Recent Submissions

  • Single molecule diffusion in polymeric systems 

    Sibanda, Charmaine (Stellenbosch : Stellenbosch University, 2019-04)
    ENGLISH ABSTRACT : The dynamics of thin polymeric systems were studied in this research work using the diffusion of single fluorescent molecules observed by single molecule fluorescence microscopy. A wide field single ...
  • Spectroscopy of atomic zinc inside a heat pipe: Towards resonance ionisation 

    Hattingh, Brandon Dane (Stellenbosch : Stellenbosch University, 2019-04)
    ENGLISH ABSTRACT : Zinc (Zn) reserves in South Africa are not being used to full potential. Separating Zn into its different stable isotopes drastically increases its value, as well as usefulness in certain areas such ...
  • Thermalisation of a two-species condensate coupled to a bosonic bath 

    Louw, Jan Cillié (Stellenbosch : Stellenbosch University, 2019-04)
    ENGLISH ABSTRACT : Motivated by recent experiments, we study the time evolution of a two-species Bose-Einstein condensate which is coupled to a bosonic bath. For the particular condensate, unconventional thermodynamics ...
  • Resonance ionization spectroscopy with time of flight mass spectrometry 

    Waso, Frederick John (Stellenbosch : Stellenbosch University, 2019-04)
    ENGLISH ABSTRACT : Resonance ionization using laser light is one of the most useful techniques for isolating radioactive isotopes and producing radioactive ion beams at accelerator facilities around the world. The aim of ...
  • Towards atomic physics using spatially structured light 

    Webster, Jason (Stellenbosch : Stellenbosch University, 2018-12)
    ENGLISH ABSTRACT : Structured light has seen many applications in the fields of telecommunications, optical microscopy, and quantum information processing, however, few works exist that explore the interactions of ...
  • Optical tweezers for advanced microscopy 

    Erasmus, Anneke (Stellenbosch : Stellenbosch University, 2018-03)
    ENGLISH SUMMARY: The integration of lasers into microscopy has enabled new areas of research and expanded existing ones. Not only can one now image samples to resolutions and contrast unheard of before lasers became ...
  • Point spread function engineering for fluorescence microscopy 

    Holinirina Dina Miora, Ratsimandresy (Stellenbosch : Stellenbosch University, 2018-03)
    ENGLISH SUMMARY: A tool for biological imaging is developed within this work. It consists of engineering the point spread function (PSF) of a fluorescent molecule or a nanoparticle emitter by modulating the phase of the ...
  • Bayesian parameter estimation for discrete data spectra 

    Wang, Li (Stellenbosch : Stellenbosch University, 2017-12)
    ENGLISH ABSTRACT : Discrete spectra are ubiquitous in physics; for example nuclear physics, laser physics and experimental high energy physics measure integer counts in the form of particles in dependence of angle, ...
  • Noninvasive measurement of dynamic correlations in spin systems 

    Uhrich, Philipp Johann (Stellenbosch : Stellenbosch University, 2017-12)
    ENGLISH ABSTRACT : Dynamic correlations hψ| O1(t1)O2(t2)|ψi of quantum observables are useful quantities for the study of quantum dynamics. Attempts at measuring these correlations are however complicated, due to the ...
  • Studying the structural phase transition of organic Cu(DCNQI)2 with ultrafast electron diffraction 

    Payne, Nancy (Stellenbosch : Stellenbosch University, 2017-12)
    ENGLISH ABSTRACT : Organic molecular solids combine the richness of molecular and solid state physics. The structure and properties of organic solids can be modified to a great extent—for example, by utilising isotope ...
  • Computing the Arnold Tongue in the Zipoy-Voorhees Space-time 

    Sherif, Abbas Mohamed (Stellenbosch : Stellenbosch University, 2017-03)
    ENGLISH ABSTRACT : In this thesis I study the integrability of the geodesic equations of the ZipoyVoorhees metric. The Zipoy-Voorhees spacetime is a one parameter family of Stationary Axisymmetric Vacuum spacetimes (SAV’s) ...
  • Methods for the radiological characterisation of the FiR 1 TRIGA research reactor decommissioning waste 

    Ackermann, Tarryn (Stellenbosch : Stellenbosch University, 2017-03)
    ENGLISH ABSTRACT : Every nuclear reactor will eventually reach the end of its life time. With more than 60 new power reactors currently under construction, the need for understanding the safe decommissioning of a nuclear ...
  • A near infrared femtosecond laser source for observation of charge transfer processes in semiconductors 

    Ahmed, Essraa Taha (Stellenbosch : Stellenbosch University, 2017-03)
    ENGLISH ABSTRACT : Near infrared femtosecond laser pulses were generated in the spectral range 900 - 2400 nm using the idler of a noncollinear optical parametric amplifier (NOPA). The amplitude and phase of four exemplary ...
  • Supercontinuum pulse characterisation and compression 

    Viljoen, Ruan (Stellenbosch : Stellenbosch University, 2017-03)
    AFRIKAANSE OPSOMMING : In hierdie projek word die infrastruktuur van 'n hoë-resolusie nie-lineêre mikroskoop ontwikkel. Spesifiek word daar gekyk na generering van breëband lig deur middel van 'n fotoniese-kristalvesel ...
  • Fluorescence and self-absorption free excitation spectroscopy of carbon monoxide isotopomers in the vacuum ultraviolet 

    De Bruyn, Andre (Stellenbosch : Stellenbosch University, 2017-03)
    ENGLISH ABSTRACT : Carbon Monoxide (CO) is the most abundant heteronuclear diatomic molecule in the universe and has been of great interest in the fields of astrophysics and astronomy. CO is additionally, a prototype ...
  • Quantum corrections to the kink-antikink potential 

    Lee, Zander (Stellenbosch : Stellenbosch University, 2017-03)
    ENGLISH ABSTRACT : In quantum field theory vacuum polarization effects may drastically alter the classical properties of non-perturbative field configurations. This is especially the case when comparing the vacuum ...
  • Proton pencil beam kernels as extracted from Geant4 Monte Carlo simulations 

    Chisapi, Maluba Vernon J. (Stellenbosch : Stellenbosch University, 2016-12)
    ENGLISH ABSTRACT : The contribution of primary protons, secondary protons, heavy recoil ions, and other secondary particles to the total energy deposited in water by a proton pencil beam (in the therapeutic energy regime) ...
  • Ultrafast photochromism in metal-organic complexes 

    Von Stein, Xavier (Stellenbosch : Stellenbosch University, 2016-12)
    ENGLISH ABSTRACT : Dithizone (H2Dz), an analytical reagent typically used in colourimetric analysis, reacts with various transition metals to form metal dithizonate complexes. These complexes display strong absorption ...
  • Search for the scissors resonance in 182Ta 

    Brits, Christiaan Petrus (Stellenbosch : Stellenbosch University, 2016-12)
    ENGLISH ABSTRACT :Relatively small changes to the overall shape of the photon strength function such as the scissors or pygmy resonances can have a significant impact on reaction rates. Reaction rates are important for ...
  • Cave front tracking experiment 

    Green, Mark (Stellenbosch : Stellenbosch University, 2016-12)
    ENGLISH ABSTRACT : Seismic tomography, a procedure to trace seismic wave velocity variation, has been used for more than 100 years to “see through rock”. Initially the recording of seismic waves from natural sources ...

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