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Physics group progress report, May 1--31, 1948

Description: Various studies conducted at Mound Laboratory concerning physical properties of postum (Polonium 210) are described. Some studies are entitled Purity of Postum (Vacuum Balance Method); Vapor Pressure of Postum; X-ray Studies; Vapor Pressure by Effusion; Molecular Weigh of Postum; and Weighing Procedures for Macroassay.
Date: December 31, 1948
Creator: Knauss, H.P.
Partner: UNT Libraries Government Documents Department

Gamma scale chemistry progress report

Description: This report considers the work done during the year ending June 30, 1948, present work being done and future plans on the determination of formulas, methods of preparation, and properties of as many compounds of postum as possible. An experimental approach to such a research problem on the element postum requires that procedures which may be used deal with ultramicro quantities of material. Such procedures on an ultramicro or gamma scale require special techniques by personnel trained in manipulating these small quantities of radioactive material. Equipment which may be used varies with the experiment considered. Often new apparatus must be developed or equipment previously developed and used in some other experiment must be modified. This generalized research problem is subdivided in the {open_quotes}Research Problems Outline{close_quotes}. The presentation of a survey of these research problems with reference to the outline for the year ending June 30, 1948 is a critical review of the work done by the Gamma Scale Chemistry Group as well as a consideration of future plans. The course which these future plans may follow will depend upon information which may be obtained when carrying out planned experiments.
Date: June 1, 1948
Creator: Economides, M.; Estabrook, E. & Joy, E.F.
Partner: UNT Libraries Government Documents Department

Electrodeposition research progress report, July 1--31, 1948

Description: The cell used in production plating has a platinum anode and a platinum cathode. The potential at which the platinum cathode rests is not independent of the current, bat varies with it. In order to separate postum from other cations by electroplating out of solution, it is necessary to establish the plating potential at a value which will allow complete plating of postum, but will preclude the deposition of as many other cations as possible. This potential has been found to be about 0.00 v. to the normal calomel electrode. The procedure for determining the amount of loss postum as related to the time between the removal from the plating bath and the immersion into the water rinse has been worked out. Two runs have been made, neither of which were very successful because of mechanical difficulties which occurred during the runs. The second run showed, however, that as the time increased the amount remaining in the water rinse also increased very rapidly. It has been found that a very excellent method of removing suspended material from a solution of aqueous hydrogen fluoride is to filter it through a funnel machined out of teflon with a disc of a porous teflon sheet. It was found that the spongy teflon used in this experiment had a porosity of about 16.5 microns. It was possible to reduce the size by compression to about 2.0 microns. In this way any porosity of material can be obtained depending on the original size of the pores and on the pressure used to compress it.
Date: December 31, 1948
Creator: Orban, E.
Partner: UNT Libraries Government Documents Department

Electrodeposition research progress report, March 1--31, 1948

Description: Plating of Postum out of Nitric Acid and Hydrofluoric Acid Solutions -- W. Abel and W. Raiff. Postum was plated out of 1.5 normal nitric acid and 1.0 normal hydrofluoric acid under similar conditions. The hydrofluoric acid plate was better appearing, and had a much higher curie density. However, neutron counts in these runs were quite similar. Neutron Counts -- W. Abel and W. Raiff. A study of the change of neutron counts over a period of time was started. Conversion of Active Hydrofluoric Acid Solutions to Hydrochloric Acid Solutions -- W. Raiff. A 99.99+ per cent conversion was effected. Conversion of Production Solutions to 1.0 Normal Hydrofluoric Add Solutions -- R. Bell. Good conversion has been achieved; however, further work needs to be done on complete change of postum from the production solution to 1.0 normal hydrofluoric acid solutions.
Date: December 31, 1948
Creator: Orban, E.
Partner: UNT Libraries Government Documents Department

