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Radioactive Isotopes of Bismuth
Five isotopes of bismuth occur in nature. Using particle accelerators providing helium ions up to 40 Mev in energy and deuterons up to 20 Mev in energy, it was possible to produce and identify two artificial radioactive isotopes. With the advent of the 184-inch Berkeley syncho-cyclotron and its hundreds of Mev energies, it was possible to form highly neutron-deficient bismuth isotopes extending more than ten mass units below stable Bi(209).
Date:
April 6, 1950
Creator:
Neumann, H. M.
System:
The UNT Digital Library
The Use of Laboratory High Frequency Induction Furnaces
Equations are derived for the rates of heating of objects in induction furnaces and for the maximum temperatures attainable. The equations are primarily useful in designing conducting crucibles, shells, and cylinders so as to increase the power input and decrease heat losses. A very brief treatment is given of the factors which influence the current in the induction coil. The performances of various induction furnaces are compared.
Date:
April 3, 1950
Creator:
Brewer, Leo, 1919-2005
System:
The UNT Digital Library
Present Status of the Bevatron R. F. System
The general method of controlling the radio frequency for the full scale Bevatron will be the same as that used on the 1/4 scale machine. The details of course will be modified to meet the requirements of greater range, higher output voltage and closer tracking tolerances. In addition, there is the added complication introduced by the current ripple.
Date:
April 26, 1950
Creator:
Riedel, J.
System:
The UNT Digital Library
Chemistry Division Quarterly Report: March, April and May, 1950
A quarterly summary of reports that have been published on research being conducted at the University of California Radiation Laboratory
Date:
June 30, 1950
Creator:
University of California. Radiation Laboratory.
System:
The UNT Digital Library
Studies of the Metabolism of Certain Fission Products and Plutonium
A short survey of some of the metabolic relationships of the elements, cerium, colurbium, plutonium, strontium, yttrium, and zirconium is presented. While the results of internally deposited radium have not been investigated in these experiments, they have been extensively studies by others. Because so much is known of its biological effects, it has been included in this historical survey.
Date:
August 7, 1950
Creator:
Kawin, Bergane; Copp, D. H. & Hamilton, J. G.
System:
The UNT Digital Library
High Energy Excitation Functions in the Heavy Region
The electrostatically deflected beam of the 184-inch cyclotron has been used with the stacked foil and absorber technique to determine the excitation functions. The data are presented graphically and discussed individually for each of the reactions. The results are discussed in terms of compound nucleus formation, transparency effects, and other factors in order to arrive at a qualitative picture for the mechanism of high energy nuclear reactions with heavy nuclei.
Date:
September 26, 1950
Creator:
Meinke, W. W.; Wick, G. C. & Seaborg, G. T.
System:
The UNT Digital Library
The Photoproduction of Mesons from Hydrogen
In an effort to gain information on the nature of the photon-meson and photon-nucleon interaction, a study of the artificial production of mesons by photons has been made at the Berkeley synchrotron. The major effort of this research was concentrated on a measurement of the energy and angular distribution of u+-mesons produced when the photons strike a target of liquid hydrogen. Detection of the mesons is accomplished electronically by the technique of delayed coincidence.
Date:
August 24, 1950
Creator:
Bishop, Amasa Stone
System:
The UNT Digital Library
A Note on the Mechanism of the Formation of Alpha-Acylamino Ketones from Amino Acids
The reaction of alanine-1-C14 and phenylalanine-1-C14 with acetic anhydride in the presence of pyridine has been studied and the carboxyl group of the amino acid has been shown to be the exclusive source of carbon dioxide involved.
Date:
August 23, 1950
Creator:
Fry, Arthur & Rapoport, Henry
System:
The UNT Digital Library
Evaluation of the Pentaether and Chelate Processes for the Chemical Separation of Plutonium and Uranium
Research at the University of California Radiation Laboratory has been directed toward the development of processes designed to recover plutonium and uranium from neutron-irradiated uranium. This report has been prepared in answer to requests for information by interested workers in the Atomic Energy programs. The material discussed herein represents the efforts of a sizable research group over several years, and summarizes both the current status of the investigation and the future program now contemplated.
Date:
September 18, 1950
Creator:
Hicks, T. E. & Crandall, Howard William, 1921-1990
System:
The UNT Digital Library
Chemistry Division Quarterly Report: June, July and August, 1950
Quarterly progress report on various research projects conducted at the University of California Radiation Laboratory.
Date:
September 25, 1950
Creator:
Lawrence Berkeley National Laboratory
System:
The UNT Digital Library
Neutron Yield in Uranium vs. Energy of Deuterons and Protons
The purpose of this note is to recalculate the semi-empirical curve of neutron yield vs. deuteron energy originally obtained by H. York in order to predict, using it and the best available data, what yields may be expected for deuterons on uranium in the extrapolated energy region.
