Now showing items 163-182 of 237

  • Probing the primordial Universe using the SKA in combination with other cosmological surveys 

    Matthewson, William (University of the Western Cape, 2019)
    Next-generation surveys of the large-scale structure of the Universe will be of great importance in allowing us to extract invaluable information about the nature of the Universe and the physical laws that govern it, at ...
  • 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 ...
  • Proton conductivity stability studies by modelling 

    Square, Lynndle Caroline (University of the Western Cape, 2016)
    In this thesis, some of the challenges experienced by high temperature polymer electrolyte membrane fuel cells are explored through material modelling techniques. A very important aspect for a fuel cell is that it should ...
  • Radio-optical analysis of extended radio sources in the first look survey field 

    Hons, Claudio Moises Paulo (2010)
    I combine 610 MHz Giant Metrewave Radio Telescope (GMRT) data, 1.4 GHz Very Large Array (VLA) data and 1.4 GHz Westerbork Synthesis Radio Telescope (WSRT) observations, encompassing a ∼ 4 square degree field (sq. deg. ...
  • Radiometric characterisation of vineyard soils, Western Cape, South Africa 

    Mlwilo, Nolasco Anton (University of the Western Cape, 2010)
    This study is aimed at investigating the feasibility of using the radiometric technique as an alternative to traditional methods for determining soil physico-chemical parameters which are important for terroir characterization. ...
  • Radiometric investigation of soil and beach sand in Zanzibar 

    Mohamed, Gharib Hamza (University of the Western Cape, 2020)
    This study presents the results of radiometric investigation of soil and beach sand in Zanzibar. The activity concentration of natural radionuclides (40K, and 232Th and 238U decay products) in beach sand and soil samples ...
  • 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 ...
  • Radon exhalation of building materials 

    Wentzel, Farrel Sidney (University of the Western Cape, 2018)
    Public concern about all radiation and radon exhalation from building materials has been highlighted recently. The purpose of this study is to address this public concern and to investigate the contribution of building ...
  • Radon exhalation studies for applications in low background environments. 

    Goitseona, Ramonnye .J; Ramonnye, Goitseona. J (University of the Western Cape, 2022)
    Neutrinoless double beta decay (0 ) is a rare process that is yet to be observed. Observation of neutrinoless double beta decays would imply lepton number violation, and that the neutrino is its own antiparticle ...
  • Radon exhalation studies for applications in low background environments. 

    Ramonnye, Goitseona. J (University of the Western Cape, 2023)
    Neutrinoless double beta decay (0νββ) is a rare process that is yet to be observed. Observation of neutrinoless double beta decays would imply lepton number violation, and that the neutrino is its own antiparticle (a Majorana ...
  • Radon in the Cango Caves 

    Nemangwele, Fhulufhelo (University of the Western Cape, 2005)
    Radon is a naturally occurring radioactive element in the 238U decay series that is found in high concentrations in certain geological formations such as Caves. Exposure to high concentrations of radon has been positively ...
  • Reconstruction of the ionization history from 21cm maps with deep learning 

    Mangena (University of the Western Cape, 2020)
    Upcoming and ongoing 21cm surveys, such as the Square Kilometre Array (SKA), Hydrogen Epoch of Reionization Array (HERA) and Low Frequency Array (LOFAR), will enable imaging of the neutral hydrogen distribution on ...
  • Redshift-space distortions as a probe of dark energy 

    Gouws, Liesbeth-Helena (University of Western Cape, 2014)
    We begin by finding a system of differential equations for the background and linearly perturbed variables in the standard, ɅCDM model, using the Einstein Field Equations, and then solving these numerically. Later, we ...
  • A relativistic analysis of proton-induced knockout reactions from oxygen isotopes with direct and inverse kinematics. 

    Motimele, Kanting Evidence (University of the Western Cape, 2020)
    In this study a complete set of exclusive (~p; 2p) polarization transfer observables of closed-shell oxygen isotopes are calculated using both direct and inverse kinematics using the relativistic plane wave impulse app ...
  • Relativistic corrections to the power spectrum 

    Duniya, Didam Gwazah Adams (University of the Western Cape, 2015)
    The matter power spectrum is key to understanding the growth of large-scale structure in the Universe. Upcoming surveys of galaxies in the optical and HI will probe increasingly large scales, approaching and even exceeding ...
  • Sample selection effects in laduma stacking experiments 

    Gwebushe, Lwandile (University of the Western Cape, 2023)
    This study explores the impact of selection effects introduced by input optical cata-logues on high-redshift stacking experiments. Using the Hi stacking technique, the Hi content of LADUMA synthetic data cubes is analyzed ...
  • Search for tetrahedral bands in yb isotopes 

    Maliage, Shumani Maurice (University of the Western Cape, 2007)
    Calculations by Dudek et al. predict shell gaps for tetrahedrally shaped nuclei at various proton and neutron numbers. 160Yb is expected to be a favourable nucleus, with tetrahedral bands predicted to lie 1 MeV above the ...
  • Selection and optimization of the seeding procedure prior to the synthesis of Pd-based membranes 

    Mc Donald, Earl (University of the Western Cape, 2014)
    Pd based membranes are known for their incredible selectivity towards H2. In order for Pd membranes to display high H2 selectivity, a defect free layer of Pd needs to be deposited onto a support. Although various fabrication ...
  • Signature splitting and inversion in the 186-194 Au Nuclei predicted by the total routhian surface (TRS) and cranked shell model (CSM) calculations 

    Shirinda, Obed (University of the Western Cape, 2007)
    The nearly oblate deformed Au nuclei show rotational bands built on multi quasiparticle excitations [Bou89, Bou92, Gue03, Gue01, Ven92]. Several of these bands are built on rotationally aligned high-j proton and neutron ...