Masters Degrees (Physics)

 

Recent Submissions

  • Feasibility study of the (α,α'γ) reaction at θlab = 0º using the K600 magnetic spectrometer 

    Erasmus, Wade Luke (Stellenbosch : Stellenbosch University, 2015-04)
    ENGLISH ABSTRACT: The coincident measurement of gamma-rays originating from nuclei excited in light-ion reactions and scattered alpha-particles presents interesting opportunities to characterize the decay path for low ...

  • Construction and characterization of a multi-antenna terahertz time-domain spectroscopy setup 

    Smith, Shane Raymond (Stellenbosch : Stellenbosch University, 2015-04)
    ENGLISH ABSTRACT: Recent progress in laser and semiconductor technology has allowed for far easier generation and measuring of coherent terahertz radiation, a previously difficult region in the radiation spectrum to ...

  • Spectral characterization of materials using terahertz time domain spectroscopy (THz-TDS) 

    Hissen, Huzifa Zain Alabdeen Abdarahman (Stellenbosch : Stellenbosch University, 2014-12)
    ENGLISH ABSTRACT: Terahertz (THz) radiation is often used in many promising applications such as information and communication technology and airport security. Optimized and adapted terahertz fields hold huge promise for ...

  • A new femtosecond electron diffractometer for structural dynamics experiments at cryogenic temperatures 

    Smit, Albert Bart (Stellenbosch : Stellenbosch University, 2014-12)
    ENGLISH ABSTRACT: In this thesis, a femtosecond electron diffraction (FED) set-up that is capable of investigating the photo-induced switching of Cu(DCNQI)2 from being an insulator to being a conductor is presented. ...

  • Vacuum polarisation energies of two interacting scalar fields with a mass gap in (1 + 1) dimensions 

    Capraro, Martin Horst (Stellenbosch : Stellenbosch University, 2014-12)
    ENGLISH ABSTRACT: The tools of perturbative Quantum Field Theory are by now a standard part of the theoretical physicist's arsenal. In this thesis we investigate the spectral method, an approach that uses tools from the ...

  • Structural dynamics of 1T-TiSe2 using femtosecond electron diffraction 

    Suleiman, Aminat Oyiza (Stellenbosch : Stellenbosch University, 2014-12)
    ENGLISH ABSTRACT: Trilayered transition metal dichalcogenides such as our sample (1T-TiSe2) have been studied for many years as systems with strong electron-electron and electron-phonon correlations. The main attraction ...

  • Introducing organic molecular crystals into ultrafast electron diffraction 

    Rohwer, Andrea Berenike (Stellenbosch : Stellenbosch University, 2014-12)
    ENGLISH ABSTRACT: Organic molecular salts have a wide range of physical properties which can be chemically tailored by minor variations of their substituents. These characteristics include high degrees of anisotropy, electrical ...

  • Cluster model analysis of exotic decay in actinide nuclei 

    Du Toit, Erasmus Johannes (Stellenbosch : Stellenbosch University, 2014-12)
    ENGLISH ABSTRACT: The binary cluster model is used to investigate the properties of exotic structures and decays in various nuclei. A simple method is described to choose the possible clusters forming within the nucleus, ...

  • Development of VUV tunable laser spectroscopy techniques for characterizing calcium fluoride 

    Matindi, Tresor (Stellenbosch : Stellenbosch University, 2014-12)
    ENGLISH ABSTRACT: The large band gap (approximately 11.5-12.1 eV) and high transmission of calcium fluoride (CaF2) crystal in the ultraviolet (UV) and vacuum ultraviolet (VUV) region makes it an important material for ...

  • Microdosimetric studies of Auger electrons from DNA-incorporated 123-I using the micronucleus assay and the Geant4 Monte Carlo simulation tookit 

    Fourie, Hein (Stellenbosch : Stellenbosch University, 2014-12)
    ENGLISH ABSTRACT: This study’s focus is on the determination and quantization of radiation damage on a cellular level due to the decay of the Auger electron-emitting 123I and the replication of this energy deposition using ...

  • Photoinduced charge dynamics in indoline-dye sensitised solar cells 

    Minda, Iulia (2014-12)
    ENGLISH ABSTRACT: The demand for renewable energy sources has grown out of the humanity’s increasing need for electricity as well as depleting fossil fuel reserves. Organic-dye sensitised solar cells were developed as a ...

  • Translocation of a polymer chain under geometric confinement 

    Gumede, Sthembiso R. (Stellenbosch : Stellenbosch University, 2014-04)
    ENGLISH ABSTRACT: The advent of the synthesis or manufacturing of controlled structures on submicron scales as well as experimental developments enabling the investigation of physics in speci c biological systems at ...

  • Portable X-ray fluorescence and nuclear microscopy techniques applied to the characterisation of southern African rock art paintings 

    Steyn, Ruan (Stellenbosch : Stellenbosch University, 2014-04)
    ENGLISH ABSTRACT: Non-destructive portable X-ray Fluorescence (pXRF) and Particle Induced X-ray Emission (PIXE) were used to measure the elemental concentration of rock art fragment paintings. For pXRF the Amptek Silicon ...

  • Crossovers and phase transitions in Bose-Fermi mixtures 

    Kimene Kaya, Boniface Dimitri Christel (Stellenbosch : Stellenbosch University, 2014-04)
    ENGLISH ABSTRACT: We present a theoretical approach that allows for the description of trapped Bose-Fermi mixtures with a tunable interspecies interaction in the vicinity of a Feshbach resonance magnetic field.The many-body ...

