Browsing Department of Physics and Astronomy by Title
Now showing items 40-59 of 238
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Determining the spectroscopic quadrupole moment of the first 2+ state in 36Ar
(University of the Western Cape, 2019)A series of reorientation-effect Coulomb-excitation experiments were carried out at iThemba LABS from April to May 2016. Enriched ion beams of Ar, Ar and S were bombarded at safe energies, well below the ... -
Developing a sorting code for Coulomb excitation data analysis
(University of the Western Cape, 2015)This thesis aims at developing a sorting code for Coulomb excitation studies at iThemba LABS. In Coulomb excitation reactions, the inelastic scattering of the projectile transfers energy to the partner nucleus (and ... -
Development and characterization of bioceramic coatings for medicall and dental applications
(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 ... -
Development and study of a Thoron (Rn-220) standard source
(University of Western Cape, 2019)Thoron Rn-220 is a radioactive gas with a half-life of 55.6 s. It has been identified as a possible health concern in specific places such as monazite processing plants and (rare-earth) mines. The short half-life of Rn-220 ... -
Directional correlation from oriented states and linear poralization measurements of Gamma Rays from 190T1
(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 ... -
Disentangling star formation and AGN activity in the GAMA (G23) region
(University of the Western Cape, 2021)Observations of galaxies at di↵erent wavelengths have shaped our understanding of their formation and evolution through time. The commonly derived parameters, such as stellar mass and star formation rate (SFR), rely on ... -
Dynamic variation of hydrogen dilution during hot-wire chemical vapour deposition of silicon thin films
(University of the Western Cape, 2013)This study reports on the effects of hydrogen dilution and deposition time on six silicon thin films deposited at six specific deposition regimes. The thin film properties are investigated via X-Ray diffraction analysis, ... -
E2/M1 mixing in the Jπ= 5/2+ to 3/2+ transition in 21Na and its relation to the 20Ne(p,y ) stellar reaction rate
(University of the Western Cape, 2022)In the above, M is the total mass of the molecular cloud, R is its radius, k is Boltzmann's constant, G is the gravitational constant, T is the cloud temperature, m is the mean molecular weight, and is the cloud molecular ... -
Effect of the additional electron acceptor in hybrid ZnO: P3HT:PCBM spin-coated films for photovoltaic application
(University of the Western Cape, 2015)In a quest for low operational and maintenance cost solar cell devices, organic photovoltaics remain a potential source of energy worthy to be explored. In order to generate cost- effective electricity from solar energy, ... -
Effect of zinc oxide nanoridge height on solar cell performance
(University of Western Cape, 2021)Environmentally friendly photovoltaic devices make use of solar radiation as the energy source to generate electricity. Organic solar cells (OSCs) have been making headway in the last decade due to their cost-effectiveness ... -
The effects of environment on radio-loud AGN activity in Stripe 82
(University of the Western Cape, 2016)We investigate the link between environment and radiative accretion efficiency using a sample of 8946 radio-loud AGN detected at 1 − 2 GHz in the SDSS Stripe 82 region. We quantify their environments using the surface-density ... -
The effects of reverse bias on the efficiency of dye solar cells
(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, ... -
The effects on student knowledge and engagement when using a culturally responsive framework to teach ASTR 101
(University of the Western Cape, 2020)The U.S. has a problem: it is not effectively utilizing all the bright young minds available to its science & engineering workforce. In 2012 the President’s Council of Advisors on Science and Technology (PCAST) reported ... -
Electrical resistivity of the kondo systems (Ce1−xREx)In3, RE = Gd, Tb, Dy AND Ce(Pt1−xNix)Si2
(University of the Western Cape, 2008)The present study investigates the strength of the hybridization by substituting Ce atom in Kondo lattice CeIn3 with Gd, Tb, and Dy and by changing the chemical environment around the Ce atom in substituting Pt with Ni in ... -
Emission of ³He ⁴He and ⁶He particles produce from the interaction of ¹²C with ⁹³Nb at 400 MeV incident energy
(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 ... -
An exploration of learning by women in the clothing and textile industry within the context of the National Skills Development Strategy
(University of the Western Cape, 2008)This study explored the learning experiences of black working class women in the context of the National Skills Development Strategy. The research focused firstly, on how the National Skills Development Strategy facilitated ... -
Exploration of several radiation-based analytical techniques to investigate chlorides and chlorides effects within concrete
(2007)In this study, the capabilities of Neutron Radiography (NRad) and -Tomography (NTomo), as well as X-ray Radiography (XRad) to investigate chlorides and chlorides corrosion effects within steel reinforced laboratory concrete ... -
Exploring poly (2, 5) benzimidazole enhanced with carbon nanotubes for space applications
(University of the Western Cape, 2023)This work explores using polymeric materials for space radiation shielding in low-earth orbit. Shielding against radiation is essential on any space mission. Low atomic number materials, such as hydrogen, have shown to be ... -
Fabrication and characterization of a solar cell using an aluminium p-doped layer in the hot-wire chemical vapour deposition process
(2010)When the amorphous silicon (a-Si) dangling bonds are bonded to hydrogen the concentration of the dangling bond is decreased. The resulting film is called hydrogenated amorphous silicon (a-Si:H). The reduction in the dangling ... -
Fabrication and characterization of a solar cell using an aluminium p-doped layer in the hot-wire chemical vapour deposition process
(University of the Western Cape, 2010)When the amorphous silicon (a-Si) dangling bonds are bonded to hydrogen the concentration of the dangling bond is decreased. The resulting film is called hydrogenated amorphous silicon (a-Si:H). The reduction in the dangling ...