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The Spectrographic Analysis of Beryllium and its Compounds
Abstract. Spectrographic procedures for determining small amounts of the common contaminants in beryllium and its compounds are described. Suggestions relative to the preparation of synthetic standards are also given.
Date:
June 22, 1945
Creator:
Smith, A. Lee (Albert Lee), 1924-
System:
The UNT Digital Library
A Study of the Mechanism of Radiation Induced Gelation in Monomer-Polymer Mixtures
"Additional mixtures of polymers and multi-unsaturated monomers have been prepared, irradiated and the gel content determined. The gel content determination of crosslinked polyolefins has been investigated in detail. The multi-unsaturated monomers used and radiation conditions applied up to this time have not given significant gel contents for polypropylene. the polypropylene resin used has been characterized by differential extraction."
Date:
November 22, 1960
Creator:
unknown
System:
The UNT Digital Library
Summary of Airborne Radiometric Surveying in the Bighorn Basin, Wyoming and Montana
Summary of airborne radiometric surveys of certain sediments in Bighorn Basin, Wyoming, and Montana
Date:
November 22, 1971
Creator:
Brooke, Gerald L.
System:
The UNT Digital Library
Summary of the Research Progress Meeting
Technical report includes three reports of research progress: 1) Range Measurements on 190 Mev Deuterons, M. Stephan; 2) Meson measurements, C. Lattes; and 3) N-P Scattering, R. Christian.
Date:
April 22, 1948
Creator:
Wakerling, R. K. (Raymond Kornelious), 1914-
System:
The UNT Digital Library
Two Stage Leaching Tests on Utex Ore
Introduction: The object of this test work was to determine the practicability of a two-stage leach using ion-exchange as the method of uranium concentration.
Date:
July 22, 1954
Creator:
Stanley, Alan; Eisenhauer, Robert & Richardson, Stanley
System:
The UNT Digital Library
U-235 Critical Mass Dependence on Moderation
Introduction: "Based on experimental data and on conservative theoretical considerations, an estimate has been made of the relation of the mining U-235 critical mass to the hydrogen moderation for uranium material at the U-235 assays for which experimental information is available. These estimates have been used in indicating maximum safe amounts for conditions where definite moderation limitations can be established."
Date:
September 22, 1952
Creator:
Callihan, A. D.; Henry, Hugh F. & Macklin, R. L.
System:
The UNT Digital Library
Weighted Least-Square Polynomial Approximation to a Continuous Function of a Single Variable
Report describing a method of fitting "a weighted least square polynomial of order n to a set of m observation points" in order "to satisfy the need for a general curve fitting scheme" (p. 1).
Date:
May 22, 1956
Creator:
Von Holdt, Richard E. & Brousseau, Robert J.
System:
The UNT Digital Library
Wet Fluoride Studies: Calcium Plutonium (IV) Fluoride
Laboratory studies have shown that the double salt, CaF2-PuF4, can be precipitated by rapid addition of hydro-fluoric acid to solutions containing 25 to 75 g Pu/1, caleium equimolar to plutonium, and 1 to 10 M HNO3. The precipitate, which is subsequently washed with water and dried to 300 degrees C in dehumidified, deoxygenated argon, can be reduced thermally by calcium to give high yields of plutonium metal.
Date:
December 22, 1953
Creator:
Branin, P. B.
System:
The UNT Digital Library
The X-Ray Spectra of the Last-Row Elements
Abstract: X-ray energy level diagrams as given in the literature are tabulated for radium, thorium and uranium. A level scheme for protoactinium is derived from the published data. After a brief review of the use of X-ray data in studying outer electronic structure, it is pointed out that differences in the X-ray spectra should exist depending on whether the outer electrons are in f or d orbitals. The observed separation of the OI and OII levels in thorium and uranium indicated that the f levels lie lower than the d. This hypothesis also provides a reasonable explanation for the observed differences between the MIV and MV absorption edges and MIV and MV levels calculated from the emission spectra and the LIII edge.
Date:
October 22, 1946
Creator:
Russell, H., Jr.
System:
The UNT Digital Library