Laboratory instrument design progress report, July 1--31, 1948

Description: One current model Ryerson quartz-fiber microbalance fitted with a quartz-fiber beam but lacking the entire optical system was received from Argonne National Laboratory on June 30, 1948. The first trails of the fiber drawing machine indicated excessive vibration originating in the motorized variable-speed transmissions and accentuated by the machine frame. Isolation of the motorized transmission vibrations from the drawing machine permitted successful drawing on first trials of the eight diameters of fibers between 750 and 5 microns needed for balance beam construction. Each trial yielded a full reel (approximately 150 feet) of usable fiber, through storage facilities were inadequate to preserve the entire quantity.
Date: December 31, 1948
Creator: Olt, R.G.
Partner: UNT Libraries Government Documents Department

Gamma scale chemistry progress report, May 1--31, 1948

Description: An attempt has been made to prepare a compound of postum (Polonium 210) analogous to K{sub 2}{sup TeBr}{sub 6}. A preliminary experiment indicates possible preparation of bromides of postum and that these bromides are analogous to the chloride of postum. Photomicrographs of two crystalline forms of a product resulting from the reaction of bromine and postum are included in this report together with procedure used to form these crystals. Intermediate compounds formed in the attempted preparation of potassium postum bromide include a white residue from nitric acid containing postum and a yellow material formed on the ignition of this white residue. This yellow residue was identical in appearance to the yellow dioxide of postum. A red crystalline precipitate resulted when the yellow residue, which may well be QO{sub 2}, was treated with solution of hydrobromic acid and potassium bromide. Investigation of the use of titanium trichloride as a reducing agent to titrate, quantitatively tellurium dioxide has not yielded concordant results. An effort is being made to determine the best conditions for such a titration potentiometrically. Variations in concentrations, temperature of titration, electrode surface, acid concentration, and degree of agitation are in suspect.
Date: December 31, 1948
Creator: Martin, A.
Partner: UNT Libraries Government Documents Department

Physics progress report

Description: Difficulty encountered in the preparation of a pure postum sample for vapor pressure measurements with the quartz sickle gauge is tentatively ascribed to the existence of lead postumide. The modifications which have been made since June 1, 1948 in the apparatus for the measurement of vapor pressure by effusion are discussed. The apparatus in its new form is essentially complete and awaits the delivery of a Dewar flask before measurements are begun. In the preparation of a sample for the determination of the purity of postum with the vacuum balance, difficulties similar to those in Section 1 above were encountered. Resistivity of Postum - No progress. Ninety-one neutron counts were made for other groups. A specially shaped postum sample has been prepared for use in the attempts to flatten the response of the lead-geometry gamma counter. Patterns obtained from the recently acquired sample of elemental postum show the slight increase in unit cell size previously reported; however, the formation of the PbQ compound was detected much earlier than with the older sample.
Date: October 1, 1948
Creator: Haring, M.M.
Partner: UNT Libraries Government Documents Department

Production division progress report, May 1--31, 1948

Description: A long term study on the possible effect of time on the micro-assay purity of postum product solutions is reported. It was determined that within the time periods studied (up to 102 days) time has no discernible effect on the mass purity of the postum electrodeposited from product solutions.
Date: December 31, 1948
Creator: Burbage, J.J.
Partner: UNT Libraries Government Documents Department

Crystal structure of polonium and its decay products

Description: X-ray diffraction patterns have been obtained from a sample of elemental polonium over a period of more than four half-lives. This time study was made for the purpose of determining the effect of decay upon the lattice constants and crystal structure of the element.
Date: March 1, 1948
Creator: Haring, M.M.
Partner: UNT Libraries Government Documents Department

Production research progress report, February 16--29, 1948

Description: The equipment for the Bismuth-II process has been installed at Unit IV., and two runs have been made. The results on the potential of bismuth in bismuth chloride solutions have been summarized and calculations made on the concentration of silver in solution which must be present if silver is to be reduced to the metal by Metallic bismuth. The results have been compared with earlier experiments in which the deposition of silver on bismuth was investigated by the use of gamma active silver as a tracer. From the results it becomes quite evident that the scrubbing of silver on bismuth, under the present conditions employed in the production process, cannot be attributed to the reduction of silver to the metal, but must result from the adsorption of silver ions on the surface of the bismuth powder. From these same calculations it is also evident that when silver is employed as a scrubbing medium, bismuth will be deposited on the silver surface until the silver concentration in the bismuth chloride solution reaches a concentration of 20--200 ppM of silver in the bismuth, depending on the chloride concentration of the solution.
Date: December 31, 1948
Creator: Payne, J.H. Jr.
Partner: UNT Libraries Government Documents Department

