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Showing 1 to 20 of 40 for “"SNO+"”.
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Hydrogen in transition metal doped transparent conductive oxide SnO₂
… results indicate that Mo-, W-, Nb-, F-doped SnO2 are the best doped-tin oxides at reducing hydrogen solubility in their matrices. We expect these oxides also to be the best for removing hydrogen via proton reduction and hydrogen evolution from their surfaces due to the relatively high …
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Quality Assurance Testing, and Sensitivity Studies for the SNO+ Experment
For the SNO+ experiment's search for neutrinoless double beta decay, radioactive background reduction and understanding of detector systematics are key. Indirect background measurements and energy systematics have been studied. A quality assurance testing system was created and implemented. The …
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Structural and Elastic Properties of Degenerate SnO Monolayers at Finite Temperature
… structure but without valence d-electrons, SnO monolayers also display a structural ground state with a degenerate rectangular unit cell at zero temperature and a charge-tunable energy barrier that leads to a thermally-controllable structural phase change. Doped SnO monolayers with …
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Influence of oxygen vacancies on oxygenate reactions over SnO₂(110) single crystal surfaces
… types of oxygen vacancies can be introduced onto SnO0₂ (110) surfaces, and the kinetics of the reactions of Brønsted acids is influenced by the number and type of oxygen vacancies present on each surface. The site requirement for dissociation of Brønsted acids has been described as a …
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The Development of the SNO+ Experiment: Scintillator Timing, Pulse Shape Discrimination, and Sterile Neutrinos
The SNO+ experiment is a multi-purpose neutrino detector which is under construction in the SNOLAB facility in Sudbury, Ontario. SNO+ will search for neutrinoless double beta decay, and will measure low energy solar neutrinos. This thesis will describe three main development activities for the SNO+ …
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Neutron Measurements and Reactor Antineutrino Search with the SNO+ Detector in the Water Phase
The SNO+ experiment is a large-scale liquid scintillator neutrino experiment with a wide range of physics objectives. SNO+ has adopted a staged approach where the detector was first filled with ultra-pure water before substituting with liquid scintillator and the target isotope $^{130}$Te for …
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Experiments and Monte Carlo Analysis for the Optical Properties of the Scintillator in SNO+
The SNO+ experiment will be the SNO detector filled with a neodymium-loaded liquid scintillator instead of heavy water. SNO+ will be used to detect neutrinos of much lower energy. Also, SNO+ will conduct a search for neutrinoless double beta decay with Nd-150. The Nd-loaded scintillator in SNO+ …
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Reactor Antineutrinos In The Sno+ Water Phase And Detector R&d For Large-Scale Neutrino Detectors
… two topics, both inspired by my work on the SNO+ experiment. First, I describe a search for reactor antineutrino interactions in the SNO+ water-filled detector using a 190.3 day dataset. Reactor neutrinos have never before been detected in a water Cherenkov detector, primarily due to the …
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Scanning Tunneling Microscopy and Adsorption Studies on Single-Crystal Metal Oxide Surfaces
Natural and synthetic SnO₂ samples were studied using scanning tunneling microscopy (STM). The SnO₂ surface flattens considerably following high temperature treatments up to 1500 K. The conductivity of the synthetic SnO₂ surface is significantly reduced following annealing at temperatures of …
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Interaction of Acid/Base Probe Molecules with Specific Features on Well-Defined Metal Oxide Single-Crystal Surfaces
… single crystal surfaces of Cu₂O (111), SnO₂ (110), and Cr₂O₃ (101̲2) were investigated for their acid/base properties by the interactions between the probe molecules and the well-defined surface features. The adsorption of NH₃ at cation sites was used to characterize the Lewis acidity of …
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Präparation und Charakterisierung von Cadmium-Stannat als alternatives transparentes leitfähiges Oxid
… und optische Charakterisierung von Cd 2 SnO 4 -Schichten (CTO). TEM- und GIXRD-Messungen zeigen, daß die Schichten aus Cd2 SnO 4 mit Anteilen von CdO bestehen. Schichtwiderstände von 14 Omega bei gleichzeitiger Transmission von 85% bei 550 nm wurden realisiert. Die Leitfähigkeit der …
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Micro/Nano-Scale Investigation on SN Alloys and SNO2 Nanowires
… The most commonly seen Sn-containing compound, SnO<sub>2</sub>, is in high demand as well due to its exceptional electronic and chemical properties. In addition, nanostructures of SnO<sub>2</sub> are intensively studied for their potential applications as solid-state sensors, transparent …
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Reactions of S-nitrosothiols with biomimetic iron complexes and other transition metals
… equipment. Chapter 3. Reactions of (PPN)(SNO) and (PPN)(SSNO) with HBF₄ and Biomimetic Iron Complexes. The biological relevance of HSNO as a transnitrosating was recently reported. The gas H₂S can perform an H+-NO+ exchange with an S-nitrosated serum albumin to form HSNO, which can cross …
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An Analysis of the 3-He Proportional Counter Data from the Sudbury Neutrino Observatory Using Pulse Shape Discrimination
… third phase of the Sudbury Neutrino Observatory (SNO) data. These counters were deployed in SNO's heavy water to independently detect neutrons produced by the neutral current interaction of 8-B solar neutrinos with deuterium. Previously published results from this phase were based on a spectral …
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Improving the selectivity of the radio-labelling of ion exchange resin tracers for positron emission particle tracking
… throughout, or even beyond, the lifespan of the SnO₂ ⁶⁸Ge/⁶⁸Ga generator which degrades over time. The objective 1s achieved by integrating a purification technique into a "standard" radiolabelling method used at iThemba LABS. A small 0.5 ml Amberchrom CG-71 column is loaded with the ⁶⁸Ga …
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Metal oxide thin film transistors for CMOS applications
… (a-ISO) and p-type tin monoxide (SnO) TFTs were fabricated and studied in detail. Both these oxides are excellent candidates for low-cost, low-power, flexible CMOS technology which is essential to reduce the power consumption of flexible processors. All oxide CMOS inverters were …
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Deposition of p-type metal oxide semiconductors for large-area electronic display and solar cell applications
… and high carrier localisation. However, Cu₂O and SnO have emerged as promising, naturally p-type metal oxides, with lower hole localisation due to hybridisation of the valence band maximum. Therefore, work within this project has been focussed on the deposition of these materials using industry …
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Spatially Resolved Charge Transport and Recombination in Metal-Halide Perovskite Films and Solar Cells
… electron- and hole-selective materials of SnO$_{x}$ and NiO$_{x}$, respectively. Upon illumination, electrons (holes) generated over SnO$_{x}$ (NiO$_{x}$) rapidly transfer to the buried collection electrode, leaving holes (electrons) to diffuse laterally as majority carriers in the …
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Looking for matter enhanced neutrino oscillations via day v. night asymmetries in the NCD phase of the Sudbury Neutrino Observatory
… is measured at the Sudbury Neutrino Observatory (SNO). To be able to distinguish an actual discrepancy from an artifact, the detector properties and backgrounds are studied in regard to both a diurnal difference and a difference in the detector for upgoing v. downgoing neutrinos. This thesis …
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High-Speed and High-Sensitivity Metal-Semiconductor-Metal Photodetectors for Optoelectronic Integrated Circuit Applications
… of combinations of $\rm In\sb2O\sb3,$ CdO, and SnO$\sb2$ achieved responsivities of up to 0.69 A/W at a wavelength of 1.3 $\mu$m. Modifications to the layout of the conventional MSMPD enabled enormous reductions in dark current to be obtained. These modifications afford a reduction in dark …
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