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Maneuvering Horizontal Tail Loads

Description: Report describing a study to develop an acceptable method for calculating the magnitude, direction, and distribution of the maneuvering horizontal tail load. The simplified method identified is outlined and evidence is provided to demonstrate the method's accuracy. Variation of the maneuvering tail load is discussed for changes in altitude, speed, pitching inertia, and longitudinal stability. Appendices present solutions of the equations of motion in which all the stability derivatives are incl… more
Date: January 25, 1945
Creator: Kelley, Joseph, Jr. & Missall, John W.
Partner: UNT Libraries Government Documents Department
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Cloud-Chamber Effect in Large Explosions

Description: Report discussing the atmospheric conditions under which a cloud of water droplets will form when an atomic bomb or a large amount of TNT is detonated. A theoretical discussion of the conditions is presented followed by a discussion of two experimental verifications of the theory, including the July 16, 1945 nuclear test at the Trinity site in New Mexico. (Abstract)
Date: November 27, 1945
Creator: Reines, Frederick
Location: 33.677333 -106.475403
Partner: UNT Libraries Government Documents Department
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Delayed Neutrons from [Uranium-235] After Short Irradiation

Description: Report discussing the decay curve of delayed neurons from U²³⁵ after very short neutron irradiation of about 10-milliseconds in duration following a drop experiment that resulted in the production of a neutron burst. The experiment arrangements and results are presented in graphical and narrative form. Tables and graphs plot measurement of decay from 0.2 seconds to 10 minutes following the drop.
Date: April 6, 1945
Creator: De Hoffmann, F.
Partner: UNT Libraries Government Documents Department
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Comments on the Urine Analysis Results on Clinton Laboratories Personnel as Reported by Chicago

Description: At your request, I have mode a few comments on the possible variations in the urine analysis results based only on considerations of counting. I feel that I am not yet in a position to criticize the results with respect to possible variations which could be introduced by contamination, type of analysis procedure, technique, etc. In general, it can be said that the several highly improbable instances pointed out in this report make some of the results questionable. In view of the recent report t… more
Date: June 12, 1945
Creator: English, S. G.
Partner: UNT Libraries Government Documents Department
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Relative and Absolute Yield from Antimony and Lanthanum Photoneutron Sources

Description: Preliminary data are tabulated on photoneutron yields of beryllium when irradiated by gamma rays from Sb124 and La 140. The results show that for equivalent total gamma strength the antimony produces 47 times as many photoneutrons as the lanthanum, while for equivalent millicurie strength the antimony produces 200 times as many photoneutrons as the lanthanum.
Date: February 6, 1945
Creator: Snell, A. H.
Partner: UNT Libraries Government Documents Department
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A Note on the Kinetics of Homogeneous Piles

Description: Abstract. In investigating stability of a homogeneous pile it has been customary to assume that the production of bubbles follows the production of power instantaneously. Here we investigate the implications of introduction of an intermediate dissolved gas stage under two hypotheses on the formation of bubbles from this dissolved gas. It is seen that this additional stage tends to make the pile unstable.
Date: June 26, 1945
Creator: Wilkins, J. Ernest, Jr., 1923-2011
Partner: UNT Libraries Government Documents Department
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The Stopping Power of Metals

Description: Summary. The effect of the conduction electrons on the stopping power of metals has been considered from two essentially different points of view. No numerical calculations have been carried out, because we have found no completely satisfactory was of computing Z'e, the effective charge on the moving ion. A rather crude estimate made on the basis of the Thomas-Fermi atomic model indicates that Z'2/E is roughly constant. Using this relation one finds that the stopping power of the conduction ele… more
Date: July 2, 1945
Creator: Goldberger, Marvin L.
Partner: UNT Libraries Government Documents Department
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The Hall Effect in Neutron Irradiated and Annealed Graphite

Description: Abstract. Irradiated Whiting graphite possesses a small negative or a positive Hall constant, depending upon the dosage. Annealing at 500 degrees C for 1 hour in helium results in a Hall constant which is large in magnitude and negative in sign. The properties of the annealed graphite are presumably close to those of the original unirradiated material. Unirradiated AGOT-K graphite has a large, negative Hall constant. A mechanism is suggested which accounts for the change in sign of the Hall con… more
Date: April 18, 1945
Creator: Maurer, Robert J. & Ruder, Richard C.
Partner: UNT Libraries Government Documents Department
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Theory of Oscillating Absorber in a Chain Reacting Pile

Description: Abstract. the fluctuation in pile intensity caused by an oscillating point absorber is calculation. It is found that the nature of the response depends on the frequency of the impressed oscillation. If the frequency is high compared to the decay rate of the high harmonics, the response consists of a wave which is propagated away from the oscillator. If the frequency is low, the propagated wave character of the response disappears and the intensity of the whole pile tends to oscillate with the s… more
Date: April 6, 1945
Creator: Cahn, Albert S., Jr.; Monk, A. T. & Weinberg, Alvin Martin, 1915-2006
Partner: UNT Libraries Government Documents Department
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Solubility and Diffusion Constants for Gases