Process research progress report

Description: This document is a declassified July 1948 Progress Report on Process Research at Monsanto Chemical`s Mound facility. Areas discussed are: (1) treatment of hot solid wastes, and (2) treatment of hot liquid wastes. Chemical aspects of these processes are noted.
Date: July 1, 1948
Creator: Hamilton, P.; Huddleston, F. & Mead, F.
Partner: UNT Libraries Government Documents Department

Electrodeposition research progress report, August 1--31, 1948

Description: Studies to test the conversion of production solutions to postum (polonium 210) solutions of hydrofluoric acid involving compressed teflon are documented. Several experiments to assess the effect on production plating yields are described including varying time between rinses, current density, and use of detergents. Varying the time between rinses showed no correlation with the neutron counts on the finished gauzes.
Date: December 31, 1948
Partner: UNT Libraries Government Documents Department

General chemistry progress report

Description: Decomposition potentials of bismuth solutions of 1.037 and 0.509 grams of the metal per 100 ml. of 1.5 nitric acid were found to be -0.06 and -0.09 volts to N.C.E. These results confirm previous values and indicate that bismuth will not be reduced from production solutions at the potential of the normal calomel electrode. A summary of research in progress, completed, or anticipated is given.
Date: June 1, 1948
Creator: Barth, S.; Ford, M. & Dismore, P.
Partner: UNT Libraries Government Documents Department

General chemistry progress report

Description: This document is a de-classified August 1948 General Chemistry progress report from Monsanto Chemical`s Mound facility. General chemical properties of Postum compounds are discussed, and experimental data on these properties are presented.
Date: August 1, 1948
Creator: Barth, S.; Ford, M. & Dismore, P.
Partner: UNT Libraries Government Documents Department

Calorimetry research progress report

Description: This document is a November 1948 Calorimetry Research Progress Report from the Mound Laboratory. Updates are given in the following areas: (1) development of micro and macrocalorimeters of the resistance-bridge type, (2) study and design of a rod calorimeter, (3) half-life of Postum, (4) evaluation of various calorimeter types, (5) applied mathematics, (6) materials, and (7) future efforts.
Date: November 1, 1948
Creator: Haring, M.M.
Partner: UNT Libraries Government Documents Department

Neutron source progress report

Description: This document is a de-classified June 1948 progress report on neutron source development at Monsanto Chemical`s Mound facility. Specific sources reviewed are: (1) Postum-beryllium, (2) Postum-Boron and Postum-Fluoborate, and (3) Postum-Lithium and Postum-Sodium. Preparation of each source is discussed, and some of their physical properties are given.
Date: June 1, 1948
Creator: Bentz, L.; Birden, J. & Hertz, R.
Partner: UNT Libraries Government Documents Department

Monsanto Chemical Company Unit 3 progress report, January 16--31, 1948

Description: This monthly report provides brief progress descriptions of a number of projects being conducted at Mound Laboratory. Projects include sensitivity of the scaler used for neutron counting, purity of postum (Polonium 210), vapor pressure of postum, resistivity of postum, vapor pressure of selenium,and x-ray diffraction studies to determine the coefficients of expansion for aluminum, copper, lead,and gold.
Date: December 31, 1948
Partner: UNT Libraries Government Documents Department

Production electrolysis studies V

Description: This study seeks to determine the decomposition of bismuth trioxide by polarography. Results gained confirmed that at decomposition potentials observed that bismuth will not be reduced under normal plating conditions observed during production.
Date: December 31, 1948
Creator: Power, W.H. & Ford, M.
Partner: UNT Libraries Government Documents Department