angular distribution. This was accomplished using a least squares curve fitting routine.
Contributing Partner: UNT Libraries
Carbon Contamination Measurements in Single Silicon Crystals

Carbon Contamination Measurements in Single Silicon Crystals

Date: December 1970
Creator: Logsdon, Lawrence E.
Description: The intent of this investigation was to directly measure the amount of carbon contamination in a single silicon crystal and, in so doing, develop a mathematical procedure that would be applicable to other contaminants in other substances.
Contributing Partner: UNT Libraries
Nuclear Reactions on the Palladium Isotopes

Nuclear Reactions on the Palladium Isotopes

Date: December 1970
Creator: White, Ronald Lee
Description: The problem of interest in this investigation was to determine the cross sections of five nuclear reactions which occur when irradiating natural palladium with neutrons which have energy values of 15.1, 15.9, and 16.3 MeV. The cross sections were measured relative to a copper monitor which was "sandwitched" in with the palladium target.
Contributing Partner: UNT Libraries
Investigation of the Uniaxial Stress Dependence of the Effective Mass in N-Type InSb Using the Magnetophonon Effect

Investigation of the Uniaxial Stress Dependence of the Effective Mass in N-Type InSb Using the Magnetophonon Effect

Date: December 1971
Creator: Alsup, Dale Lynn
Description: The magnetophonon effect was used to investigate the uniaxial stress dependence of the effective mass in n-type InSb (indium antimonide).
Contributing Partner: UNT Libraries
A Study of Minority Atomic Ion Recombination in the Helium Afterglow

A Study of Minority Atomic Ion Recombination in the Helium Afterglow

Date: August 1972
Creator: Wells, William E.
Description: Electron-ion recombination has been under study for many years, but comparisons between theory and experiment have been very difficult, especially for conditions where the ion under evaluation was a minority in concentration. This study describes a direct measurement of the recombination-rate coefficient for the recombination of minority as well as majority ions in the afterglow.
Contributing Partner: UNT Libraries
Gamma Ray Distribution from Neutron Excitation in Cesium

Gamma Ray Distribution from Neutron Excitation in Cesium

Date: January 1969
Creator: Bowers, Richard Morgan
Description: The purpose of this investigation was to analyze the gamma rays resulting from excitation of Cs133 by the inelastic scattering of 14 MeV neutrons and to determine the relative intensity of each gamma ray.
Contributing Partner: UNT Libraries