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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 22 for “"lithium fluoride"”.
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Pipe Diffusion in Lithium-Fluoride
Made available in DSpace on 2015-05-12T17:12:22Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6100157.PDF: 2688214 bytes, checksum: 1c8733e4efd74ec9abe74eb5cc2558b8 (MD5) Previous issue date: 1960
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Initiating Event Analysis of a Lithium Fluoride Thorium Reactor
… is to perform an Initiating Event Analysis for a Lithium Fluoride Thorium Reactor (LFTR) as the first step of a Probabilistic Safety Assessment (PSA). The major objective of the research is to compile a list of key initiating events capable of resulting in failure of safety systems and release of …
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Limitation of lithium fluoride (LiF) properties for passivation layer in organic solar cells application
… are the most compatible. As a conclusion, Lithium Fluoride (LiF) prevent metal electrode from diffusing into PEDOT: PSS (poly (3,4-ethylenedioxythiophene) poly(styrenesulfonate)) and ITO (Indium Thin Oxide) because LiF is an interfacial chemistry model for metal cathode that act as a buffer …
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Temperature Dependence of the Dislocation Contribution to the Elastic Constants in Sodium-Chloride and Lithium-Fluoride
Made available in DSpace on 2015-05-12T22:38:51Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7310087.PDF: 3667646 bytes, checksum: 064a03839079bb42a062c950d23e72b4 (MD5) Previous issue date: 1972
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Cryogenic optical refrigeration
… cooling a 5 wt. % ytterbium doped yttrium lithium fluoride (Yb+3:YLF) crystal through anti-Stokes fluorescence to a new record low temperature. This is the coldest temperature to date, without the use of cryogens or mechanical refrigerators, and is achieved by taking advantage of the Stark …
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Cryogenic optical refrigeration: Laser cooling of solids below 123 K
… cooling a 10% wt. Ytterbium doped Yttrium Lithium Fluoride (Yb+3:YLF) crystal via anti-Stokes fluorescence to a record low temperature ~114(+\\-1)K (below NIST-defined cryogenic 123 K) from room temperature (ΔT ~185 K) in a single stage with a cooling power of 190mW. The demonstration of …
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Local excitons in insulators and impurity doped metals
… some alkali-halide insulators and impurity doped lithium metal are calculated using atomic clusters to simulate the bulk solid. The calculations are ab initio and use unrestricted Hartree-Fock and second order many body perturbation techniques. Accurate results are obtained for sodium fluoride by …
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An Improved Flexible Neutron Detector For Powder Diffraction Experiments
… shifting fibers embedded in a zinc-sulfide lithium-fluoride based scintillator. The virtue of this design is that the detecting surface can be curved around the Debye-Scherrer rings. This virtue is lacking in other detector designs, making them more complex and poorer in performance than our …
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Analysis of an Antineutrino Detector
… the positron through topology, and sheets of lithium-doped zinc sulfide to cleanly distinguish the neutron using pulse shape discrimination PSD. This dissertation talks about improvements made to the CHANDLER detector based on information gathered from its prototype, MiniCHANDLER, which saw a …
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Investigation by neutron diffraction utilizing white neutron radiation
… data obtained from single crystals of copper and lithium fluoride. Derivation of the relationship between the maximum in experimental count rate and the most probable velocity, an error analysis of the method, and the computer routine are given for the method used to obtain the most probable …
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The interaction of fast neutrons with shielding and fusion blanket materials
… from a graphite cube, and from natural uranium, lithium fluoride, graphite, lead and steel slabs bombarded with 14.1 MeV neutrons were measured to test nuclear data and calculational methods for D - T fusion reactor neutronics. The neutron spectra measured were performed by an organic …
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Elucidating Concentration and Temperature-dependent Energy Limitations of a Novel Fluorinated-organosulfur Catholyte for Li Primary Batteries
Increasing the energy density of Lithium (Li) primary batteries requires exploring novel electrochemical reactions. Herein, the novel Li–carbon cell with a liquid catholyte based on the reactant 4-nitrophenylsfur (NO₂-Ph-SF₅) is studied in detail with emphasis on its energy limitations under …
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In vivo imaging of cortical porosity by synchrotron phase contrast micro computed tomography
… propagation distance and used ion chamber and lithium fluoride crystal thermoluminescent dosimetry to measure the absorbed dose of my in vivo protocol as well as several ex vivo protocols using synchrotron phase contrast µCT at 5 µm, 10 µm, and 11.8 µm and conventional desktop in vivo protocols …
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Feasibility Study of a Natural Uranium Neutron Spallation Target using FLiBe as a Coolant
… research conducted was a feasibility study using Lithium Fluoride-Beryllium Fluoride (LiF-BeF2) or FLiBe as a coolant with a natural uranium neutron spallation source applied to an accelerator driven sub-critical molten salt reactor. The study utilized two different software tools, MCNPX 2.6 and …
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Specific Heat and Thermodynamic Properties of Metallic Systems: Instrumentation and Analysis
… heats of α-uranium, titanium diboride, and lithium flouride have been measured on a low-temperature, semi-adiabatic calorimeter down to 0.5 K. For the α-uranium, the specific heat of a polycrystalline sample was compared to that of a single crystal, and it was found that there was a …
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Studies of Used Fuel Fluorination and U Extraction Based on Molten Salt Technology for Advanced Molten Salt Fuel Fabrication
… third is a method of separating uranium (U) from lithium fluoride (LiF) and thorium fluoride (ThF4) salt also known as FLiTh for a thorium (Th) fuel cycle. The first technique proposed for UNF recycling was to use the cladding as an anode to oxidize the zircaloy and dissolve it into a LiF, sodium …
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Advancing inorganic perovskite solar cells for application in tandem architectures
… For p-i-n CsPbI2Br perovskite solar cells, a lithium fluoride interlayer between the perovskite and the CTL C60 improved the energy level alignment and decreased the defect density at the interface. Even though the VOC was improved by 110mV, a strong mismatch between quasi-Fermi level …
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Role of impurities, LiF, and processing on the sintering, microstructure, and optical properties of transparent polycrystalline magnesium aluminate (MgAl2O4) spinel, The
… LiF reacts with impurities to form volatile fluorides, and the temperature at which pressure is applied during hot-pressing determines the extent to which compact-scale differential sintering either traps LiF and volatile fluorides or allows their removal, the latter enabling transparency. …
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Melt Synthesis, Structural, Characterization and Scaling of Swelling 2:1-Layer Silicate Materials
… In particular, large scale syntheses of both lithium and sodium fluorohectorite were successfully achieved. Furthermore, the crystal structure of one-, and two-layer hydrate of sodium fluorohectorite and the one-layer hydrate of sodium brittle mica were thoroughly investigated and …
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