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A Numerical Solution For Weak Disturbances In A Large Scale Hydromagnetic Field, Patrick J. Blewett

Physics & Astronomy ETDs

Our concern here will be to investigate the form of certain solutions of equation (7); we will be content with a two-dimensional analysis.

Conversion Of Electromagnetic Waves Into Magnetohydrodynamic Waves At The Interface Of A Dielectric And Incomprehensible Fluid, Ralph L. Marsten

Physics & Astronomy ETDs

Consider space to be separated into two semi-infinite regions by a rigid boundary. On one side lies medium A--a perfect, rigid, dielectric, with electric permittivity € and magnetic permeability µ. On the other side is medium B; a perfect, fluid, perfectly conducting, also with magnet permeability µ. Throughout all spaces exist a uniform static magnetic field H.

Now such a fluid as medium B is capable of supporting a magnetohydrodynamic (MHD) wave; and of course a perfect dielectric will support an electromagnetic (EM) wave. Suppose then, that a uniform plane EM wave in medium A is incident at arbitrary angle …

A Study Of The Radioactive Decay Of The Two Isomers Of Pd109 And Of The Associated Low-Lying Levels Of Ag109, John W. Starner

Physics & Astronomy ETDs

The radiations of Pd¹⁰⁹ (13.45 ± 0.01 hr) and Pd^109m(4.69 ± 0.01 min) have been investigated with a coincidence scintillation spectrometer and a solenoidal beta-ray spectrometer. Pd^109m was observed to have only one mode of decay: a 188-kev (E3) isomeric transition to Pd¹⁰⁹. The principal beta-ray group (>99.9%) of Pd¹⁰⁹ was found to have an end-point energy of 1.025 ± 0.005 Mev. Gamma rays of the following energies (kev) and approximate intensities (photons/10⁵ disintegrations) were observed to acccmpany the decay of Pd¹⁰⁹: 773 (4), 707 (2), 643 (10), 602 …

Method For Interpreting Extensive Air Shower Data, Darrell C. Kent

Physics & Astronomy ETDs

Three major topics are discussed in this thesis. The first of these has immediate application to analysis of air shower data which is presently being gathered by two large scintillation tanks located immediately behind the University of New Mexico physics building. The data with which the other two topics are concerned cannot be gathered with present equipment, but these preliminary calculations have been performed in anticipation of the installation of the appropriate apparatus.

An Experimental Method Of Determining The Shape Of Millimicrosecond Radiation Pulses, Robert Braslau

Physics & Astronomy ETDs

The problem with which this investigation is concerned was to construct suitable apparatus to measure accurately the shape and the duration of a pulse of δ-radiation of approximately 10 Mev energy and 20 mμ sec duration. In particular, the shape of the tail of the pulse had to be determined as accurately as possible, so that millimicrosecond half lives can be measured accurately with the betatron.

Recording Of Geomagnetic Field Variations In An Orthogonal System, Chistian Schroeder

Physics & Astronomy ETDs

Magnetic field variations in both magnitude and direction are known to occur due to such phenomena as atmospheric tides and solar activity. Magnetic storms caused by solar activity may bring about variations in excess of one percent of the magnitude of the earth's normal magnetic field; but in general the changes are slight and require sensitive instruments for their measurement.

Characteristics And Calibration Of A Large Liquid Scintillator, James R. Barcus

Physics & Astronomy ETDs

It is the purpose of this thesis to present in some detail the method and results of the calibration -- in particular, the determination of the single particle pulse height which is crucial to any meaningful interpretation of the observational data.

The Absolute Excitation Functions For The I 127 (N,Y) I 128 And Na 23 (N,Y) And Na 24 Reactions, Richard L. Cubitt

Physics & Astronomy ETDs

Radiative capture (n,y) cross sections, in addition to their theoretical interest, are of great practical importance to the technology of reactor design. A knowledge of the absolute excitation functions of the various materials employed in reactors permits calculation of the effect of these materials on the reactivity of a reactor, and also enables shielding calculations to be made.