  • Suboptimal LULU-estimators in measurements containing outliers 

    Astl, Stefan Ludwig (Stellenbosch : Stellenbosch University, 2013-12)
    ENGLISH ABSTRACT: Techniques for estimating a signal in the presence of noise which contains outliers are currently not well developed. In this thesis, we consider a constant signal superimposed by a family of noise ...

  • Thulium doped fibre lasers in continuous-wave and pulsed regimes 

    Coetzee, Riaan Stuart (Stellenbosch : Stellenbosch University, 2013-12)
    ENGLISH ABSTRACT: The following work focuses on the development and characterization of efficient, high-power, Thulium doped fibre lasers. Lasers emitting light around ~2 μm have generated a large amount of interest owing ...

  • Development of a magneto optical trap for Rubidium 87 

    Elnour, Huzifa Mohammed Ahamed Mohammed (Stellenbosch : Stellenbosch University, 2013-12)
    ENGLISH ABSTRACT: A Magneto Optical Trap (MOT) is a configuration formed by three orthogonal pairs of counterpropagating circularly polarized laser beams and a magnetic field gradient. A MOT is used to cool, capture and ...

  • Manipulation of short pulses 

    Okoye, Raphael (Stellenbosch : Stellenbosch University, 2013-12)
    ENGLISH ABSTRACT: An ultra-fast laser pulse can be described in the time or frequency domain. If the timebandwidth product of an ultra-fast pulse is not satisfied, then the pulse is stretched. Stretching can be described ...

  • Modelling of end-pumped Ho:YLF amplifiers 

    Collett, Oliver John Philip (Stellenbosch : Stellenbosch University, 2013-03)
    This work is a thesis regarding the energy scaling of end-pumped Ho:YLF amplifiers. The work includes: a brief review of laser physics and models, the development of a suitable three dimensional time resolved numerical ...

  • Development and application of tunable VUV laser sources 

    Nortje, Anton Christiaan (Stellenbosch : Stellenbosch University, 2013-03)
    ENGLISH ABSTRACT: A tunable narrow-bandwidth vacuum ultra violet laser source was developed and characterised. Two-photon resonant four-wave sum-frequency mixing of two pulsed dye laser beams in magnesium vapour was used ...

  • Geodesics and resonances of the Manko-Novikov spacetime 

    Geyer, Marisa (Stellenbosch : Stellenbosch University, 2013-03)
    ENGLISH ABSTRACT: In this thesis I study compact objects described by the Manko-Novikov spacetime. The Manko- Novikov spacetime is an exact solution to the Einstein Field Equations that allows objects to be black hole-like, ...

  • Spectral and temporal modulation and characterization of femtosecond ultra-short laser pulses 

    Mbanda Nsoungui, Gaelle Carine (Stellenbosch : Stellenbosch University, 2012-12)
    ENGLISH ABSTRACT: Ultra-short laser pulses are useful in materials processing like melting and cutting metals, and medical applications such as surgery and many other fields. In this study, we characterize and control ...

  • Terahertz (THz) spectroscopy 

    Numan, Nagla Numan Ali (Stellenbosch : Stellenbosch University, 2012-12)
    ENGLISH ABSTRACT: Terahertz radiation is currently used in security, information and communication technology (ICT), and biomedical sciences among others. The usability of terahertz (THz) radiation, in many of its ...

  • A quantum hall effect without landau levels in a quasi one dimensional system 

    Brand, Janetta Debora (Stellenbosch : Stellenbosch University, 2012-12)
    ENGLISH ABSTRACT: The experimental observation of the quantum Hall effect in a two-dimensional electron gas posed an intriguing question to theorists: Why is the quantization of conductance so precise, given the imperfections ...

  • Theoretical investigation of dielectrophoresis and electrophoresis as techniques for silver deflections 

    Mokgalapa, Naphtali Malesela (Stellenbosch : Stellenbosch University, 2012-12)
    ENGLISH ABSTRACT: The primary circuit components of very high temperature reactors (VHTRs) experience various unwanted fission products such as Kr, Xe, I, Cs, Sr, and Ag. These particle are generated during normal ...

  • Scattering in soliton models and crossing symmetry 

    Abdelhady, A. M. H. H. (Stellenbosch : Stellenbosch University, 2012-12)
    ENGLISH ABSTRACT: Crossing symmetry relates scattering and annihilation processes to each other. Its derivation is straightforward in perturbative approaches to quantum field theory: it merely reflects the exchange of ...

  • Polymer networks at surfaces 

    Vandoolaeghe, Wendy Leigh (Stellenbosch : Stellenbosch University, 2003-03)
    ENGLISH ABSTRACT: In this thesis the formation and properties of a polymer gel on and at a surface are investigated. The gel under investigation is defined as a three-dimensional network of macromolecules that form ...

  • Flow equations for hamiltonians from continuous unitary transformations 

    Bartlett, Bruce (Stellenbosch : Stellenbosch University, 2003-03)
    ENGLISH ABSTRACT: This thesis presents an overview of the flow equations recently introduced by Wegner. The little known mathematical framework is established in the initial chapter and used as a background for the entire ...

  • Development and optimisation of a solid-state pulsed power supply for a CO₂ TEA laser 

    Stehmann, Timo (Stellenbosch : Stellenbosch University, 2003-12)
    ENGLISH ABSTRACT: With technological advances in solid-state switches the modernization of conventional pulsed power supplies utilizing thyratrons has become possible. A novel pulsed power supply is designed where two ...

  • Self-organised criticality and seismicity 

    Boonzaaier, Leandro (Stellenbosch : Stellenbosch University, 2002-12)
    ENGLISH ABSTRACT: In this thesis we give an overview of self-organised criticality and its application to studying seismicity. We recall some of the basic models and techniques for studying self-organised critical systems. ...

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