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Single crystalline elastic constants of the MgCu/sub 2/-MgZn/sub 2/ system

Description: The adiabatic single crystalline elastic constants of six Mg(Cu, Zn)/sub 2/ cubic Laves phases have been determined by the ultrasonic pulse-echo technique over the compositional range 10 to 50 mol % MgZn/sub 2/ and over the temperature range 4.2 to 300/sup 0/K. In addition the elastic constants of the hexagonal MgZn/sub 2/ Laves phase were measured as a function of temperature. A minimum exists in the compositional dependence of the cubic Mg(Cu, Zn)/sub 2/ phase at 20 mol % MgZn/sub 2/ for all … more
Date: November 1968
Creator: Shannette, Gary Wayne
Partner: UNT Libraries Government Documents Department
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Differential Distributions of Neutrons in Inelastic π$sup -$P Interactions at 374, 417, and 454 Mev

Description: The inelastic interactions of negative pi mesons with protons at 374, 417, and 454 Mev incident pi kinetic energy are studied by measuring the differential distributions of finalstate neutrons. The pi source is an internal target of the Berkeley 184-inch synchrocyclotron. A magnetic beamtransport system momentum-anaiyzes and focuses the pi beam at a liquid hydrogen target located in an adjacent shielded experimental area. The time-of- flight distribution of neutral particles is measured at vari… more
Date: November 15, 1962
Creator: Kurz, R. J.
Partner: UNT Libraries Government Documents Department
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Nuclear Reactions Induced by Pions and Protons

Description: Effects due to elementary particle-like collisions within nuclear matter have been observed in several nuclear reactions caused by pions and protons. Simple nuclear reactions of the form ZA(a,an)Z/sup A-1/ and Z/sup A/(a,ap)(Z-1)/ sup A-1/ have excitation functions that are sensitive to changes in the elementary-particle cross sections. The excitation function for the reaction C/ sup 12/( pi /sup -/, pi /sup -/n)C/sup 11/ is measure d from 53 to 1610 Mev by bombarding targets of plastic scintil… more
Date: November 27, 1962
Creator: Reeder, P. L.
Partner: UNT Libraries Government Documents Department
open access

Cycling of Cesium-134 in White Oak Trees on Sites of Contrasting Soil Type and Moisture

Description: The cycle of cesium-134 (2 mu c) in white oak trees on four sites differing soil type and moisture was followed. Gains, losses, and transfers were estimated by sampling from inoculated trees, understory, litter, and soil. With rapid translocation into leaves from initial trunk inoculations in the spring, white oak leaves contained 10/sup 5/ to 10/sup 6/ dpm per g dry weight by early June. This represented a total transfer of about 40% of the original input. From rains, loss from leaves continue… more
Date: November 1, 1962
Creator: Witherspoon, J. P., Jr.; Auerbach, S. I. & Olson, J. S.
Partner: UNT Libraries Government Documents Department
open access

Transport Solutions to the Monoenergetic Critical Problems

Description: Transport solutions to the monoenergetic plane, spherical, and cylindrical critical problems with isotropic scattering are developed by the method of singular expansion modes. The results are given in the form of exact expressions for the neutron distributions and criticality conditions. These expressions depend on expansion coefficients that are shown to satisfy Fredholm integral equations of the second kind. Successive approximations on the coefficients lead to the asymptotic results of diffu… more
Date: November 1, 1963
Creator: Mitsis, G. J.
Partner: UNT Libraries Government Documents Department
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