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The Resonance Absorption Spectrum of Uranium

Description: A model for the capture spectrum of uranium is introduced in which levels occur at 7, 30, 30+D, 30+2D, ..., ev. Gamma ray and neutron widths are derived from the experimental data for values of D between 10 and 25 ev. The constants of the 7 volt level prove to be independent of D. Extrapolation, using the one level formula, gives a capture cross section at (1/40) ev of 4.9 x 10(24) cm2; this number is, however, quite sensitive to the value taken for the resonance activation. Both neutron and ga… more
Date: November 24, 1943
Creator: Dancoff, Sidney M., 1913-1951
Partner: UNT Libraries Government Documents Department
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Temperatures on the Surface of a Slug Jacket

Description: Prior to operating a chain reacting, graphite moderated, water cooled uranium pile at Hanford, the corrosive action of water on uranium was studied. It was necessary to enclose the uranium cylinders in Al jackets. Preliminary data were available which indicated Al jacket corrosion might be influenced by the water temperature. Therefore, in order to specify safe operating conditions, it was desirable to know the temperature at any position on the Al jacket of a slug in the tube. Because of the e… more
Date: November 1, 1944
Creator: Monet, M.
Partner: UNT Libraries Government Documents Department
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Progress Report : Low Geometry Alpha Particle Ionization Chambers

Description: ABSTRACT. When solutions of high specific alpha activity are to be assayed for product, it is often difficult to obtain reproducible results by diluting the solution sufficiently to remove a small volume from which a sample can be prepared and counted at 52% geometry. In order to assay such a solution, most reproducible results have been obtained with minimum effort in sample preparation by making use of low geometry chambers. Two types of low geometry chambers are described: 1) The air-screen … more
Date: November 8, 1944
Creator: Borokowski, C. J.; East, J. K. & Flatau, C.
Partner: UNT Libraries Government Documents Department
open access

Slug Jacket Temperatures

Description: Abstract. A method for calculating jacket temperatures in a region of varying heat transfer coefficients is given Some applications are made for temperatures above a supporting rib.
Date: November 8, 1944
Creator: Schlegel, Richard, 1913-
Partner: UNT Libraries Government Documents Department
open access

Thermal Transfer to an Annular Water Stream in the Neighborhood of a Rib

Description: Abstract. Steady-state temperatures were measured in an electrically heated brass cylinder which was water cooled in a four-ribbed Al tube. Thermal transfer coefficients h were calculated from the measured temperatures. Curves of h values are presented for the regions of high and low ribs. the h curve is found to show a much sharper break in the region of high rib than in a low rib region. There is some evidence that h decreases linearly with annular thickness in the range considered. The low r… more
Date: November 10, 1944
Creator: Kratz, H. R.; Schlegel, R. & Christ, Carl F.
Partner: UNT Libraries Government Documents Department
open access

Final Report on Swell Detection by Pusher Method

Description: Experiments wee performed to evaluate the feasibility of detecting swelled slug elements in Hanford reactors by measuring the force necessary to push the slug column in its tube. These experiments are described. The results indicate the method presents no unsolvable problems.
Date: November 11, 1944
Creator: Shank, W. Bradford & Frankel, W.
Partner: UNT Libraries Government Documents Department
open access

A Sensitive Particle Ionization Chamber for Neutron Detection

Description: Abstract. A particle ionization chamber of sensitivity sufficient to detect a source of one neutron per second has been used to measure the neutron yield from a thick target of sulfur upon bombardment with polonium alpha particles. The high-geometry boron trifluoride chamber used had an efficiency of 1.9 percent for fission neutrons. The neutron yield from a thick target of sulfur was measured by this instrument and found to be .0035 +- .0013 neutrons per million incident polonium alpha particl… more
Date: November 21, 1944
Creator: Sturm, William J. & Dabbs, John
Partner: UNT Libraries Government Documents Department
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