Date:
October 11, 1950
Creator:
Brown, H.
System:
The UNT Digital Library
Multiplying Lattices
The use of thermally fissionable material in the lattice adds a distributed source of fast neutrons which must be considered in evaluating the problem.
Date:
October 18, 1950
Creator:
Brown, H.
System:
The UNT Digital Library
The Chelate Process, IV. Process Flow Involving o-Dichlorobenzene as the Solvent for TTA
Comparative studies of a series of halogenated solvents, as carriers for TTA in the chelate process for plutonium extraction, indicate that ortho-dichlorobenzene most nearly satisfies the requirements that are set forth. A complete process design is presented for use with this solvent, and flow data and equipment capacities are given for dissolver solution and for uranium-free fission product solution as alternate feeds to the process.
Date:
January 1951
Creator:
Davis, M. W., Jr.; Hicks, T. E. & Vermeulen, T.
System:
The UNT Digital Library
Ozone and Nitrogen Oxide Production by Irradiation of Air
In regard to the production of ozone and various nitrogen oxides in air by action of x-rays or gamma rays, thre seems to be no direct experimental data which can be used. There is some data on the action of alpha particles on air and some on the action of cathode rays.
Date:
December 21, 1950
Creator:
Newton, A. S.
System:
The UNT Digital Library
Calculation of k-o in a Uranium-Graphite Lattice
Since the 25 content of the uranium to be used in a MTA multiplying lattice is quite uncertain at present, it is necessary to assume various degrees of depletion in order to estimate the multiplication constant K-o and the production of 49 in an infinite uranium-graphite lattice
Date:
February 8, 1951
Creator:
Adelman, F.
System:
The UNT Digital Library
III: Two-Group Approximation to Absorbing Lattices
The mathematics of the approximation is developed for the case of a H2O-cooled, graphite-moderated matrix
Date:
February 12, 1951
Creator:
Brown, Harold
System:
The UNT Digital Library
IV. Production and Heating
Calculations are developed which indicate the Pu production is an infinite lattice
Date:
February 13, 1951
Creator:
Brown, Harold
System:
The UNT Digital Library
Square Wave Testing of Air Dielectric Coaxial Transmission Line Components
An outline is given for mismatch and delay measurements methods on air dielectric transmission line components, and techniques for square wave testing are outlined. Equipment design of the needed pulsers, attenuation and delay sections, and high speed oscilloscopes is disclosed. The final section of this report is devoted to measurements and how to analyze results
Date:
June 1951
Creator:
Heller, Robert E.
System:
The UNT Digital Library
V. Multiplying Lattices of the Hollow Type
A two-group approximation of the fission ratios and Pu production in an infinite hollow matrix is developed
Date:
February 14, 1951
Creator:
Brown, Harold
System:
The UNT Digital Library
MTA Quarterly Progress Report: September, October and November, 1951
Quarterly report which includes brief summaries of research studies related to technology materials and accelerator testing
Date:
February 16, 1951
Creator:
Lawrence Radiation Laboratory
System:
The UNT Digital Library
RF Field Investigations on the 1/10 Scale Mark I Cavity
A complete investigation was made of the r-f field in the 1/10-scale Materials Testing Accelerator (Mark I) cavity
Date:
March 13, 1951
Creator:
Dazey, Mitchell; Nielsen, Dale; Robertson, Raymond & Sewell, Duane
System:
The UNT Digital Library
Transient Temperatures in Flat Plates
Calculations presented were done to determine what maximum temperature gradients and stresses would be in typical designs of flat thorium plates, 100 mils thick and coolled on both sides by NaK.
Date:
April 6, 1951
Creator:
Hanson, Donald N.
System:
The UNT Digital Library
High Energy Proton Spallation--Fission of Uranium
The fission and spallation reactions caused in uranium by bombardment with high energy protons (340 to 350 Mev) were investigated. The reaction products were separated from the target by chemical processes and identified by their radioactive properties. The relative yields of the observed fission products were measured, and the results plotted as a function of mass number. Several of the spallation products were identified and their yields estimated.
Date:
May 28, 1951
Creator:
Folger, R. L.; Stevenson, P. C. & Seaborg, Glenn T. (Glenn Theodore), 1912-1999
System:
The UNT Digital Library
Gap Splitter Radiofrequency Power Loss
Calculations indicative of the power loss for 75 in.radius gap splitters are given.
Date:
April 9, 1951
Creator:
Robertson, R. D.
System:
The UNT Digital Library