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Some X-Ray and Fast Neutron Response Characteristics of Silver Metaphosphate Glass Dosimeters

Description: A study was conducted to determine the adequacy of silver metaphosphate glass as a dosimeter for gamma radiation coexistent with fast neutrons. The fast-neutron response in the energy region encompassing a major pcrtion of the fission spectrum was determined and a method of decreasing the photon-energy dependence was developed. The size of the dosimeter and reprcducibility of results make this system a useful addition to gamma -ray dosimetry. particularly for gamma rays coexistent with neutrons… more
Date: September 1, 1960
Creator: Thornton, W. T. & Auxier, J. A.
Partner: UNT Libraries Government Documents Department
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Longitudinal Dispersion in Beds of Finely Divided Solids

Description: Experimental determinations of the longitudinal dispersion coefficient and the Peclet number were made for three binary gas systems. The experimental technique involved measuring the dispersion of a step function input to a column packed with glass beads. The diffusional model was employed to obtain the differential equation describing longitudinal dispersion in a packed column. This equation was solved with suitable boundary conditions, and the solution was used in the analysis of the experime… more
Date: June 1, 1960
Creator: Robinson, J. M.
Partner: UNT Libraries Government Documents Department
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The Two-Pion Exchange Contribution to the Higher Partial Waves of Nucleon- Nucleon Scattering

Description: By means of the Mandelstam representation, expressions are obtained for the two-pion-exchange contributions to the higher partial waves of N-N scattering. A set of ten invariant amplitudes is selected, of which each member obeys the Mandelstam representation. Dispersion relations are written for the amplitudes in which the discontinuities are absorptive parts for N-bar-N scattering. By means of the unitarity condition the absorptive parts are expressed as a partial- wave expansion in terms of t… more
Date: June 1, 1960
Creator: Cziffra, P.
Partner: UNT Libraries Government Documents Department
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The Molecular and Viscous Effusion of Saturated Vapors

Description: An investigation of the effusive behavior of saturated vapors over a range of source pressures from 10/sup -6/ atm in the molecular flow region to 1 atm is reported. The purposes of the investigation were to clarify the situation regarding the upper pressure limit to effusive flow, to examine the transition of effusive flow from molecular to viscous behavior, and to clarify some limited aspects concerning the question of vapor saturation within an effusion cell. Mass flow rates of mercury vapor… more
Date: April 1, 1960
Creator: Carlson, K. D.
Partner: UNT Libraries Government Documents Department
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Neutron Flux Distributions in Natural Uranium Tubes

Description: Measurements were made in the Process Revelopment Pile (PDP) of the distribution of the thermal neutron flux in ten different D/sub 2/O-moderated lattices of natural uranium tubes. Both single and double fuel tubes were used at lattice spacings of 7 and 14 inches. Special corrections were required for epithermal flux shielding by the manganese detector foils. After these corrections were applied, good agreement was obtained between the measured flux distributions and correspending distributions… more
Date: March 1, 1960
Creator: Ponder, T. B.
Partner: UNT Libraries Government Documents Department
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Fractional Crystallization From Melts

Description: S>Studies of the separation process known as zone melting were enclosed in 5 to 10 mm glass tubes and pulled through a stationary heater, which generated a liquid zone. The separation increased as the zone travel rate decreased, as the size of the tube increased, and as the difference in liquid density between the belk solid and the freezing interface increased. It was also found that, for vertical tubes, the separation was much greater when the fluid of lower density Between the buld zone and … more
Date: June 1, 1960
Creator: Wilcox, W. R.
Partner: UNT Libraries Government Documents Department
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Dissociation of Molecular Ions by Electric Fields [Part 2]

Description: The reactions pi /sup -/ + p yields p + p + n and pi /sup -/ + p yields p + d were investigated. The calculations are based on thirdorder perturbation theory with pseudoscalar coupling between nucleons and pions and with a phenomenological treatment of the nucleon-nucleon interaction in the final state. The final-state interactions of the antinucleon are neglected. Cross sections are given in graphical form for the reactions and for trsnsitions between eigenstates of isotopic spin. The final-st… more
Date: May 1, 1960
Creator: Hiskes, J. R.
Partner: UNT Libraries Government Documents Department
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Interactions of Antiprotons in Hydrogen, Beryllium, and Carbon

Description: To determine the nature of the interactions between antinucleons and nucleons, it has been necessary to do an experiment in which the elastic, inelastic, and charge-exchange interactions could be measured. Improvements in the 6-Bev Bevatron have permitted production of a considerably larger flux of antiprotons, than was available in earlier studies. With the use of strong-focusing magnetic quadrupoles, a crossed electric- and magnetic-field spectrometer, and time-of-flight scintillation counter… more
Date: March 1, 1960
Creator: Cork, Bruce
Partner: UNT Libraries Government Documents Department
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