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79 Matching Results
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Recent Developments in the Physics and Safety of Large Fast Power Reactors
None
Date:
January 1, 1963
Creator:
Okrent, D.
System:
The UNT Digital Library
Bucklings, Disadvantage Factors, and /Delta/$Ssup 28$ Measurements in Some Undermoderated Slightly Enriched Cores
None
Date:
January 1, 1963
Creator:
Baird, Q. L. & Boynton, A. R.
System:
The UNT Digital Library
Equilibrium Studies of Uranyl Complexes. [Part] 2. Interaction of Uranyl Ion With Citric Acid
None
Date:
January 1, 1964
Creator:
Rajan, K. S. & Martell, A. E.
System:
The UNT Digital Library
EFFECT OF FLUORIDE IONS ON THE AQUEOUS CORROSION OF ZIRCONIUM ALLOYS
A review was made of the effects of fluoride ions on the corrosion behavior of zirconium alloys in high-temperature water. Corrosion was found to occur as the result of contamination of the water or the zirconium surface. A major source of fluorides is undue delay in rinsing the HF--HNO/sub 3/ pickling solution during surface preparation. The oxide on corrosion-resistant material has been found to contain up to 7600 ppm fluoride from this source. The threshold concentration of fluoride in the oxide film which produces poor corrosion resistance ranges from 8500 to 17,000 ppm. Accelerated corrosion from fluorides in water at 300 to 360 deg C occurs at about 100 ppm, although increased corrosion has been reported at 10 ppm fluoride in water at 300 deg C. Fluorocarbon plastics degrade and contribute fluorides to the hightemperature water or to the alloy surface when in direct contact with zirconium. Chlorides (1 to 10,000 ppm) and iodides (1270 ppm) do not adversely affect the corrosion behavior of zirconium alloys in water at 360 deg C. The mechanism of corrosion is not well understood but apparently is related to the formation of insoluble zirconium oxyfluorides during pickling and during exposure to fluoride- contaminated water. …
Date:
January 1, 1963
Creator:
Berry, W E
System:
The UNT Digital Library
Multiple Pion Production (Without Annihilation) in Anti P-P Collisions at 7 Bev/c
None
Date:
January 1, 1964
Creator:
Ferbel, T.; Firestone, A.; Johnson, J.; Kraybill, H.; Sandweiss, J. & Taft, H.D.
System:
The UNT Digital Library
Instrumentation for Fission Fragment Energy Correlation Experiments
From International Conference on Nuclear Physics with Reactor Neutrons, Argonne, Ill., Oct. 1963. Experiments were performed in which the kinetic energies of correlated fragment pairs from thermal- and resonance-neutron-induced fission were measured. In addition, a three-parameter ternary fission experiment was performed in which the energies of correlated fragments were measured in coincidence with the energy of a third emitted particle, usually a long-range alpha particle. The detectors were large-area silicon surface barrier detectors. The instrumentation associated with these experiments is discussed in detail. The complete system is described, with attention given to the problems of background reduction (fast-coincidence requirements), stability, linearity, and resolution. Particular attention is given to the reduction of spectrum distortion by pile-up pulses (alphaon-fission pile-up within the amplifier resolving time). Methods and limitations of pile-up detection are discussed. A new method for inspection and removal of pile-up pulses is described. (auth)
Date:
January 1, 1963
Creator:
Williams, C. W.; Schmitt, H. W.; Walter, F. J. & Neiler, J. H.
System:
The UNT Digital Library
Cell Proliferation in Germinal Centers of the Rat Spleen
None
Date:
January 1, 1963
Creator:
Fliedner, T. M.; Kesse, M.; Cronkite, E. P. & Robertson, J. S.
System:
The UNT Digital Library
THE DIFFUSION OF FAST NEUTRONS
From American Nuclear Society Meeting, New York, Nov. 1963. The use of the asymptotic solution to the one-velocity transport equation is considered. The angular distribution for fast neutron elastic scattering by heavy elements is discussed. An exponential angular distributi on is assumed to simplify the decay length calculation. The diffusion length of 1 to 15 Mev neutrons in iron is calculated, as well as the vector flux angular dependence. The asymptotic solution for an arbitrary angular distribution of a plane delta -function source is also found. An isotropic source is investigated, and some applications of the model are examined. (auth)
Date:
January 1, 1963
Creator:
Francis, N C; Brooks, E J & Watson, R A
System:
The UNT Digital Library
Multiperipheral Dynamics.
None
Date:
January 1, 1969
Creator:
Chew, G. F.
System:
The UNT Digital Library
Total Cross Sections of Protons, Antiprotons, π Mesons and K Mesons on Hydrogen and Deuterium in the Momentum Range 6-22 Gev/C
None
Date:
January 1, 1964
Creator:
Galbraith, W.; Jenkins, E.W.; Kycia, T.F.; Leontic, B.A.; Phillips, R.H.; Read, A.L. et al.
System:
The UNT Digital Library
New Measurements of Star Production in Nuclear Emulsions and Applications to High-Energy Neutron Spectroscopy.
None
Date:
January 1, 1969
Creator:
Patterson, H. W.; Heckman, H. H. & Routti, J. T.
