Browsing Magister Scientiae - MSc (Physics) by Author "Dept. of Physics"
Now showing items 1-20 of 27
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Determination of natural radioactivity concentrations in soil: a comparative study of Windows and Full Spectrum Analysis
Maphoto, Katse Piet (University of the Western Cape, 2004)In this study, two methods of analysing activity concentrations of natural radionuclides (U, Th and K) in soil are critically compared. These are the Window Analysis (WA) and Full Spectrum Analysis (FSA). In the usual WA ... -
Determination of the gas-flow patterns inside the hot-wire chemical vapor deposition system, using computational fluids dynamics software (fluent)
Wittes, Thobeka (University of the Western Cape, 2009)Computational Fluid Dynamics is the analysis of a system involving fluid flow, heat transfer and associated phenomena such as chemical reactions by means of a computer-based simulation. The simulations in this study are ... -
Determination of the photopeak detection efficiency of a HPGe detector, for volume sources, via Monte Carlo simulations
Damon, Raphael Wesley (University of the Western Cape, 2005)The Environmental Radioactivity Laboratory (ERL) at iThemba LABS undertakes experimental work using a high purity germanium (HPGe) detector for laboratory measurements. In this study the Monte Carlo transport code, MCNPX, ... -
Development and characterization of bioceramic coatings for medicall and dental applications
Mudenda, Steven (University of the Western Cape, 2007)Hydroxyapatite (HA), which is a natural component of bone tissue, is already being marketed as a coating for the metal shafts of hip implants as well as dental screws and other endoprostheses with the expectation of improved ... -
Directional correlation from oriented states and linear poralization measurements of Gamma Rays from 190T1
Madiba, Tshifhiwa Elmon (University of the Western Cape, 2008)High-spin states in the oblate deformed odd-odd thallium nucleus ( ) 109 190 81 Tl have been investigated through the reaction 175Lu(20Ne, 5n)190Tl at a beam energy of 115 MeV. The gamma rays emitted from 190Tl nucleus ... -
The effects of reverse bias on the efficiency of dye solar cells
le Roux, Lukas Johannes (University of the Western Cape, 2009)Dye-sensitised solar cells (DSC) have attracted much attention during the last few years due to their high efficiencies and their potentially low production costs. The technology is based on a thin layer of nano sized, ... -
Emission of ³He ⁴He and ⁶He particles produce from the interaction of ¹²C with ⁹³Nb at 400 MeV incident energy
Mudau, Lufuno Julia (University of the Western Cape, 2005)The inclusive double di®erential cross sections of 3He, 4He, and 6He par- ticles produced from the interaction of 12C with 93Nb at 400 MeV incident energy were extracted from the prescaled singles spectra which were ... -
Filament carburization during the hot-wire chemical vapour deposition of carbon nanotubes
Oliphant, Clive Justin (University of the Western Cape, 2008)This study reports on the changes in the structural properties of a tungsten-filament when exposed to a methane / hydrogen ambient for different durations at various filament-temperatures. -
Gamma spectroscopy of the doubly– ODD 194Tl Nucleus
Ramashidzha, Tshifhiwa Marius (University of the Western Cape, 2006)The odd – odd Tl nuclei with A ≥ 190 have moderate oblate nuclear deformation and show rotational bands built on different quasiparticle excitations. Several phenomena, not yet fully understood, were observed in these ... -
Hot-wire chemical vapour deposition of carbon Nanotubes
Cummings, Franscious Riccardo (University of the Western Cape, 2006)In this study we report on the effect of the deposition parameters on the morphology and structural properties of CNTs, synthesized by means of the hot-wire chemical vapour deposition technique. SEM, Raman and XRD results ... -
In-situ measurements of radon concentrations in soil gas at a site on the Cape Flats
Manavhela, Ramudzuli Fijiant (University of the Western Cape, 2007)Measurements of radon (222Rn) concentration in soil gas are routinely used to locate geological fault zones. This study was undertaken to investigate the systematic effects that influence radon soil-gas measurements, in ... -
Intense pulsed neutron generation based on the principle of Plasma Immersion Ion Implantation (PI3) technique
Motloung, Setumo Victor (University of the Western Cape, 2006)The development of a deuterium-deuterium/ tritium-deuterium (D-D/ D-T) pulsed neutron generator based on the principle of the Plasma Immersion Ion Implantation (PI3) technique is presented, in terms of investigating ... -
Low temperature growth of Amorphous Silicon thin film
Malape, Maibi Aaron (University of the Western Cape, 2007)The growth of amorphous hydrogenated silicon (a-Si:H) thin films deposided by hot wire chemical vapor deposition (HWCVD) has been studied. The films have been characterised for optical and structural properties by means ... -
Modeling of the dispersion of radionuclides around a nuclear power station
Dinoko, Tshepo Samuel (University of the Western Cape, 2009)Nuclear reactors release small amounts of radioactivity during their normal operations. The most common method of calculating the dose to the public that results from such releases uses Gaussian Plume models. We are ... -
Modelling and measurement of radon diffusion through soil for application on mine tailings dam
Speelman, Wilcot John (University of the Western Cape, 2004)Radon has been identified as an important factor that could result in a health hazard by studies all around the world. The health risks can be minimised by preventive measures where radon is highly concentrated as in some ... -
Modelling radio galaxies in the Millennium simulation: SKA/MeerKAT sources and CMB contaminants
Ramamonjisoa, Fidy Andriamanankasina (University of the Western Cape, 2010)We investigate the modelling of radio galaxies within a semi-analytic framework in the Millennium Simulation of the Virgo Consortium. The aim is to assess the radio sources contamination of Sunyaev-Zeldovich (SZ) signatures ... -
Optical emission spectroscopy of laser induced plasmas containing carbon and transitional metals
Motaung, David Edmond (University of the Western Cape, 2008)The spectroscopic, SEM and Raman measurements on carbon nanotubes under the exact conditions of which OES analysis were made showed that at a pressure of 400 Torr and a flow rate of 200 sccm, the quality and quantity of ... -
Production of Li, Be and B nuclei in the interaction of 12C with 12C at incident energies of 200 and 400 MeV
Mira, Joele Paulus (University of the Western Cape, 2008)The objective of this project is to study the production of Li, Be and B isotopes emitted in the interaction of 12C with 12C at incident energies of 200 and 400 MeV.The energies of these produced fragments were measured ... -
Radiometric study of soil: the systematic effects
Joseph, Angelo Daniel (University of the Western Cape, 2007)The natural 238U, 232Th and 40K radioactive content of vineyard soil was measured with an in-situ gamma-ray detector. The activity concentrations measured with the in-situ detector are normalized using the laboratory-determined ... -
Radon escape from water
Mvelase, Mashinga Johannes (University of the Western Cape, 2010)This thesis aims to measure the rate of radon loss from water in a systematic way. The dependence on surface area, temperature and concentration will be investigated. The experiments were done at UWC by creating radon using ...