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Theory of Alpha Decay

Description: The relationship between nuclear reactions and nuclear decay derived by F. T. Smith is presented and illustrated by a simple example. (auth)
Date: August 1, 1962
Creator: Tobocman, W.
Partner: UNT Libraries Government Documents Department
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Theory of Final State Interactions

Description: Using requirements of analyticity and the unitarity of the S-matrix we obtain the dependence of a transition amplitude on the invariant mass of two particles strongly coupled to other two particle channels. As an example, we consider the production of a Σπ state near the Y*₀ resonance assuming it is coupled to a KN state in an s 1/2 state.
Date: August 20, 1962
Creator: Nauenberg, Michael
Partner: UNT Libraries Government Documents Department
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A Thermal Comparator Apparatus for Thermal Conductivity Measurements from 50 to 400 [degrees] C

Description: The experimental details, mathematical models, and typical data for a rapid comparative method for thermal conductivity measurements are presented. The method consists of measuring the temperature change of a small silver sphere after it is brought in contact with a small disk-shaped specimen which was initially at ta higher temperature. This temperature change was calibrated in the range of 50 to 400 degrees C by making measurements on samples of know thermal conductivity. The accuracy of this… more
Date: August 11, 1964
Creator: Kollie, T. G.; McElroy, D. L.; Graves, R. S. & Fulkerson, W.
Partner: UNT Libraries Government Documents Department
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THERMAL DESIGN OF THE MGCR CORE

Description: The design information is presented in sections on core thermal performance, fuel elements, moderator, and control rods. (J.R.D.)
Date: August 1, 1960
Creator: Rogers, J.T. & Katz, R.
Partner: UNT Libraries Government Documents Department
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The Thermal Expansion of Five Titanium Carbide Cermets from 68 to 1800F

Description: This technical report presents measurements of the thermal expansion of five titanium carbide type cermets from 68 to 1800F. These cermets are designated by Kennametal, Inc., as K 138A, K 150A, K 152B and K 162B. They contain from 64 to 80 weight percent titanium carbide, 10 to 30 weight percent metal binder and 6 to 10 weight percent other carbides. The metal binders are cobalt, nickel, and nickel and molybdenum. An attempt was made to calculate the thermal expansion of each type cermet fr… more
Date: August 17, 1962
Creator: Harrington, L. C. & Rowe, G. H.
Partner: UNT Libraries Government Documents Department
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Thermal Properties of Grade CGB Graphite

Description: Grade CGB graphite is a nuclear graphite which is basically an extruded petroleum coke bonded with coal tar pitch. No carbon blacks are used and the low-permeation graphite is finished through a series of impregnations and heat treatments with a final heat treatment of all components to 2800 degrees C. A listing of the results obtained is given in Table 1. The results at 51 degrees C are considered questionable. There was a slight contamination of the 90% Pt 10% Rh-Pt thermocouples at 910 degre… more
Date: August 11, 1964
Creator: Moore, J. P. & Godfrey, T. G.
Partner: UNT Libraries Government Documents Department
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Thermal Stress Testing of Beryllium Oxide Moderator Shapes

Description: Abstract: Perforated BeO plates were thermal shock tested to evaluate the effect of: (1) localized temperature variations adjacent to the perforations, and (2) radial gradients across the entire plate.
Date: August 1, 1962
Creator: Sujata, H. L.; King, M. & Waters, F. J.
Partner: UNT Libraries Government Documents Department
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Thermal Studies Hastelloy X Metallic Insulation

Description: Hastelloy X wire wool has been considered by the Architect Engineer for exterior thermal insulation of some pipe sections of the ATR* gas loop. Heart transfer studies were made simulating gas loop operating conditions. This report describes the apparatus used and the resultant data. The insulation (manufactured by a commercial supplier) is of interest because of its corrosion resistance, strength, and ability to withstand impact and abrasion. Also, it is not a source of chlorides. The insulatio… more
Date: August 1, 1965
Creator: Hickerson, JP
Partner: UNT Libraries Government Documents Department
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Thermally Activated Dislocation Motion in FCC and Refractory BCC Metals

Description: Amplitude-dependent internal friction evidence is presented which demonstrates the strong differences in dislocation mobility which exist between the two classes of cubic metals: the face-centered cubic, represented by Al and Cu, and the body-centered cubic, represented by Ta, Nb, Mo, and W. Amplitude- dependent internal friction due to dislocation motion results from the hysteretic unpinning and repinning of dislocation loops from impurity pinning points when the oscillating measuring stress e… more
Date: August 12, 1962
Creator: Chambers, R. H.
Partner: UNT Libraries Government Documents Department
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THERMIONIC CONVERTERS FOR COMPACT NUCLEAR POWER PLANTS

