UNT Libraries Government Documents Department - 9 Matching Results

Search Results

Results: 1 - 9
open access

Production of Single Crystal Copper Films at Low Temperatures

Description: A method is described for the production of single‐crystal films of copper at temperatures as low as −40°C. This method utilizes the epitaxy of copper on rock salt. A thin layer of copper is evaporated on a single crystal of salt at 350°C. Then a thick layer is evaporated at the low temperature. Films grown by this method have been examined using x‐ray and etching techniques. It was found that some of these films had single‐crystal regions of 1 mm diameter and larger. These crystallites had [10… more
Date: April 1959
Creator: Yelon, Arthur
Item Type: Refine your search to only Report
open access

Injection Trajectories and Beam Matching for the Cambridge Electron Accelerator

Description: "ABS>Injection trajectories were calculated for different injection conditions for the Cambridge Electron Accelerator, considering also the effect of magnetic fringing fields. The general problem of matching the emittance of the linac to the acceptance of the synchrotron in the transversal phase space is considered, and it is shown that this can be done by a set of two quadrupole lenses. In order to eliminate rudial betatron oscillations due to energy deviations of the injected particles, a pul… more
Date: April 17, 1957
Creator: Steffen, Klaus G.
Item Type: Refine your search to only Report
open access

Precision Beta-Ray Spectroscopy : Termination Report

Description: Detailed information on the radiations associated with several even-even isotopes has been obtained. In some instances enough information has been gathered to allow construction of skeleton energy level diagrams for the isotopes. Activities studied were obtained from pile irradiation of pure odd-even natural isotopes and included Dy160, W182, Sm152, Gd152 and Gd154. Details of the work done on and results obtained for these isotopes are reported in section 3. Some analytic and experimental stud… more
Date: April 17, 1956
Creator: Fowler, C. M.
Item Type: Refine your search to only Report
open access

The Validity of the Statistical Theory of Pressure Broadening

Description: The statistical theory of pressure broadening is developed for any interaction law in which the potential energy is inversely proportional to some power of the distance between the molecules, including cases in which the forces change sign. This note is intended to prove two propositions: A. When a spectral line is broadened by single impacts of perturbing molecules and the half-width of the line is delta infinity, the statistical theory of broadening is applicable provided delta infinity . R … more
Date: April 3, 1956
Creator: Margenau, Henry, 1901-1997
Item Type: Refine your search to only Report
open access

Prebunching by Velocity Modulation in Linear Accelerators

Description: Methods of prebatching the electron beam by velocity-modulation techniques prior to injection into a linear accelerator are discussed. A particular method (i.e., bunching at the injection energy) is analyzed in detail for one- and tw0-cavidy bunching. The physical design f a single cavity prebuncher is given for a modulation voltage 10 percent of the injection voltage and a drift space of 40 cm.
Date: April 1956
Creator: Smårs, E. A.
Item Type: Refine your search to only Report
open access

Studies on the Experimental Pathology and Biochemistry of the Pulmonary Granulomatosis of Beryllium Workers. Section II, Consolidated Progress Report. Supplement: a Review of the Physical Chemistry of Beryllium

Description: The status of research is reviewed in a study of pulmonary granulomatosis in beryllium workers. Equipment for use in dust exposure studies is described. Preliminary results are reported from studies on the tissue distribution and pathological effects of beryllium dust in rats; the physical chemistry of solutions of beryllium salts; the effects of beryllium on enzyme systems, and the effects of ascorbic acid on beryllium excretion.
Date: April 25, 1955
Creator: Schepers, G. W. H. (Gerrit Willem Hendrik), 1914-
Item Type: Refine your search to only Report
open access

Grüneisen's Law and the Fusion Curve at High Pressure

Description: A method to determine the correction to Grüneisen's law corresponding to the effect of the electrons at high pressure. It is assumed that the lattice contribution to the pressure is small and that the equation of state of the solid can be approximated by results of the statistical Thomas-Fermi atom model for the electron pressure.
Date: April 11, 1955
Creator: Gilvarry, J. J. (John James), 1917-
Item Type: Refine your search to only Report
open access

A Method for Monochromatizating and Precise Point Focusing of X-Rays and its Application in Low Angle Diffraction Studies

Description: A principle for bending crystals with a minimum of strain so that they will focus x-rays and gamma-rays accurately to a point is explained. Detailed calculations are made of the aberrations in the foci resulting from various applications of the principle. the application of the principle in making a point focusing monochromator for low angle x-ray diffraction studies is discussed, and theoretical and experimental determinations of the reflection coefficient of the crystal are compared. A few ex… more
Date: April 1955
Creator: Berreman, Dwight Winton
Item Type: Refine your search to only Report
open access

Aerosol Collection by Wetted Fiberglass Media

Description: A wet collection system for aerosols has been developed using fibrous media. Tests show the performance to be in accord with recently developed theory of collection by fibrous media. The effects of varying aerosol particle size, particle density, and gas velocity have indicated that inertial impaction is the primary collection mechanism. Three-year operating experience on several full scale plant installations shows reliable performance.
Date: April 28, 1954
Creator: Leary, Joseph A.; Clark, Robert A.; Hammond, R. Philip & Leopold, Charles S.
Item Type: Refine your search to only Report
Back to Top of Screen