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Neutron scattering experiments on well-staged graphite - FeCl/sub 3/

Description: This paper reports results of a neutron diffraction study on both the magnetic and the lattice dynamic structure of graphite-FeCl/sub 3/. The FeCl/sub 3/ system was selected for this study because of the interesting magnetic properties previously reported for this system. Of particular interest is the low temperature magnetic phase transition, which has been shown to be stage dependent. Special emphasis was given to the study of the low temperature magnetic state of the Fe/sup 3 +/ spins and to… more
Date: January 1, 1981
Creator: Axe, J.D.; Majkrzak, C.F.; Passell, L.; Satija, S.K.; Dresselhaus, G. & Mazurek, H.
Partner: UNT Libraries Government Documents Department
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Radiation damage studies related to nuclear waste forms

Description: Much of the previously reported work on alpha radiation effects on crystalline phases of importance to nuclear waste forms has been derived from radiation effects studies of composite waste forms. In the present work, two single-phase crystalline materials, Gd/sub 2/Ti/sub 2/O/sub 7/ (pyrochlore) and CaZrTi/sub 2/O/sub 7/ (zirconolite), of relative importance to current waste forms were studied independently by doping with /sup 244/Cm at the 3 wt % level. Changes in the crystalline structure me… more
Date: December 1, 1981
Creator: Gray, W.J.; Wald, J.W. & Turcotte, R.P.
Partner: UNT Libraries Government Documents Department
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Some reduced ternary and quaternary oxides of molybdenum containing strong metal-metal bonds. [Molybdates of ScZn, LiZn, Zn, Ba, and Na]

Description: ScZnMo/sub 3/O/sub 8/, LiZn/sub 2/Mo/sub 3/O/sub 8/, and Zn/sub 3/Mo/sub 3/O/sub 8/ were synthesized and crystal structures were determined for the latter two. These oxides contain the same type of triangular molybdenum atom clusters found in Zn/sub 2/Mo/sub 3/O/sub 8/, but each of the trimeric clusters has available one or two additional electrons for participation in metal-metal bonding. Another new ternary oxide containing discrete metal atom clusters is Ba/sub 1/ /sub 14/Mo/sub 8/O/sub 16/.… more
Date: October 1, 1981
Creator: Torardi, C.C.
Partner: UNT Libraries Government Documents Department
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Influence of chemical characterization of oil shale solids on understanding water quality impacts

Description: Synfuels technologies will yield products and effluents that are a function of the raw material being processed and the process variables. Chemical and mineralogic characterization of solids generated in synfuels production provide valuable insight into health and environmental impacts associated with synfuels processing (coal liquefaction or gasification and shale oil extraction). This report deals with considerations relating to leachate generation from solid wastes, but the suggested researc… more
Date: January 1, 1981
Creator: Peterson, E. J. & Wagner, P.
Partner: UNT Libraries Government Documents Department
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Examination of sample of grout after 63 years exposure underground. Technical report

Description: During an investigation of the Troy Lock and Dam, New York, a core was recovered that contained part of a metal anchor that had been grouted into foundation rock. Since this grout was about 63 years old and had presumably been continuously below the water table, it provided an opportunity to study the effect of this environment for this period of time on the phase composition and microstructure of this grout. The phase composition of the grout was studied by x-ray diffraction; its microstructur… more
Date: May 1, 1981
Creator: Rhoderick, J.E.
Partner: UNT Libraries Government Documents Department
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Crystal and molecular structures of selected organic and organometallic compounds and an algorithm for empirical absorption correction

Description: Cr(CO)/sub 5/(SCMe/sub 2/) crystallizes in the monoclinic space group P2/sub 1//a with a = 10.468(8), b = 11.879(5), c = 9.575(6) A, and ..beta.. = 108.14(9)/sup 0/, with an octahedral coordination around the chromium atom. PSN/sub 3/C/sub 6/H/sub 12/ crystallizes in the monoclinic space group P2/sub 1//n with a = 10.896(1), b = 11.443(1), c = 7.288(1) A, and ..beta.. = 104.45(1)/sup 0/. Each of the five-membered rings in this structure contains a carbon atom which is puckered toward the sulfur… more
Date: October 1, 1981
Creator: Karcher, B.
Partner: UNT Libraries Government Documents Department
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Advanced research and technology development fossil energy materials program. Quarterly progress report for the period ending September 30, 1981

Description: This is the fourth combined quarterly progress report for those projects that are part of the Advanced Research and Technology Development Fossil Energy Materials Program. The objective is to conduct a program of research and development on materials for fossil energy applications with a focus on the longer-term and generic needs of the various fossil fuel technologies. The program includes research aimed toward a better understanding of materials behavior in fossil energy environments and the … more
Date: December 1, 1981
Creator: Bradley, R.A. (comp.)
Partner: UNT Libraries Government Documents Department
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Structural studies of intercalants

