335 Matching Results

Search Results

Lawrence Radiation Laboratory Physcis Division Quarterly Report: February - May 1948

Description: The following report is a quarterly report done by the Physics Division of the University of California's Radiation Laboratory, covering the period of February 1, 1948 to May 1, 1948. This report discusses general physics research and the development and operation of the accelerator.
Date: June 30, 1948
Creator: University of California. Radiation Laboratory.
Partner: UNT Libraries Government Documents Department

Research Progress Meeting June 10, 1948

Description: This summary of the research progress meeting on June 10, 1948 discusses the following topics: (1) 184-inch cyclotron (J. Vale); (2) Slow neutrons in the shielding of the 184-inch cyclotron (W. Benson); and (3) Fission of thorium with alpha particles (A. Newton).
Date: June 10, 1948
Creator: Wakerling, R. K. (Raymond Kornelious), 1914-
Partner: UNT Libraries Government Documents Department

Summary of the Research Progress Meeting

Description: Technical report includes three reports of research progress: 1)Meson Mass Determination by Grain Counting, W. H. Barkas; 2) The Magnetic Beta Ray Lens Spectrograph, A. C. Helmholz; 3) Anthracene Counters, E. Martinelli.
Date: May 13, 1948
Creator: Wakerling, R. K. (Raymond Kornelious), 1914-
Partner: UNT Libraries Government Documents Department

The Activity Coefficient of Plutonium(IV) Salts in Acidic Solutions

Description: Summary: The activity coefficient of Pu(Cl04)4 was measured in perchloric acid solutions. The procedure used was to measure the extraction of the neutral plutonium(IV)-TTA chelate into benzene-TTA solutions at different perchloric acid concentrations. Equations are presented which show the relation of the extraction coefficients, obtained in the above manner, to the activity coefficient of plutonium(IV) per-chlorate. The activity coefficient of Pu(Cl0~)4 is similar to that of a strong acid, e.g., perchloric acid, in that its value increases rapidly when the perchloric acid concentration becomes greater than 2M. The distribution coefficient of TTA between benzene and aqueous perchloric acid solutions was found first to decrease slightly and then to increase two fold as the perchloric acid was varied from 0.01 to 6M. The activity coefficient of the uranous-TTA chelate in benzene was calculated from the results of solubility measurements. The values of the activity coefficient of UK4 are,within experimental error, identical with the values of the activity coefficient of TTA itself.
Date: November 1948
Creator: Connick, R. E. & Reas, W. H.
Partner: UNT Libraries Government Documents Department

The Chelate Process III : Preliminary Continuous-Operation Studies

Description: Abstract: The rate of extraction of PuIV in either direction between benzene-TTA and aqueous HNO3 solutions is shown in the present study to be fast enough so that application of the chelate process to continuous operation should be feasible. This conclusion is based on two primary considerations: 1. The mechanism limiting the rate of extraction appears to be diffusion and not chemical-reaction-limiting. 2. The extraction may be controlled by adjustment of the system conditions to give almost any desired specifications of rate and/or equilibrium. A continuous process involving multiple extraction stages with a controlled pH gradient is proposed for obtaining maximum decontamination and plutonium recovery.
Date: June 1, 1948
Creator: Rubin, B. (Barney), 1924- & Hicks, T. E.
Partner: UNT Libraries Government Documents Department

Summary of the Research Progress Meeting June 17, 1948

Description: This summary of the research progress meeting on June 17, 1948 discusses the following topics: (1) Potassium 43 (R. Overstreet); (2) Recoils (A. Ghiorso); (3) M.I.T. accelerator conference (W. Panofsky); and (4) Cosmic rays (Prof. Louis Le prince - Ringuet, France)
Date: June 17, 1948
Creator: Folden, Margaret Foss
Partner: UNT Libraries Government Documents Department

Magnetic Field Measurements by Nuclear Resonance

Description: Abstract: The purpose of this report is to outline the work done at the Radiation Laboratory toward the development of a magnetic field measuring device using the phenomenon of nuclear resonance. While the work described here is far from complete, it has served to indicate the limitations of the method as well as some of its possibilities. For reasons which will become apparent, the project is being discontinued. It is hoped that this report will serve as a starting point should the work be continued at some later time and that some of the mistakes already made need not be repeated.
Date: August 20, 1948
Creator: Kafitz, Peter
Partner: UNT Libraries Government Documents Department

