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164
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68
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43
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24
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22
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401 Matching Results
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The DD and TD Cross Sections
The total cross sections of the reactions DDp, DDn, TD at 10 kev to 10 Mev are estimated from a review of the experimental data up to January 1951. Maxwell averages for DDp and TD computed from these estimates are given, together with some fitted analytic expressions provided for machine use. A collection of the identifiable earlier estimates is also included for reference and for comparison with the new figures. For relative order of magnitude purposes, cross sections and the derived Maxwell averages are given down to 50 ev using the theoretical Gamow slopes for the extrapolation. Gamow plots for the derived cross sections above l0 kev arc also given. Much of the primary experimental data exists in the form of thick target yields and we find the most uncertain factor in converting these thick targets yields into cross sections is the magnitude of the D/sub 2/O stopping cross section. The particular D/sub 2/O stopping cross section relation used in this derivation together with some of the earlier stopping cross sections are given. Thick target yields are included for both DD and TD on D/sub 2/ targets, at 0.01 to 1 Mev, experimental values being supplemented by calculated values.
Date:
May 10, 1951
Creator:
Tuck, J L
Object Type:
Report
System:
The UNT Digital Library
The Decontamination of Uranium from Fission Products by the Use of the Uranyl Oxalate Precipitation Reaction
Abstract: "Decontamination factors of the order of 10-4 were obtained for Beta and Gamma emitters present as fission products when uranium was precipitated from 50 mC activity level solutions as uranyl oxalate under normal uranium yield conditions for three cycles (~60%). Factors of the order of 10-3 were obtained by the use of this reaction with similar solutions under relatively high uranium yield conditions for three cycles (~90%). The uranium peroxide precipitation reaction proved to be of no value on such solutions, yielding decontamination factors of only 17.1 Beta emitters and 1.2 for Gamma emitters for three cycles."
Date:
May 10, 1951
Creator:
Kelchner, B. L.
Object Type:
Report
System:
The UNT Digital Library
Ion Exchange Experiments with Polonium
The state of polonium in aqueous solutions was investigated by means of ion exchange equilibrium studies. The distribution of the polonium between the solid and liquid phases was determined for solutions of various compositions using both a cation and an anion exchanges. These studies show that in the absence of a complexing agent polonium is hydrolyzed to such a degree that it forms monovalent cations and anions whose charge was not investigated in this study.
Date:
May 11, 1951
Creator:
Tompkins, Edward R.
Object Type:
Report
System:
The UNT Digital Library
Possible Substitutes For Glue in South African Ore Treatment
We investigate the possibilities of using another reagent than glue as a filtration aid in South African ore treatment.
Date:
May 14, 1951
Creator:
Woody, R. J.
Object Type:
Report
System:
The UNT Digital Library
Elementary Theory of Neutron Sources in Reactors
The following report discusses neutron sources in reactors, discussing general conditions of the study using a flux reactor.
Date:
May 18, 1951
Creator:
Masket, Albert Victor Hugo, 1914-
Object Type:
Report
System:
The UNT Digital Library
Homogeneous Reactor Experiment Quarterly Progress Report for Period Ending February 28, 1951
Technical report covering the Homogeneous Reactor Experiment (HRE) reactor physics and engineering, out-of-pile corrosion, in-pile studies, recombination of hydrogen and oxygen, HRE chemical studies, experimental programs for the HRE, and long-range studies. [From Summary]
Date:
May 18, 1951
Creator:
Winters, C. E.; Secoy, C. H. & Thompson, W. E.
Object Type:
Report
System:
The UNT Digital Library
Mound Laboratory Report for General Research: December 26, 1950 to April 16, 1951
A report of quarterly results of research and development directed towards establishing new techniques and instruments towards improving present methods for determining levels of radioactivity accurately and safely.
Date:
May 21, 1951
Creator:
Baker, W. H.; Combs, J. F.; Rogers, A. J.; Curtis, M. L.; Gray, M. I.; Olt, R. G. et al.