Description: The structure of stage 2 potassium intercalated graphite, KC/sub 24/, is discussed in both the ordered and disordered phases. A one-dimensional model is used to illustrate the qualitative features of the KC/sub 24/ diffraction patterns.
Date: January 1, 1981
Creator: Hastings, J.B.
Partner: UNT Libraries Government Documents Department
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Quantum chromodynamics and hadronic interactions at short distances

Description: A brief introduction to QCD and asymptotic freedom is given. A new method to avoid scheme and scale ambiguities in perturbative QCD predictions is discussed. A detailed discussion of light-cone perturbation theory and the Fock state expansion of hadronic wavefunctions is given. The QCD equation of motion is also discussed. Measures of the hadronic wavefunction (form factors, magnetic moments, etc.), and the QCD analysis of high momentum transfer exclusive processes are discussed. It is also sho… more
Date: January 1, 1981
Creator: Brodsky, S.J.; Huang, T. & Lepage, G.P.
Partner: UNT Libraries Government Documents Department
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Mobile ion distribution and anharmonic thermal motion in fast ion conducting Cu/sub 2/S

Description: A unique model was determined for the mobile copper ion disorder in hexagonal Cu/sub 2/S between 120/sup 0/ and 325/sup 0/C via single crystal neutron diffraction. The copper ions partially occupy two sets of three-coordinated sites within the HCP sulfur array and display anharmonic thermal motion. The results suggest that the conductivity is two dimensional in nature.
Date: January 1, 1981
Creator: Cava, R. J.; Reidinger, F. & Wuensch, B. J.
Partner: UNT Libraries Government Documents Department
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Effects of composition on properties in an 11-component nuclear waste glass system

Description: Ninety simplified nuclear waste glass compositions within an 11-component oxide composition matrix were tested for crystallinity, viscosity, volatility, and chemical durability. Empirical models of property response as a function of glass composition were developed using statistical experimental design and modeling techniques. A new statistical technique was developed to calculate the effects of oxide components on each property. Independent melts were used to check the prediction accuracy of t… more
Date: September 1, 1981
Creator: Chick, L. A.; Piepel, G. F.; Mellinger, G. B.; May, R. P.; Gray, W. J. & Buckwalter, C. Q.
Partner: UNT Libraries Government Documents Department
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Observing solitons in one dimensional magnetic systems

Description: Classical models of one dimensional magnetic systems show that in addition to the linear spin wave excitations, there should exist localized, large amplitude excitations, that can move along the chains while retaining their integrity. It is expected that these excitations, solitons, exist in real materials. The progress that has been made to date in observing solitons in one dimensional magnets by means of neutron scattering, and the difficulties that still remain in unambiguously identifying t… more
Date: January 1, 1981
Creator: Reiter, G.
Partner: UNT Libraries Government Documents Department
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Instrument for liquids, amorphous and power diffraction

Description: A time-of-flight diffractometer, which has been built at the Los Alamos pulsed neutron source, is described. The concept of resolution focussing is discussed and the application of the instrument to liquid structure over a broad range of momentum transfers is presented.
Date: January 1, 1981
Creator: Soper, A.K.
Partner: UNT Libraries Government Documents Department
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Physical and chemical characterization and comparison of solids, liquids, and oils derived from Estonian and Green River formation shales

Description: Although only a single Estonian raw shale sample with an unknown history has been examined, physical and chemical characterization of this material has been accomplished. A comparison with a representative Green River formation raw shale has been made. Some of the findings are: (1) Elemental analysis indicates that the major elements, aluminum, magnesium, and sodium are deficient in Estonian shale compared to the Green River shale. The minor elements, barium and strontium, and the trace element… more
Date: January 1, 1981
Creator: Peterson, E. J. & Spall, W. D.
Partner: UNT Libraries Government Documents Department
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Theory of hadronic production of heavy quarks

Description: Conventional theoretical predictions for hadronic production of heavy quarks (Q anti Q) are reviewed and confronted with data. Perturbative hard scattering predictions agree qualitatively well with hidden Q anti Q production (e.g., psi, chi, T) whereas for open Q anti Q-production (e.g., pp ..-->.. ..lambda../sub c//sup +/X) additional mechanisms or inputs are needed to explain the forwardly produced ..lambda../sub c//sup +/ at ISR. It is suggested that the presence of c anti c-pairs on the 1 t… more
Date: July 1, 1981
Creator: Peterson, C.
Partner: UNT Libraries Government Documents Department
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Alpha decay self-damage in cubic and monoclinic zirconolite