Description: A brief review of several thermionic nuclear power plants leads to the conclusion that the in-core concept is the most practical and useful system for space applications. Fundamental considerations indicate that emitter temperatures from 1500 to 1900 deg C are required for this concept, and that the high work function refractory metals are the best electrode materials for achieving the required performance and lifetime at these temperatures. The analytical and experimental technology developed … more
Date: August 1, 1962
Creator: Rasor, N.S. & Weeks, C.C.
Partner: UNT Libraries Government Documents Department
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Thermodynamic and Related Properties of Parahydrogen From the Triple Point to 100 K at Pressures to 340 Atmospheres

Description: From Introduction: "In the present report, therefore, polynomials representing isotherms and isochores are combined with numerical methods of computation for the purpose of improving accuracy, in particular for the derivatives of the P-p-T surface."
Date: August 10, 1965
Creator: Roder, H. M.; Weber, L. A. & Goodwin, R. D.
Partner: UNT Libraries Government Documents Department
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Thermoelectric Materials. Final Report, January 28, 1959-July 28, 1960

Description: BS> A method for the measurement of thermal conductivities of electrically conducting materials at temperatures in excess of 1000 deg C with a high accuracy was devised. The spatial boron concentration gradient in boron- doped graphite to achieve maximum p-type thermoelectric output was established. The production of an n-type silicon carbide-graphite composit was studied. Theoretical studies produced a detailed picture of the effect of doping on the electronic properties of graphite. A method … more
Date: August 15, 1960
Creator: Brechenridge, R. G.
Partner: UNT Libraries Government Documents Department
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THERMONUCLEAR DIVISION SEMIANNUAL PROGRESS REPORT FOR PERIOD ENDING APRIL 30, 1963

Description: Progress in various aspects of thermonuclear research is reported. Separate abstracts were prepared for ten of the twelve sections of the report. Design and engineering service notes and a report list are given in the remaining sections. (D.C.W.)
Date: August 1, 1963
Partner: UNT Libraries Government Documents Department
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Thickness of Bituminous Coal and Lignite Seams Mined in 1965

Description: Report issued by the Bureau of Mines discussing the thickness of coal seams mined in the United States between 1945 and 1965. Locations, and production of coal seams are presented. This report includes tables.
Date: August 1967
Creator: Young, W. H.
Partner: UNT Libraries Government Documents Department
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Through-reactor flow calculated from high tank-high velocity flush data

Description: To satisfy reactor coolant supply criteria requires a knowledge of available emergency flow rates from secondary and last-ditch systems. This document presents a method for calculating high-tank flow contribution to the last-ditch coolant system from routine high tank-high velocity flush data. The measured flush flow is converted to equivalent through-reactor flow at 20 C and at the critical time of high-tank takeover from flywheel decay.
Date: August 20, 1964
Creator: Morrissey, J. E.
Partner: UNT Libraries Government Documents Department
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Tory II-C program: introduction and general description

Description: Declassified 26 Nov 1973.<><DSN>29:026171<ABS>The rotating fluidized bed reactor concept is outlined and its application to rocket propulsion discussed. Experimental results obtained indicate that minimum fluidization correlations commonly in use for 1-g beds can also be applied to multiple-g beds. It was found that for a low thrust system STA90,000N (20,000 lbf)! the fuel particle size and/or particle stress play a limiting role on performance. The superiority of /sup 233/U as a fuel for this … more
Date: August 21, 1962
Creator: Goldberg, E.
Partner: UNT Libraries Government Documents Department
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Transistorised Temperature Controller A.A.E.C. Type 30

Description: This manual gives a description, operating instructions, circuit diagram and parts list of Transistorised Temperature Controller type 30 designed in the laboratories of the Australian Atomic Energy Commission.
Date: August 1963
Creator: {{{name}}}
Partner: UNT Libraries Government Documents Department
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A TRANSISTORIZED ALPHA COUNTER FOR AN ALPHA GAUGE

Description: A transistorized instrument prototype was designed and constructed to replace a vacuum-tube instrument in an alpha gauge, which measures the thickness density of gases. The instrument amplifies, shapes, discriminates, and counts alpha pulses from a Au-Si surface-barrier detector exposed to an alpha source in a gas-filled chamber. The circuit consists of a charge-sensitive preamplifier, a main amplifier with pulse clipping, a Schmitt trigger, a diode pump, and a count rate meter. Preliminary tes… more
Date: August 23, 1962
Creator: Kopp, M.C.
Partner: UNT Libraries Government Documents Department
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