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A Determination of the U-235 Content in Highly Impoverished Material

Description: Introduction: "The product of a special run made in XAX was submitted to the Assay Department for a determination of the residual content of the 235 isotope. The charge material on this run was impoverished, with a ratio of approximately 1:2,000. The sample was submitted in the form of purified T3O8."
Date: 1946
Creator: Cameron, A. E. & Hibbs, Roger F.
Partner: UNT Libraries Government Documents Department

Isotopes of Neptunium and Plutonium

Description: This report describes work done that originated in an effort to identify previously unknown isotopes of neptunium and plutonium and to characterize a few that were known for extension of the nuclear energy surface. The findings of this work results in two new light plutonium isotopes and one heavy neptunium isotope that were produced by bombardment of uranium with helium and deuteron ions from a 60-inch cyclotron and a 184-inch cyclotron. The chemical and experimental methods are described as well as the results of the bombardment work for each nuclide.
Date: December 1950
Creator: Orth, Donald Alfred
Partner: UNT Libraries Government Documents Department

The Isotopic Composition of Trace Quantities of Lead and Calcium

Description: The following report discusses development of new micro-chemical and micro-mas spectrometric techniques for handling trace quantities of lead. The first two sections of this report summarizes the development and trial application to mineral separates of a granite rock. The third section summarizes similar techniques developed for the determination of calcium, and gives the results of an application of the technique to the determination of the radioactive decay constants of K-40.
Date: 1951
Creator: Patterson, Claire
Partner: UNT Libraries Government Documents Department

General Report of Stable Isotope Separation

Description: Abstract: "The Calutron has been successfully employed to separate the stable isotopes of twenty-one elements. The standard Beta M-2 unit modified to handle charge materials of various temperature ranges has proven adequate for a majority of separations. The problem of K life has received considerable attention but is still to be solved. Other operational problems are similar in most respects to those of uranium. The E design has, of necessity, varied greatly from the "Beta Gloria" type. A desire to keep construction simple, yet adequate for efficient collection and readily adaptable for use with many elements, has dictated the trend in E design. Water cooling on the receiver pockets was necessary with many of the elements separated. The chemical purification of the separated samples, although following a general pattern, varies with the type of pockets used and the element collected."
Date: January 20, 1947
Creator: Ketler, W. R.; Chelius, L. G. & Keim, C. P.
Partner: UNT Libraries Government Documents Department

Preliminary Data on Fallout From the Fall 1961 USSR Test Series: Staff Report

Description: From introduction: "Following the USSR announcement of its intention to resume testing, arrangements were made for the three stations collecting individual rainfall samples to begin analyses for short-lived nuclides. Some of the data are now available and are reported here." From Data: "The available data, including samples for Houston, Texas and Louisville, Kentucky are given in the tables at the end of this report."
Date: February 27, 1962
Creator: U.S. Atomic Energy Commission. Health and Safety Laboratory.
Partner: UNT Libraries Government Documents Department

The [beta]-Spectra of Pu²³⁹, Pu²⁴⁰, Pu²⁴¹and Sm¹⁵¹

Description: The [beta] spectrum of the 10-year Pu²⁴¹ was run on a sample of radiochemically pure plutonium containing the isotopes Pu²³⁹, Pu²⁴⁰, Pu²⁴¹, isotopically enriched in Pu²⁴¹ by pile neutron irradiation. The isotopic composition was determined mass spectrographically.
Date: February 8, 1952
Creator: Wagner, F.; Freedman, Melvin S. & Engelkemeir, D. W.
Partner: UNT Libraries Government Documents Department

Independent and Relative Yields of I¹³¹, I¹³², I¹³³, I¹³⁴, and I¹³⁵ Formed in Fission of U²³⁵ by 14-Mev and Thermal Neutrons

Description: Abstract: "The following results were derived from experiments in which iodine was quickly separated from irradiated uranium metal at a known time after irradiation. The fractional chain yields are based on the cumulative chain yields at iodine."
Date: 1954
Creator: Wahl, Arthur C.
Partner: UNT Libraries Government Documents Department

Dry season limnological conditions and basin geology exhibit complex relationships with δ¹³C and δ¹⁵N of carbon sources in four Neotropical floodplains

Description: This article assesses the potential for basin geology and local limnological conditions to predict stable carbon and nitrogen isotope values of six carbon sources at multiple locations in four Neotropical floodplain ecosystems (Paranaá , Pantanal, Araguaia, and Amazon).
Date: March 30, 2017
Creator: Alves, Gustavo H. Zaia; Hoeinghaus, David; Manetta, Gislaine I. & Benedito, Evanilde
Partner: UNT College of Arts and Sciences

Cesium-137 Research Irradiator

Description: Abstract: A 12,000 curie cesium-137 research irradiator has been designed and installed on the Georgia Tech campus. The evaluation of the physical characteristics of the irradiator has been completed.
Date: April 20, 1961
Creator: Carter, R. W.; Palmer, R. C. & Willis, W. V.
Partner: UNT Libraries Government Documents Department

The technology of thorium

Description: A report describing the technological uses of thorium. The report details interest in thorium as a potential source of the fissionable isotope U233 as well as possessing other applications. Most of the information in this report was obtained from project literature and from unpublished data available to the authors.
Date: 1951
Creator: Marsh, L. L. & Keeler, J. R.
Partner: UNT Libraries Government Documents Department