Paramagnetic Susceptibilities and Electronic Structures of Aqueous Cations of Elements 92 to 95

Description: Abstract: Magnetic susceptibilities per gram atomic weight of elements 92 to 95 in most of their oxidation states were measured at 20°C on 0.1 ml of solution which was 0.005 to 0.09M in heavy element. The values obtained (all paramagnetic) in units × 106 were: U(IV), 3690; Np(VI), 2060; Np(V), 4120; Np(IV), 4000; Pu(IV), 1610; Pu(III), 370; Am(III), 720. The results could be interpreted only on the basis of electronic configurations 5fn, even though susceptibilities were generally lower than the theoretical values and lower than experimental values for corresponding lanthanide 4fn cations. The lower values should be expected as a result of the Stark effect produced by electric fields of anions and of water dipoles. Failure of the Russell‐Saunders approximation to the coupling between electrons may account for some of the error in the theoretical calculations. That the susceptibilities of Pu(III) and Am(III) are manyfold lower than those of Sm(III) and Eu(III), respectively, is attributed to wider multiplet splitting in the actinide atoms.
Date: November 12, 1948
Creator: Howland, Jerome J. & Calvin, Melvin, 1911-1997.
Partner: UNT Libraries Government Documents Department

Summary of the Research Progress Meeting

Description: 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-
Partner: UNT Libraries Government Documents Department

Research Progress Meeting June 3, 1948

Description: This summary of the research progress meeting on June 3, 1948 discusses the following topics: (1) Photomultipliers (L. Wouters); (2) Positive mesons (C.M.G. Lattes); and (3) Background work in 184-inch program (W. Panofsky).
Date: June 3, 1948
Creator: Folden, Margaret Foss
Partner: UNT Libraries Government Documents Department

Summary of the Research Progress Meeting June 24, 1948

Description: This summary of the research progress meeting on June 24, 1948 discusses the following topics: (1) Spectrographic analysis of alpha active materials (J. Conway); and (2) Range energy determinations (Dr. R.L. Thornton, Mr. Walter Stephan and Mr. Walter Aron).
Date: June 24, 1948
Creator: Wakerling, R. K. (Raymond Kornelious), 1914-
Partner: UNT Libraries Government Documents Department

Species of Uranium(VI) with TTA in Benzene and Perchloric Acid, the Charge on Uranyl Ion

Description: Abstract: Part I: A series of extraction experiments has been performed to determine the distribution coefficient of uranium(VI) between dilute perchloric acid and benzene solutions of TTA. The data are interpreted to show that the principal species in the acid phase is a doubly charged ion, UO2++. The discrepancies revealed in previous work(1) were not found. Part II: The spectrophotometric method of analysis developed for use in Part I has shown the existence of previously unreported species of uranium(VI) in the presence of TTA: UO2K2-HK in benzene, and UO2K+ in dilute acid. The absorption spectra of all the principal species are reported.
Date: September 1948
Creator: Orr, William C.
Partner: UNT Libraries Government Documents Department

Chemistry Division Quarterly Report: September, October and November, 1948

Description: A quarterly report consisting of reports published on Transuranic Elements from the University of California Radiation Laboratory. Each report is a brief one to two page summaries of the article submitted for publication during the months of September-November, 1948.
Date: September 1948
Creator: Lawrence Radiation Laboratory
Partner: UNT Libraries Government Documents Department

Neutron Production in the Pinch Due to Instability Breakup

Description: Abstract: "The neutrons from the linear pinch in Berkeley have been shown to originate from deuteron collisions with a large net center-of-mass velocity in one direction along the axis of the pinch tube. The interpretation of this result is that the neutron production associated with the pinch is non-thermonuclear in origin. The object of this paper is to review the experimental evidence and discuss a possible source of the neutron production."
Date: May 12, 1956
Creator: Colgate, Stirling A.
Partner: UNT Libraries Government Documents Department