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Activation Analysis of the Rare Earths
No Description Available.
Neutron physics - a revision of I. Halpern's notes on E. Fermi's lectures
No Description Available.
The alloy systems uranium-aluminum and uranium-iron
No Description Available.
On Straight-Ahead $gamma$ Transmission with a Mininum in the Cross-Section
No Description Available.
Report on British ion sources. Report OANAR-48-47
No Description Available.
Alpha Particles from Fission as Recorded by Photographic Emulsions
No Description Available.
The Varieties, Quantities, and Purities of Stable Isotopes Which Have Been Concentrated Electromagnetically
No Description Available.
A Study of the Reactions Between Tungsten Dioxide and Difluorodichloromethane
No Description Available.
The Lanthanum and Cerium Isotopes of Mass 137
No Description Available.
Chemical Procedures Used in Bombardment Work at Berkeley. Addendum No. 1
No Description Available.
Carrier-free radioisotopes from cyclotron targets. V. Preparation and isolation of Se$sup 75$ from arsenic
No Description Available.
Weapon data effects and instruments. Volume 24. Section G, Appendices 50- -54
No Description Available.
THERMAL STRESSES AND STRAINS IN A FINITE CYLINDER WITH NO SURFACE FORCES
No Description Available.
STUDIES OF RECOVERY PROCESSES FOR WESTERN URANIUM BEARING ORES PART I. A CRITICAL EXAMINATION OF THE SALT-ROAST, ACID-LEACH PROCESS FOR WESTERN URANIUM ORES PART II. DIRECT ACID LEACHING OF WESTERN URANIUM ORES
No Description Available.
THE VOLUMETRIC ASSAY OF URANIUM TETRAFLUORIDE
No Description Available.
PROGRESS REPORT ON METALLURGY OF TUBALLOY TO UNIVERSITY OF CHICAGO
No Description Available.
FISSION SPECTRUM
Measurements of the spectrum of the fission neutrons of 25 are described, in which the energy of the neutrons is determined from the ionization produced by individual hydrogen recoils. The slow neutrons producing fission are obtained by slowing down the fast neutrons from the Be-D reaction of the Stanford cyclotron. In order to distinguish between fission neutrons and the remaining fast cyclotron neutrons both the cyclotron current and the pusle amplifier are modulated. A hollow neutron container, in which slow neutrons have a lifetime of about 2 milliseconds, avoids the use of large distances. This method results in much higher intensities than the usual modulation arrangement. The results show a continuous distribution of neutrons with a rather wide maximum at about 0.8 MV falling off to half of its maximum value at 2.0 MV. The total number of netrons is determined by comparison with the number of fission fragments. The result seems to indicate that only about 30% of the neutrons have energies below .8 MV. Various tests are described which were performed in order to rule out modification of the spectrum by inelastic scattering.
PROGRESS REPORT FOR THE MONTH OF AUGUST 1945
No Description Available.
Paramagnetic Susceptibilities and Electronic Structures of Aqueous Cations of Elements 92 to 95
No Description Available.
METAL HYDRIDES FINAL REPORT
No Description Available.
RECOVERY OF THORIUM AND URANIUM FROM MONAZITE SANDS. Progress Report for September 1949
No Description Available.
THE DEVELOPMENT OF EQUIPMENT FOR THE CONTINUOUS BURNING AND LEACHING OF GROUND CARBON
No Description Available.
A THEOREM AND ITS APPLICATION TO FINITE TAMPERS
A theorem is derived which is useful in the analysis of neutron problems in which all neutrons have the same velocity. It is applied to determine extrapolated end-points, the asymptotic amplitude from a point source, and the neutron density at the surface of a medium. Formulas for the effect of finite tampers are derived by its aid, and their accuracy is discussed.
ANALYTICAL INFORMATION REPORT FOR THE PERIOD JUNE 1-30, 1945
No Description Available.
The New Element Americium (Atomic Number 95)
No Description Available.
THE DISTRIBUTION OF BORON AND MOLYBDENUM IN THE RECOVERY OF NITRIC ACID AND CALCIUM NITRATE FROM RAFFINATES ORIGINATING WITH PITCH-BLENDE
No Description Available.
THE DETERMINATION OF URANIUM BY METALLIC ZINC REDUCTION-DICHROMATE TITRATION. Analytical Report
No Description Available.
PROGRESS REPORT ON METALLURGY OF TUBALLOY TO UNIVERSITY OF CHICAGO
No Description Available.
A NEW CRYSTALLINE HYDRATE OF URANIUM TETRAFLUORIDE, 2UF$sub 4$/center dot/ 5H$sub 2$O, AND ITS DEHYDRATION TO ANHYDROUS URANIUM TETRAFLUORIDE
No Description Available.
Electronic Structure of the heaviest Elements
No Description Available.
THE EVALUATION OF URANIUM TETRACHLORIDE. Analytical Report
No Description Available.
The thermodynamic properties and equilibria at high temperatures of the compounds of plutoniun
No Description Available.
