Adsorption of Inorganic Anions on a Mercury Electrode from Solutions of Formamide
Adsorption of Inorganic Anions on a Mercury Electrode from Solutions of Formamide

Author: Richard Payne

Publisher:

Published: 1965

Total Pages: 28

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A theory of hydromagnetic ionizing waves has been developed which is valid in the region in which gas pressure is negligible, compared with magnetic pressure. The theory takes into account the energy expended in partial ionization of the gas behind the wave. The usual high conductivity boundary condition behind the wave is not employed. The electric field in front of the wave is taken as a parameter. Results of this theory are compared with available experimental measurements, and show good agreement. (Author).

Effects of Experimental Parameters on Thermoluminescence of a Type II-a Diamond
Effects of Experimental Parameters on Thermoluminescence of a Type II-a Diamond

Author: Albert D. Johnson

Publisher:

Published: 1965

Total Pages: 42

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Thermoluminescence provides a method for studying properties of those crystalline imperfections which behave as electron traps and recombination centers in wide bandgap materials. This approach, however, has been used relatively little, possibly due to the fact that the shapes and intensities of thermoluminescent glow curves are functions of several experimental parameters and are often complicated by the overlapping of a number of individual glow peaks. In the present work, experimental parameters were isolated and some of their effects on thermoluminescent glow curves were analyzed. This yielded information on activation energies associated with trapping levels, the nature of the kinetics involved in electron transitions, and electron retrapping. A Type II-a diamond, which has a wide distribution of thermoluminescent glow peaks, was used in this work. (Author).

A Discussion of the Wheeler-Feynman Absorber Theory of Radiation
A Discussion of the Wheeler-Feynman Absorber Theory of Radiation

Author: Ronald G. Newburgh

Publisher:

Published: 1965

Total Pages: 34

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The Wheeler-Feynman absorber theory of radiation is reviewed. A proof is offered to show that a sum of advanced and retarded effects from the absorber can provide the origin of radiative reaction. This proof is different from and perhaps simpler than that of Wheeler and Feynman. From arguments of momentum and energy conservation the necessity of the absorber for the emission of radiation is demonstrated for three cases. (Author).

The Theoretical and Numerical Determination of the Radar Cross Section of a Finite Cone
The Theoretical and Numerical Determination of the Radar Cross Section of a Finite Cone

Author: F. V. Schultz

Publisher:

Published: 1965

Total Pages: 14

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In this work, rigorous electromagnetic theory is used to determine the nose-on radar cross section of a perfectly conducting cone of finite height. The end cap of the cone is assumed to be a segment of a s spherical surface with center at the apex of the cone. Numerical results have been obtained for a cone having a total apex angle of 30 degrees and for values of [kappa alpha] ranging from 0.0259 to 5.18, where [kappa]=2 [pi]/[lambda] and [alpha] is the radius of the base of the cone. Siegel's Rayleigh method and by using Keller's modified geometrical optics as well as with experimental results obtained by Keys. The comparisons are instructive below [kappa alpha] = 3.2, the apparent upper limit of validity of the present results -- p.[3].

A Study of Band Edge Distortion in Heavily Doped Germanium
A Study of Band Edge Distortion in Heavily Doped Germanium

Author: Freeman D. Shepherd (Jr.)

Publisher:

Published: 1965

Total Pages: 98

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Details of the energy band structure of degenerate n-type germanium were determined by analysis of fine structure in the 4.2K volt-ampere characteristic of germanium tunnel diodes. No shift in the relative energy of the conduction band minima was observed. The band edge is found to be exponentially distributed with 1/e energies of the order of 10 MeV. There appears to be an ordering mechanism among the group V impurity atoms used as substrate dopants. (Author).

Report on Research at AFCRL
Report on Research at AFCRL

Author: Air Force Cambridge Research Laboratories (U.S.)

Publisher:

Published: 1965

Total Pages: 322

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Summaries are given of research in the following fields: upper atmosphere physics, microwave physics, space physics, terrestrial sciences, optical physics, data sciences, meteorology, solid state, aerospace instrumentation.

Experimental Study of Zone Refining of the Binary System Triphenyl Antimony-benzoic Acid
Experimental Study of Zone Refining of the Binary System Triphenyl Antimony-benzoic Acid

Author: Marvin S. Brooks

Publisher:

Published: 1965

Total Pages: 94

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An experimental study on the zone refining of the binary system triphenyl antimony-benzoic acid is described. The isotope Sb124, which is a strong gamma emitter, was employed as a tracer; this allowed a rapid in situ nondestructive analysis, closely spaced experimental points, and the opportunity to study distribution as a function of varying experimental conditions. With the aid of computers (IBM 7090 and IBM 7044) apparent k's were calculated and the experimental data compared with those predicted from various mathematical models. (Author).