Description: The solubility constants are presented for He , Kr , Xe , O2 , N2 , and air in H20 . Inter-diffusion constants for gases and the diffusion of gases in water are given.
Date: April 9, 1945
Creator: Schlegel, Richard
Partner: UNT Libraries Government Documents Department
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The Effect of Thermal Cycling on the Thermal Transfer from a Sand Blasted Slug to an Unbonded Jacket

Description: Abstract. Measurements were made to determine the effect of thermal cycling on heat transfer from slug to jack using a slug with a sand blasted surface. The value of the transfer coefficient h decreased from initial values ranging from 10 to [formula], to values and [formula] after 1700 cycles, and to a range of 0.15 to 0.45 [formula] after 3200 cycles. Comparisons are made with the results found for slugs with different surfaces.
Date: April 2, 1945
Creator: Bentley, Robert R.
Partner: UNT Libraries Government Documents Department
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Pile Heat Exchanger Calculations

Description: Abstract. Some idealized calculations (CP-807) relating to the design of heat exchangers for minimum holdup of pile liquid are presented in compact form to facilitate quick estimates. Their use is illustrated by application to a falling film type exchanger.
Date: February 14, 1945
Creator: Young, Gale Jay
Partner: UNT Libraries Government Documents Department
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The Digging-in of a Warped Rod Into a Rib

Description: Abstract. Some rather idealized considerations are given regarding the depth a warped rod presses into the ribs at the places of contact. It appears that this distance may, under some conditions, be of the order of 70 times greater than for a straight rod resting uniformly on the ribs.
Date: January 22, 1945
Creator: Martin, A. V.
Partner: UNT Libraries Government Documents Department
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Estimates of the Maximum Surface Temperature for a Slug Displaced from the Center of the Tube

Description: When a slug has been displaced from its normal position the thickness of the water film is decreased over part of the surface, and higher temperatures may be expected where the film is thin. The experimental data necessary for an exact calculation is incomplete, but some approximate estimates ae made here with special assumption concerning the heat transfer coefficient h as a function of the angle p from the point where the water film is thinnest. Variation in water bulk temperature around the … more
Date: January 9, 1945
Creator: Murray, F. H.
Partner: UNT Libraries Government Documents Department
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A Study of Thorium Peroxide Sulfate

Description: Abstract. Thorium peroxide was precipitated from thorium nitrate solutions containing varying amounts of sulfate ion and of hydrogen ion. The washed solids were analyzed both wet and dry. Analyses were made for thorium, peroxide oxygen, sulfate, nitrate, and water contents. X-ray powder photographs of the dried samples by W.H. Zachariasen showed the presence of only two phases. When precipitated from high sulfuric acid, the solid phase was isomorphous with Th(OO)SO4.3H20. More weakly acid … more
Date: October 1, 1945
Creator: Hamaker, John W.
Partner: UNT Libraries Government Documents Department
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Composition and Thermal Decomposition of Uranyl Peroxide

Description: Technical report on the studies that have been made on the composition and thermal decomposition of uranyl peroxide. The conditions of precipitation and drying have been found to have no appreciable effect on the composition of the compound, but do affect the physical appearance of the precipitate and the rate of thermal decomposition. The UO4 + 2H2O appears to be thermodynamically unstable with respect to UO3 at 25 degrees C and atmospheric pressure, although the rate of conversion is extreme… more
Date: June 30, 1945
Creator: Leininger, R. F.; Hunt, J. P. & Koshland, D. E., Jr.
Partner: UNT Libraries Government Documents Department
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The Determination of Thorium in Uranium-Thorium Alloys, Using Cupferron

Description: Technical report describing that the use of controlled amounts of carbonate, acting both as complexing agent buffer led to a fairly satisfactory procedure for the determination of Th in Th-U alloys, using cupferron. The alloy, dissolved in NHO2, in the presence of HF, is treated with H2SO4 and the mixture is evaporated in SO2 fumes. The solution is diluted and (NH4)2CO2 is added. Th is precipitated from this solution with cupferron. The precipitate is weighed as ThO2 after ignition. An accura… more
Date: November 23, 1945
Creator: Eckert, A. C. & Bane, R. W.
Partner: UNT Libraries Government Documents Department
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Recovery of D2O and UO2F2 by Distillation

Description: Technical report describing the purification and separation by distillation of UO2F2 from D2O. In the experiment which is discussed 2,129.6 lbs of UO2F2 were dissolved in 6,605 lbs of D2O. The average isotopic purity of the D2O decreased during the distillation from 99.77% to 99.73%. The dissolved impurities were less than those present originally in the heavy water.
Date: October 10, 1945
Creator: Fischer, R. & Wattenberg, Albert, 1917-
Partner: UNT Libraries Government Documents Department
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