THE REDUCTION OF URANIUM FROM ITS FLUORIDE BY MAGNESIUM
No Description Available.
PROGRESS (A-1) REPORT FOR MONTH OF APRIL 1946
No Description Available.
A SYSTEM OF METHODS FOR THE SPECTROCHEMICAL ANALYSIS OF URANIUM-BASE MATERIALS
No Description Available.
THE NEUTRON ENERGY DISTRIBUTION IN THE CENTER OF THE LOS ALAMOS PLUTONIUM REACTOR
No Description Available.
THE CHEMISTRY OF THE REACTION OF URANIUM HEXAFLUORIDE WITH ACTIVATED CARBON
The effects of temperature, time and other variables on the rate and extent of reaction between UF/sub 6/ and various types, grades and particle sizes of commercial activated carbon have been studied experimentally. It is shown that both hydrolysis and reduction of the UF/sub 6/ occur, the latter more slowly than the former. Reduction leads to the formation of a mixture of fluorocarbons ranging from CF/sub 4/ to a wax-like maternial volatile only above 250 deg C. There is also evidence for the adsorption of UF/sub 6/ on an undetermined substrate. (auth)
NUCLEAR REACTOR SIMULATOR
No Description Available.
PHYSICS DIVISION. QUARTERLY REPORT, PERIOD COVERED SEPTEMBER, OCTOBER AND NOVEMBER 1947
No Description Available.
THE SALTING-IN AND SUPERSATURATION OF BARIUM AND LEAD SULFATES IN URANYL NITRATE SOLUTIONS DERIVED FROM PITCHBLENDE
No Description Available.
PRELIMINARY INVESTIGATION EMPLOYING A ROTATING KILN FOR THE PREPARATION OF RF*SUB 4/ UF*SUB 4/ BY REACTION OF RO*SUB 3/ UO*SUB 3/ AND "FREON-114" (C*SUB 2/F*SUB 4/Cl*SUB 2/) AT ELEVATED TEMperatures
No Description Available.
FLEXURE TESTING OF CARTRIDES. Report on a Phase of Problem Assignment No. 181-ML-55-6 for Period August 8, 1944 to December 23, 1944
No Description Available.
THE EXTRACTION OF URANIUM FROM PITCHBLENDE BY AMMONIUM CARBONATE
No Description Available.
THE MELTING AND CASTING OF URANIUM IN SULFIDE CRUCIBLES
Uranium was successfully cast at temperatures as high as 1900 to 2000 deg C in crucibles made from CeS, CeS/sub 1.38/, ThS, ThS/sub 1.75/, and ThU/sub 0.7/S/sub 2/ with the sulfur pickup in all cases less than 0.15 wt.%, in some cases at low temperatures being less than 0.005%. A summary of actual sulfur absorption for different experimental temperatures and crucible types is given. The effect of the molten mixture of U and UBr/sub 3/(Br/U =2) upon some sulfide refractories was investigated. The results indicate that only ThS/sub 2/ and divalent sulfides like ThUS/sub 2/, US, ThS, etc., would withstand the U--UBr/sub 3/ mixture. Uranium may be separated from metal salt mixtures (CaCl/sub 2/, SrBr/ sub 2/, BaI/sub 2/, etc.) by distillation of the salt and fusion of the U in a sulfide crucible. (auth)
DIAGNOSIS OF INSTABILITY OF AN ASSAY MASS SPECTROMETER
No Description Available.
PROGRESS REPORT ON METALLURGY OF TUBALLOY TO UNIVERSITY OF CHICAGO
No Description Available.
THE DISTRIBUTION OF PRECIOUS METALS IN VARIOUS RESIDUES OBTAINED IN THE PREPARATION OF URANYL NITRATE FROM PITCHBLENDE
A study was made of the distribution of Ag, Au, Bt, and Pd in the residues from an extraction process in which purified UO/sub 2/(NO/sub 3/)/sub 2/ is prepared from a pitchblende ore. The residues studied were the gangue Pb cake, the BaSO/sub 4/ cake, the filtrate boildown cake, the raffinate cake, and the purified UO/sub 2/(NO/sub 3/)/sub 2/. Samples representing three different batches of ore were used. The following conclusions were reached: (1) neither Ag nor Pd are present in the ore in significant quantities; (2) approximately 30 ppm of Au (based on U content) is present, of which 90% was found in the residue (gangue Pb cake) from the initial co-precipitation step; this residue contains gangue, PbSO/sub 4/, RaSO/sub 4/, and other insoluble sulfates; (3) the ore contains 15 ppm of Pt, which is distributed in an extremely varying manner in the residues leaving the process. (W. L.H.)
Production of mesons by x-rays
No Description Available.
A STUDY OF THE EFFECT OF VARIOUS FACTORS ON THE YIELDS OBTAINED IN THE REMELTING OF URANIUM METAL
No Description Available.
THE MELTING AND CASTING OF URANIUM FROM POWDER
No Description Available.