Object Type:
Report
System:
The UNT Digital Library
Corrosion Data for Type 347 Stainless Steel Pipe Waste Metal Recovery Process
Introduction: "A limited test progress for the evaluation of type 347 stainless steel pipe which failed the Huey (?) test has been complicated. The tests reported herein were similar in scope to those reported in document number EW-20765, Corrosion Tests on Stainless Steel Plate, Waste Metal Recovery Process. Material tested was obtained on order number EWC-8553, National Tube Company Heat #3X9741. Lots 9789 and 9790."
Date:
May 22, 1951
Creator:
Sanborn, Kenneth L.
Object Type:
Report
System:
The UNT Digital Library
Fundamental Equations Describing Neutron Behavior in a Cavity
This report provides fundamental equations and maps to calculate neutron behavior in a spherical cavity.
Date:
May 22, 1951
Creator:
Willmer, D. B. & Imhoff, D. H.
Object Type:
Report
System:
The UNT Digital Library
Fraction of Total Beam Current as a Function of A-12 Beam Radius
The following report provides data describing the total electron beam current as a function of A-12 beam radius. The beam is investigated using the provided equations.
Date:
May 24, 1951
Creator:
McKisson, R. L.
Object Type:
Report
System:
The UNT Digital Library
The Polarographic Determination of Uranium in the Presence of Plutonium
Strubl's polarographic method for the determination of uranium in the presence of iron can be used for the determination of uranium in plutonium solutions. A hydroxylamine hydrochloride solution (2M) is used as the supporting electrolyte. This reduces the plutonium to the plus three oxidation state without reducing the uranium. The uranium may then be determined polarographically by measuring the height of the uranyl reduction wave (UVI to UV) at -0.35 volts (vs. S.C.E.) applied potential. Solutions with a U/Pu weight ratio as low as 3.5 x 10(-3) were analyzed with an error of less than 2%. This error increased to 6% for solutions of 1 x 10(-3) U/Pu ration and is considerably larger for smaller U/Pu ratios.
Date:
May 25, 1951
Creator:
Smith, Maynard E. (Maynard Elliott)
Object Type:
Report
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
Object Type:
Report
System:
The UNT Digital Library
Aluminium Corrosion in High Purity Water
Summary: "A corrosion test of aluminum components in a 4-ft. section of a fuel tube has been tested under conditions simulating plant geometry and, as nearly as possible, the operating conditions of water purity, temperature, and flow rate. Results: 1. None of the aluminum components, 63S fuel tube, 2S solid fillers and 43S spacers showed any corrosion effects beyond normal oxide film formation. This was carried out in flowing water, maintained at a specific resistivity greater than 1 x 10(6) ohm-cm, for four weeks. 2. No corrosion pitting was observed on any of the aluminum surfaces; all became covered with a uniform film of Al2O3.H2O. On the boat tails, where type 304 stainless steel fins were in galvanic contact with 2S aluminum, no pitting or preferential attack occurred."
Date:
May 1952
Creator:
Nielsen, N. A.
Object Type:
Report
System:
The UNT Digital Library
The Absorption Spectrum of Hydrated Americium Chloride
The following document focuses on the study of the absorption spectra of americium chloride. Large samples and a spectrograph of great dispersion were used.
Date:
May 2, 1952
Creator:
Stover, Betsy Jones & Conway, John G.
Object Type:
Report
System:
The UNT Digital Library
A Study of the Radiation Burst in the Hanford Homogeneous Reactor
Report discussing the details of a radiation burst in a spherical reactor using plutonium nitrate fuel that occurred on November 16, 1951 at Hanford Works.
Date:
May 2, 1952
Creator:
Leonard, B. R., Jr.
