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The Multi-Channel Pulse Analyser

Description: This report discusses the multi-channel pulse analyser including its components and operation.
Date: June 14, 1946
Creator: Ghiorse, Albert; Weissbourd, B. & Robinson, H.
Partner: UNT Libraries Government Documents Department
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The Bragg Reflection of Neutrons by a Single Crystal

Description: From cover page: This document has been assigned the above MDDC (Manhattan District Declassification) number, as given in the List of Declassified Documents issued semi-monthly by the Research Division, Manhattan District. In the case of Los Alapnos reports, LADC (Los Alamos Declassification) numbers are listed on the title page if known. This declassified document may differ materially from the original classified document by reason of deletions necessary to accomplish declassification. Hence,… more
Date: June 14, 1946
Creator: Zinn, Walter H.
Partner: UNT Libraries Government Documents Department
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Some Studies of the Reactions of Uranium Oxides with Hydrogen, Oxygen and Water

Description: Abstract: The purpose of this research was to obtain data that would be useful in predicting changes that might be expected to occur in the oxidation state and degree of hydration of powdered uranium oxides maintained for long periods of time at temperatures between 30 and 300 degrees C. in the presence of excess water, hydrogen, oxygen and possibly hydrogen peroxide. The reaction of hydrogen and oxygen with water slurries of U3O8 were studied at 100-300 degree C.
Date: June 1946
Creator: Gillies, Daniel M.
Partner: UNT Libraries Government Documents Department
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Effects of Total Body Z Irradiation of Rats. Part I, Lethal Action of Single, Paired, and Periodic Doses

Description: Abstract: Exposure of Sprague Dawley white rats to single doses of 900 kvp X radiation demonstrated a medium lethal dose of 600 r which was not markedly dependent upon sex, weight, or, in the case of females, stage of the estrous cycle at the time of irradiation. Deaths within 30 days were most frequent between the fourth and eighth, and between the tenth and fifteenth post- irradiation days, indicating the existence of at least two processes leading to death in the "acute" period.
Date: June 17, 1947
Creator: Hagen, Charles W., Jr. & Simmons, Eric L.
Partner: UNT Libraries Government Documents Department
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The Preparation of Tungsten Hexafluoride

Description: From introductory paragraph: "Because of the possibility that tungsten hexafluoride might occur as an impurity in uranium hexafluoride it seemed worthwhile to prepare some of the material in order to become familiar with its mode of preparation, reactions, etc."
Date: June 1942
Creator: Priest, Homer F. & Colton, R.
Partner: UNT Libraries Government Documents Department
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The Geochemistry of Columbium and Tantalum

Description: From abstract: "This is a review, with annotated bibliography, of the mode of occurrence of the elements columbium and tantalum. It is not a list of specific ore deposits, but a summary of the types of minerals and rocks in which these elements have been reported to occur. In addition, the unpublished spectrographic studies of the Geological Survey are summarized, best sources for columbium and tantalum are indicated, and suggestions are made for further investigation."
Date: June 1946
Creator: Fleischer, Michael, 1908-1998 & Harder, James O.
Partner: UNT Libraries Government Documents Department
open access

The Chemical Effects of Nuclear Transformations

Description: This technical report is divided into two sections addressing two different chemical effects of nuclear transformations. The first section discusses the beta decay of lanthanum to cerium. The second section discusses the beta decay of selenium to bromine.
Date: June 6, 1946
Creator: Coryell, Charles D. (Charles Du Bois), 1912-1971; Gest, H.; Edwards, R. R. & Davies, T. H.
Partner: UNT Libraries Government Documents Department
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The Spatial Distribution of Neutrons Slowed Down by Elastic Collisions

