Department of Physics

SUNScholar Research Repository

Department of Physics

Recent Submissions

  • Vermeulen, Christiaan (Stellenbosch : Stellenbosch University, 2014-12)
    ENGLISH ABSTRACT: The facilities for radionuclide production at iThemba LABS have undergone a number of significant upgrades over the last decade in order to increase the production capacity and to diversify the ...
  • Dirk-Mathys, Spangenberg   Dudley, Angela   Neethling, Pieter H.   Rohwer, Erich G.   Forbes, Andrew (Optical Society of America, 2014-05)
    Spatial light modulators are ubiquitous tools for wavefront control and laser beam shaping but have traditionally been used with monochromatic sources due to the inherent wavelength dependence of the calibration process ...
  • Müller-Nedebock, Kristian (Stellenbosch : Stellenbosch University, 2013-10)
    Kristian Müller-Nedebock’s association with Stellenbosch began when his parents moved the family here from his place of birth, Eshowe, in KwaZulu-Natal. With predilections for libraries, Lego and Latin, his pursuit ...
  • Rohwer, Christian Matthias (Stellenbosch : Stellenbosch University, 2014-04)
    ENGLISH ABSTRACT: In this dissertation we address the conservation of topological states in polymer knots. Topological constraints are frequently included into theoretical descriptions of polymer systems through invariants ...
  • 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 ...
  • De Kock, Michiel Burger (Stellenbosch : Stellenbosch University, 2014-04)
    ENGLISH ABSTRACT: We investigate the procedure of assigning probabilities to logical statements. The simplest case is that of equilibrium statistical mechanics and its fundamental assumption of equally likely states. ...
  • 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 ...
  • 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 ...
  • Rohwer, Egmont Johann (Stellenbosch : Stellenbosch University, 2014-04)
    ENGLISH ABSTRACT: The initial charge transfer from dye molecules' excited states to the conduction band of a semiconductor, after absorption of visible light by the former, is critical to the performance of Dye sensitized ...
  • Swartz, Jacobus Andreas (Stellenbosch : Stellenbosch University, 2014-04)
    ENGLISH ABSTRACT: The study of α clustering is a well-established topic of research in nuclear physics. Recent experimental evidence has revealed the first 2+ excitation of the Hoyle state in 12C, which is known to have ...
  • 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 ...
  • Mira, Joele Paulus (Stellenbosch : Stellenbosch University, 2013-12)
    ENGLISH ABSTRACT: See full text for the abstract
  • 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 ...
  • Haupt, Kerstin Anna (Stellenbosch : Stellenbosch University, 2013-12)
    ENGLISH ABSTRACT: Low-dimensional materials are known to undergo phase transitions to differently or- dered states, when cooled to lower temperatures. These phases often show a periodic modulation of the charge density ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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, ...
  • Erasmus, Nicolas (Stellenbosch : Stellenbosch University, 2013-03)
    ENGLISH ABSTRACT: In this thesis the structural dynamics, upon photo-excitation, of the charge-densitywave (CDW) material 4Hb-TaSe2 is investigated on the time-scale of atomic motion and simultaneously on the spatial-scale ...

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