Object Type:
Report
System:
The UNT Digital Library
Decontamination of ORNL Purex Pilot Plant
From abstract: "This report describes the decontamination of Oak Ridge National Laboratory Purex Pilot Plant facilities and presents an appraisal of the decontaminating techniques and reagents which were employed."
Date:
May 5, 1952
Creator:
Wood, H. P.
Object Type:
Report
System:
The UNT Digital Library
Aircraft Nuclear Propulsion Project Quarterly Progress Report for Period Ending March 10, 1952
This quarterly progress discusses the ongoing work at the Oak Ridge National Laboratory for the quarter ending in March 10, 1952. Topics discussed include reactor theory and design, shielding research, materials research, and includes appendixes with supplemental information.
Date:
May 7, 1952
Creator:
Briant, R. C.; Miller, A. J. & Cottrell, William B.
Object Type:
Report
System:
The UNT Digital Library
Further Studies on Control of the Converter Reactor
Introduction: "This report is an extension of NAA-SR-Memo-178. The results show the number of control rods as a function of the amount of reactivity to be controlled. Numerical solutions are given for a typical example and are readily obtainable for other cases."
Date:
May 12, 1952
Creator:
Robinson, L. B.
Object Type:
Report
System:
The UNT Digital Library
Preliminary Leaching Investigation of Babrosco and Afrikander Lease Residues
Leaching and filtration tests were conducted on dump samples and current residues from Afrikander Lease and Babrosco properties on the Witwatersrand, South Africa.
Date:
May 12, 1952
Creator:
Hollis, R. F. & Lynch, J. T.
Object Type:
Report
System:
The UNT Digital Library
Proposed Method for Treating Hydrogen Displacement Effects in Critical Mass Measurements
This report discusses a proposed method for treating the effect of increasing critical mass of plutonium solutions, which occurs when hydrogen density is reduced by dilution with heavier nuclei.
Date:
May 13, 1952
Creator:
Gast, Paul F.
Object Type:
Report
System:
The UNT Digital Library
Aqueous Corrosion of Uranium and Alloys: Survey of Project Literature
This report describes corrosion rate of uranium in hydrogen-saturated water appears to be constant with respect to time after a brief induction period and to involve only one type of over-all reaction, in which pitting effects are slight or nonexistent.
Date:
May 14, 1952
Creator:
McWhirter, J. W. & Draley, Joseph Edward, 1919-
Object Type:
Report
System:
The UNT Digital Library
Poison Transient After Power Cutback and Its Effect on Reactivity
Report discussing the effects of xenon-135 and samarium-149 on the reactivity of nuclear reactors. The findings are presented in a "general manner, so as to be applicable to both the Converter and PuP Reactors."
Date:
May 14, 1952
Creator:
Roderick, C.
Object Type:
Report
System:
The UNT Digital Library
Radiations of 6.7d U²³⁷
Abstract: The radiations of U²³⁷ have been studied using a magnetic lens beta ray spectrometer and scintillation spectrometers for betas and gammas singly and in coincidence. A beta with an end point energy of 245 keV was found along with evidence for the existence of lower energy components. Gammas of energy 27, 42, 49, 59, 166, 208, 269, 354, 431, and 467 keV were found, and probably a gamma of 102 keV. The decay scheme constructed gives a total decay energy for this isotope of 512 keV.
Date:
May 14, 1952
Creator:
Wagner, F., Jr.; Freedman, M. S.; Engelkemeir, D. W. & Huizenga, John R.
Object Type:
Report
System:
The UNT Digital Library
The Determination of Rare Earths in Thorium
Abstract: "A quantitative method for the determination of individual rare earths in thorium down to a level of 0.05 ppm, is described. The procedure consists of a chromatographic cellulose-columns separation followed by a solution-type spectrographic determination. Values are given for the recovery of a number of rare earths using this combined procedure."
Date:
May 15, 1952
Creator:
Center, E. J.; Henry, W. M. & Householder, R. D.
Object Type:
Report
System:
The UNT Digital Library