Global ETD Search
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 1271 for “"Low energy"”.
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Møller scattering at low energy
… is an approximation that breaks down at relevant low energies. In this thesis, existing soft-photon radiative corrections were combined with new hard-photon bremsstrahlung calculations to take into account the effect of photon emission at any photon energy. The electron mass was included at all …
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Low energy neutron-proton interactions
… scattering and radiative capture below 1 MeV. Those measurements which do exist are at a small number of energies and are often inconsistent with theoretical models and with each other. We have conducted several experiments with the goal of obtaining improved data on these cross …
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Radiative Corrections to Low Energy Theorems
… The problem of radiative corrections to low-energy theorems is the primary concern of this investigation. The threshold contributions of intermediate soft photon states are non-analytic in the photon-frequency (ω). While the procedure is general enough to permit, in principle, the …
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Low Energy Positron Interactions With Biological Molecules
… containing C, H, O, and N. In order to allow consideration of positrons bound to extended molecules with regions of different character and no particular symmetry, atom-centered positron basis sets of Gaussian-type functions were developed for positrons bound to molecules containing O, N, …
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Low Energy Excitations of 1D Fermi Gases
… fermions using cold atom techniques and probe low-energy excitations in such systems. We do so using the technique of Bragg spectroscopy, which enables us to probe the dynamical structure factor of the system directly, which in turn tells us about the density-density and spin-density …
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Low-energy excitations in yttria-stabilized zirconia
… constant and thermal expansion measurements below 2 K on single crystal samples of Zr02 :Y203 with 10.5, 16 and 18 mole % Y2O3 contents exhibit properties typical of glasses. The presence of glass-like excitations having a broad spectrum of energies is indicated by the quadratic temperature …
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Low-energy, localized excitations in amorphous polymers
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-20T20:03:53Z No. of bitstreams: 1 1980_matsumoto.pdf: 4103014 bytes, checksum: 0ca927dd0f785f97fb48332794b75f28 (MD5)
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Relativistic theory of low energy electron diffraction
… relativistic effects in the diffraction of low energy electrons (LEED) by crystals composed of heavy atoms, a relativistic dynamical theory is developed for calculating LEED intensities and spin polarizations. The presentation of the general framework of solving the boundary value problem …
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Low-energy electron diffraction effects at complex interfaces
Low-energy electron scattering was used as a tool to study electron-stimulated processes at complex interfaces. The electron diffraction in each complex interface is theoretically treated by a multiple scattering formalism for quantitative analysis. Mathematical descriptions of electron-stimulated …
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Searching for the low-energy enhancement in 91zR
… the behaviour of a nucleus at high excitation energy. NLD is defined as the number of levels per unit of excitation energy. SF is de_ned as a measure of the average reduced decay probability of a nucleus. These concepts are useful at high excitation energies where the spacing between the levels …
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Gamma ray astronomy in the low energy range
A low energy gamma ray telescope, and the results of its observations are described. The telescope consisted of four sodium iodide crystals, each of 120 cm<sup>2</sup> area, occulted by lead discs. Charged particles are rejected using scintillation, anti-coincidence shields.<br/><br/>The telescope …
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Direct ray tracing for low energy electron microscopy
… used to calculate the aberration probe size of a low voltage scanning electron microscope mixed field objective lens, for which conventional methods of paraxial-perturbation breakdown. It was also used to plot through-the-lens scattered secondary electrons in such systems, simulating their radial …
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Low energy implantation of boron with decaborane ions
… of a novel approach to forming ultra shallow p-type junctions (tens of nm.) needed for future generations of Si MOS devices. In the new approach, B dopant atoms are implanted by cluster ions obtained by ionization of decaborane (B_{10}H_{14})vapor. Each B atom carries only ~9% of the …
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Reconstructing low-energy housing using ‘systems of practice’.
The residential sector accounts for a third of energy use in the UK (DECC, 2014b) and generates fifteen percent of greenhouse gas emissions (DECC, 2014c). Lowenergy housing is therefore critical to meeting climate change mitigation targets (DECC, 2011). New homes are required to be carbon-neutral …
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Data-Driven Methods for Low-Energy Nuclear Theory
… the configuration-interaction shell model, allows for detailed calculations of arbitrary scope. I lay out a simple framework for uncertainty quantification in empirical shell model calculations,thus providing not only error bars for large-scale calculations, but also insight for theory …
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Device management of heterogeneous Bluetooth Low Energy devices
… activities. As such, the advent of smart homes allows for the interconnectedness of all personal devices to be available on a unified platform. The efforts to unite all device management under a single banner has proven to be a difficult task, both in academia, and in consumer technologies. As …
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Low-Energy Ion-Induced Angularly-Resolved Sputtering Measurements
… the first to become available especially at the lower energies. The Al samples although polycrystalline, had grain preferences of (100) and (110). The Al (100) sample in particular shows enhanced sputtering along the $\langle$110$\rangle$ direction at all energies. Once these effects are …
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Ultra-low energy electronics for synthetic biological sensors
… This work explores the "functionalization" of low-power low-cost microelectronics with equally inexpensive genetically engineered whole-cell microbial sensors to aid in sensing the chemical domain. The driving application is an ingestible sensor for bleeding detection in the gastrointestinal …
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