Description: Samples of primarily-monoclinic /sup 238/Pu-doped zirconolite were stored at ambient temperature to allow accumulation of alpha decay self-damage to a dose of 1 x 10/sup 24/ ..cap alpha../m/sup 3/ (equivalent to a SYNROC age of approx. 10/sup 3/y). Bulk swelling reached 2.3 vol% with no tendency toward saturation, a damage response similar to that observed for cubic Pu-doped zirconolite. X-ray volumetric swelling at 4 x 10/sup 24/ ..cap alpha../m/sup 3/ was 1 vol%, considerably less than that f… more
Date: January 1, 1981
Creator: Clinard, F.W. Jr.; Land, C.C.; Peterson, D.E.; Rohr, D.L. & Roof, R.B.
Partner: UNT Libraries Government Documents Department
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Low-p/sub t/ physics

Description: This group examined the processes with large cross sections, namely total cross sections, elastic scattering, particle production at low p/sub t/ and diffraction excitation. These are fundamental processes whose experimental study has always been one of the main aims of the physics program of each new accelerator in a new energy domain. The main features of these large cross section processes may be studied experimentally using relatively simple set ups at an early stage of phase I Isabelle ope… more
Date: January 1, 1981
Creator: Braccini, P. L.; Chau, L. L.; Giacomelli, G.; Kycia, T. F.; Lindenbaum, S. J.; Longacre, R. S. et al.
Partner: UNT Libraries Government Documents Department
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Angular Distribution and Atomic Effects in Condensed Phase Photoelectron Spectroscopy

Description: A general concept of condensed phase photoelectron spectroscopy is that angular distribution and atomic effects in the photoemission intensity are determined by different mechanisms, the former being determined largely by ordering phenomena such as crystal momentum conservation and photoelectron diffraction while the latter are manifested in the total (angle-integrated) cross section. In this work, the physics of the photoemission process is investigated in several very different experiments to… more
Date: November 1, 1981
Creator: Davis, R. F.
Partner: UNT Libraries Government Documents Department
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Petrographic, mineralogical, and chemical characterization of certain Alaskan coals and washability products. Final report, July 11, 1978-October 11, 1980

Description: Petrological, mineralogical and chemical characterization provides basic information needed for proper utilization of coals. Since many of these coals are likely to be beneficiated to reduce ash, the influence of coal washing on the characteristics of the washed product is important. Twenty samples of Alaskan coal seams were used for this study. The coals studied ranged in rank from lignite to high volatile A bituminous with vitrinite/ulminite reflectance ranging from 0.25 to 1.04. Fifteen raw … more
Date: May 1, 1981
Creator: Rao, P.D. & Wolff, E.N.
Partner: UNT Libraries Government Documents Department
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Automated x-ray diffraction technique for quantitative determination of crystalline phases in glass containing simulated nuclear waste

Description: The Savannah River Laboratory is developing methods for incorporating nuclear defense waste into a suitable solid form for ultimate disposal. Borosilicate glass is currently the reference form for this study. Crystalline phases can influence important properties of the glass. Therefore, automated x-ray diffraction techniques have been developed to identify and determine the percentages of crystalline phases in the glass form for defense waste.
Date: January 1, 1981
Creator: Osgood, B. C.; Mosley, W. C. & Cochrane, F. A.
Partner: UNT Libraries Government Documents Department
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Materials characterization center workshop on compositional and microstructural analysis of nuclear waste materials. Summary report

Description: The purpose of the Workshop on Compositional and Microstructural Analysis of Nuclear Waste Materials, conducted November 11 and 12, 1980, was to critically examine and evaluate the various methods currently used to study non-radioactive, simulated, nuclear waste-form performance. Workshop participants recognized that most of the Materials Characterization Center (MCC) test data for inclusion in the Nuclear Waste Materials Handbook will result from application of appropriate analytical procedure… more
Date: June 1, 1981
Creator: Daniel, J. L.; Strachan, D. M.; Shade, J. W. & Thomas, M. T.
Partner: UNT Libraries Government Documents Department
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Examinations of samples of Bell Canyon Test 1-FF grout

Description: Portland cement grout identified as BCT-1-FF (Bell Canyon Test 1-FF) was used in borehole plugging experiments of the Bell Canyon Tests in Holl AEC-7 at the Waste Isolation Pilot Plant site in New Mexico during September 1979 and February 1980. This grout was made with fresh water. A study of this grout was begun in August 1979 in the laboratory to evauate the possible effects of temperature, pressure, and storage in fresh water or simulated groundwater (brine) on its phase composition and comp… more
Date: May 1, 1981
Creator: Rhoderick, J. E.; Wong, G. S. & Buck, A. D.
Partner: UNT Libraries Government Documents Department
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Near neighbor separations of surface atoms. Progress report

Description: The construction phase of the work to develop a technique to measure near-neighbor distances of low-Z atoms that are adsorbed at solid surfaces is nearly complete. The instrument will measure EXAFS-like variations that are associated with core-level loss features in the secondary yield of high-energy electrons. The goal is to then combine the knowledge of these spacings with analysis of electron diffraction data to determine the structure of surfaces. The apparatus that was constructed is descr… more
Date: January 1, 1981
Partner: UNT Libraries Government Documents Department
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