Global ETD Search
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Showing 1 to 16 of 16 for “"defect production"”.
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Defect production in alkali halide crystals by monochromatic x and UV radiation
The spectral dependence of the F-center production efficiency of several alkali halides was observed in diverse parts of the electromagnetic spectrum. Using low flux monochromatic sources, this efficiency was measured in the hard x-ray region at the K-edge of bromine in KBr and in the near …
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Radiation-Enhanced Diffusion and Defect Production During Ion Irradiation of MgO and Al(2)O(3)
Radiation enhanced diffusion of O$\sp{18}$, Ca and Zn buried tracer layers in MBE grown MgO was measured following irradiation with either 2.0 MeV Kr or 1.0 MeV Ne, He or H from 30 to 1500$\sp\circ$C. This represents the first reported RED measurements on an oxide system. Ion beam mixing at …
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Defect Production in Alkali Halide Crystals by Monochromatic X and Ultraviolet Radiation (Photoluminescence, X-Ray Absorption, Spectra, Impurity)
The spectral dependence of the F-center production efficiency of several alkali halides was observed in diverse parts of the electromagnetic spectrum. Using low flux monochromatic sources, this efficiency was measured in the hard x-ray region at the K-edge of bromine in KBr and in the near …
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Modeling of Effect of Alloying Elements on Radiation Damage in Metallic Alloys
… the primary damage in Fe-based alloys, including defect production and dislocation loop transformations, and their connections with defect thermodynamics. First, effects of alloying elements on the primary damage in three Fe-based ferritic alloy systems were studied, with a particular focus on the …
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Ion Implantation Damage in Solids
… bombarded W showed the effect of the surface on defect production and the roughening of the surface. The simulations on the CuTi, Ag and Ni with amorphous and crystalline states reveal the smoothing and roughening process due to a single ion impact.
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Fission Gas Transport and Its Interaction With Irradiation Induced Defects in Lanthanum Doped Ceria
… into the understanding of the mechanisms of defect evolution in the materials investigated. A model including both defect production and annihilation mechanisms has been proposed to explain the observed defect kinetics in the lower dose regime. A coalescence driven model has been proposed for …
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Molecular dynamics simulations of the bombardment of iron by chromium ions.
… 700 K, the same as for adatom formation. Defect production, such as vacancies and interstitials, increase in general with energy, and their distribution profiles change with the crystal temperature.The directional effect on the bombardment of Fe(100) surface at temperature 700 K, with 2.4 …
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Surface Morphology Evolution of Epitaxial TiN(001) Layers Grown by Reactive Magnetron Sputtering
… in-plane length scales resulting from bulk defect production.
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Determination of UO2 thin films mechanical properties under heavy ion irradiation using nanoindentation and finite element modeling
… bubbles, displacement cascade damage, and point defect production by irradiation. The saturation of mechanical properties with dose is attributed to the high density of dislocations in the as-grown films. Irradiation at 600°C resulted in a decrease in the hardness and elastic modulus after …
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A systematic study of radiation enhanced diffusion; theoretical improvement and application
… traditional mean-field theory, which assumes all defects are produced uniformly and continuously in the form of Frenkel pairs under irradiation, the new model considers more realistic defect production processes based on many experimental and theoretical findings. In the new model, both clustered …
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Effects of electron irradiation on P-type germanium at liquid helium temperatures using AC hopping conductivity
… at pUmped liquid helium temperatures and defect production and annealing studied using ac hopping conductivity. Production rates obtained from measurements at 1.5 K and 104 Hz were .6 cm- l for samples doped 6 X 10 15 Ga/cm 3 and .11 cm -1 for samples doped 8 X 10 14 Ga/cm3. Above 1014 …
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Magnetic Resonance Studies of Inorganic Oxides and a New Pulse Programming System for Pulsed EMR
… suppress radiolytic unpaired electron and hole defect production which does take place in nominally vanadium-free NaPO$\sb3$ during small doses of gamma-radiation. We describe hardware and software developed for a pulse programming system for a pulsed S-band EMR spectrometer. This system …
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Fission gas transport and its interactions with irradiation-induced defects in lanthanum doped ceria
… fundamental mechanisms of irradiation-induced defect formation and evolution in nuclear fuel, similar combined modeling and experimental efforts have been carried out. Ceria (CeO2) was selected as a surrogate material for Uranium Dioxide (UO2) due to its many similar properties. Lanthanum (La) …
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The production and annealing of point defects produced by quenching and by tensile deformation in pure gold and silver
… energy is 0.70 ± .04 eV. The identity of defects taking part in stage III in silver is not clear at the present time.
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Defect engineering of InP and InGaAs for optoelectronic applications
… One branch of current research involves defect production and diffusion, which is known to greatly modify the electrical and optical properties of these semiconductors. Ion implantation is one way of introducing a large amount of defects, and a significant part of this work focuses on …
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Defect engineering of InP and InGaAs for optoelectronic applications
… One branch of current research involves defect production and diffusion, which is known to greatly modify the electrical and optical properties of these semiconductors. Ion implantation is one way of introducing a large amount of defects, and a significant part of this work focuses on …