System:
The UNT Digital Library
The Berkeley Synchrocyclotron Improvement Program.
None
Date:
January 1, 1969
Creator:
Kanstein, L.; Sorensen, R.; Glasgow, L.; Vale, J. & MacKenzie, K.
System:
The UNT Digital Library
STOPPING POWER, RANGE, AND TERMINAL IONIZATION OF ANY NUCLEUS WITH 0.01 TO 500 MeV/amu IN ANY NONGASEOUS MATERIAL, INCLUDING NUCLEAR EFFECTS.
None
Date:
January 1, 1969
Creator:
Wallace, R.; Litton, G. M. & Steward, P. G.
System:
The UNT Digital Library
Automatic Exit Steam Quality Control for Boiling Water Reactors
From American Nuclear Society Meeting, New York, Nov. 1963. The need for control of the flow distribution and/or steam quality in boiling reactors is discussed. A quality control device is being developed which consists of an entrance venturi and an exit venturi for measuring the flow rates into and out of the channel, means for comparing the two flow rate signals, and a value for regulating the flow rate. This device can be used either as a constantquality device or as a controlled-quality device. Results are given of air-water studies of two-phase flow in a vertical venturi. (D.L.C.)
Date:
January 1, 1963
Creator:
Gall, D. A. & Doyle, E. F.
System:
The UNT Digital Library
NEUTRON EXPERIMENTS WITH A TANDEM ACCELERATOR
l963. The Wisconsin tandem accelerator is used part of the time for experiments in neutron physics. In these experiments the properties of neutrons from charged-particle reactions as well as the interaction of neutrons with nuclei are studied. Some of the techniques used and some of the results obtained are described. (auth)
Date:
January 1, 1963
Creator:
Barschall, H H
System:
The UNT Digital Library
Fluxes and Reaction Rates in the Presence of Interferring Resonances
The effects of competition between resonances of different isotopes were investigated. Flux and reaction rate calculations on a Pu/sup 239/-- U/sup 238/ system revealed that U/sup 238/ exhibits both self-shielding and interference effects, the latter becoming noticeable at enrichnnents of a few per cent. Gold activation was also found to be depressed by the presence of U, but was insensitive at low enrichment values, Investigation of the Pu/sup 239/ resonance integral showed an asymmetric effect involving both interference between potential and resonant scattering and interferance with resonance absorption in another isotope. The interference scattering arising in each resonance level had a notable effect on the average change in the Doppler coefficient. (D.C.W.)
Date:
January 1, 1963
Creator:
Kelber, C. N.
System:
The UNT Digital Library
Wire Chamber-Computer System
None
Date:
January 1, 1963
Creator:
Bounin, J.; Miller, R.; Neumann, M.; Sarma, J. & Sherrard, H.
System:
The UNT Digital Library
Measurement Methods of Burnup and Heavy Element Isotopic Composition in Irradiated Power Reactor Fuels
Methods for determining the heavy element isotopic compositions and atom percent fission for reactor fuels are briefly described, and their accuracies are discussed. (D.C.W.)
Date:
January 1, 1963
Creator:
Rider, B. F.; Ruiz, C. P. & Alter, H. W.
System:
The UNT Digital Library
APPROXIMATE METHODS FOR CALCULATION OF INTRINSIC TOTAL-ABSORPTION- AND DOUBLE-ESCAPE-PEAK EFFICIENCIES FOR Ge(Li) DETECTORS.
None
Date:
January 1969
Creator:
Euler, B. A. & Kaplan, S. N.
System:
The UNT Digital Library
Production of Pions in [Pi]+P Collisions at 2.08 GeV/c
None
Date:
January 1, 1964
Creator:
James, F. E. & Kraybill, H. L.
System:
The UNT Digital Library
$pi$$sup +$p CROSS SECTIONS BELOW 4 Gev
None
Date:
January 1, 1964
Creator:
James, F. E.; Johnson, J. A. & Kraybill, H. L.
System:
The UNT Digital Library
THE ELECTRON THEORY OF SIMPLE METALS AND ALLOYS
The successes and difficulties of the Bloch model of a metal are briefly reviewed, and the Landau quasi-particle theory amd the pseudopotential theory are briefly discussed. These two notions are made the basis for a revised version of the Bloch model that avoids the conceptual difficulties of the original model, while retaining and explaining its appealing features. Well known empirical generalizations concerning the relative importance of conduction-electron density, composition, and structure for the electronic properties are presented, and their implications are reexamined. A theory of the form required by the empirical generalizations is developed. Recent approximate calculations are discussed, and a variety of conclusions are drawn from these relating to the possibility of explanation of the empirical generalizations by the theory. 42 references. (auth)
Date:
January 1, 1963
Creator:
Cohen, M H
System:
The UNT Digital Library
Some Experiences With Pulse Height Analysis Using a Disk.
None
Date:
January 1, 1969
Creator:
Jenson, D. W.
System:
The UNT Digital Library
Safety problems with abandoned explosive facilities
None
Date:
January 1, 1969
Creator:
Courtright, W.C.
System:
The UNT Digital Library