Description: Technical report discussion of the complicated problem of the spatial distribution of slowed down neutrons. The introduction covers the current research on the topic. The following chapters cover the topics: (1) approximate treatment and its limitations, (2) age-velocity distribution, (3) general scheme of treatment based on transport equation, (4) Fermi's one-dimensional model, (5) moments, (6) remarks about the distribution function, and (7) point source.
Date: June 11, 1946
Creator: Placzek, G. (George), 1905-1955.
Partner: UNT Libraries Government Documents Department
open access

Nucleonics and the Chemical Engineering Curriculum

Description: This report discusses the field of nucleonics in the wake of the development of the atomic bomb, ruminating on the training and curriculum necessary for the next generation of chemical and nuclear engineers.
Date: June 14, 1946
Creator: Leverette, M. C.
Partner: UNT Libraries Government Documents Department
open access

Pile Kinetics

Description: From abstract: "A pile will run steadily at an arbitrary level if it is just critical. For a pile not at equilibrium, equations of motion can be set up that contain as variables the pile power, the number of delayed neutron emitters and, in case it is of importance, also the pile temperature. The coefficients will depend on the average lifetime of the neutrons in the pile, the fractions and periods of delayed neutrons, temperature coefficients of resistivity and similar quantities. For a defini… more
Date: June 14, 1946
Creator: Nordheim, L. W.
Partner: UNT Libraries Government Documents Department
open access

A Critical Survey of Neutron Cross Sections

Description: From introductory paragraphs: "The central problems in neutron research are the understanding of nuclear structure and the study of the properties of nuclear particles, particularly the properties of the neutron. The most fruitful attack on these problems is the determination of the probability of interactions between neutrons and nuclei, i.e., the measurement of neutron cross sections. Ideally, this involves the study of all possible types of neutron interaction with all available nuclei at al… more
Date: June 20, 1964
Creator: Goldsmith, H. H.
Partner: UNT Libraries Government Documents Department
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A Mass Spectrograph for the Analysis of Fission Product Mixtures

Description: From introduction: "The analysis of mixtures of fission products with a mass spectrograph offers certain advantages. A chemical separation of the fission products found in the solution at Hanford is not necessary with the mass spectrograph technique. A sample of the mixtures can be placed on the sample holder and then the sample holder is mounted in the mass spectrograph. This reduces the amount of handling of the active solutions to one relatively simple and short operation. The health hazards… more
Date: June 12, 1946
Creator: Lewis, Lloyd G., 1917-
Partner: UNT Libraries Government Documents Department
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A Colorimetric Method

Description: From abstract: "This paper gives a method for determining Uranium using sodium cresotate as a colorimetric reagent. A precision is obtained of better than 2%. In carrying out analyses for Uranium in corrosion products by existing methods such as ignition to the oxide, silver reductor, or titration with ceric sulfate, it became apparent that a rapid, fairly accurate method for determining uranyl ion would be of great value. Such a method is described in this paper. The most logical color to use … more
Date: June 30, 1943
Creator: Priest, H. F. & Priest, G. I.
Partner: UNT Libraries Government Documents Department
open access

The Geochemistry of Indium

Description: Abstract" This is a review, with annotated bibliography, of the mode of occurrence of the element indium. It is not a list of specific ore deposits, but a summary of the types of minerals and rocks in which indium has been reported to occur. In addition, the unpublished spectrographic studies of the Geological Survey on mill and smelter products are summarized, best sources of indium are indicated, and suggestions are made for further investigations. Indium has been found to occur most abund… more
Date: June 1946
Creator: Fleischer, Michael, 1908-1998 & Harder, James Otto.
Partner: UNT Libraries Government Documents Department
open access

Pile Neutron Physics (2)

Description: Abstract: In order to calculate the difference between the number of neutrons which cross the x = o plane before and after the channel has been introduced we consider the number of neutrons which cross an element of cylinder wall at a height x1 and in a direction between (see Figure 5).
Date: June 3, 1947
Creator: Weinberg, Alvin Martin, 1915-2006
Partner: UNT Libraries Government Documents Department
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