ANNUAL SUMMARY RESEARCH REPORT IN PHYSICS, JULY 1, 1959-JUNE 30, 1960 [electronic resource]
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| Online Access: |
Online Access |
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| Corporate Author: | |
| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Ames, Iowa : Oak Ridge, Tenn. :
Ames Laboratory ; distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
1960.
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| Subjects: |
| Abstract: | Research in theoretical and experimental physics is summarized. The method of Wyse and Mayall for estimation of density distributions in stellar galaxies from observed rotational velocities was extended to a more realistic model. Methods of calculating pair production or bremsstrahiung cross sections are discussed. The presence of 10 previously unreported gamma rays was observed in the decay of Ag/sup 1//sup 1//sup 3/. The photoproton yield from Be/ sup 9/ was investigated. Theoretical studies were made of a proposed new type of electron muitlplying discharge. The Scebeck coefficients of several single crystals of Mg/sub 2/Si were measured from 7 to 1000 deg K. New data were obtained on the resistivities and Hall coefficients of Mg/sub 2/Si. A new technique for measuring the thermal diffusivities of soilds was devised. A dynamic pulse-heating method was developed for measuring the specific heats of metal wires from room temperature to 1000 deg C. The specific heat of copper was determined. Methods for measuring microwave Hall mobillties in semiconductors were improved. The resistivity of sodium tungsten bronze as a function of sodium composition was obtained down to 4 deg K. Studies are being made of the frequency dependence of the resistance and capacitance of samples of AgBi. A single crystal of holmium metal was obtained by anneallng an arc-melted button and examining in fields up to 18 kllogauss. Magnetic moments in erbium crystals were investigated. The resistivities of nearly all of the rareearth metals in polycrystalline form were determined down to 1.3 deg K. Highly degassed samples of high-purity tantaium were produced. The superconductlng properties of a soild phase of mercury were investigated. The effect of pressure on the superconducting critical field curve of tin was also measured. The effect of pressure on the Curle temperature of dysprosium was measured. A study was made of the absorption and dispersion mode nuclear magnetic resonance signals of Li/ sup 7/ in solld lithium metal. Nuclear quadrupole resonances in very ionic haildes were measured. The crystal counting properties of diamond were used to study the processes associated with charge carrier trapplng. The sublimation of indium from alloys with silver was investigated. (M.C.G.) |
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| Item Description: | Published through SciTech Connect. 09/01/1960. "is-191" |
| Physical Description: | Pages: 71 : digital, PDF file. |