Browsing Masters Degrees (Physics) by Title

Now showing items 115-134 of 134

    • 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 ...

    • Study of fusion evaporation channels in the 18O + 18O reaction at 65 MeV 

      Khaleel, Esra Ahmed Mohammed Adam (Stellenbosch : Stellenbosch University, 2011-12)
      ENGLISH ABSTRACT: See full text for abstract

    • 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 ...

    • 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 ...

    • Superconductivity problems with multiple Ginzburg-Landau order parameters 

      Geyer, Jani (Stellenbosch : Stellenbosch University, 2011-12)
      ENGLISH ABSTRACT: Two problems in the field of materials-based condensed matter physics, specifically in the field of superconductivity, are studied theoretically. In both problems, where each is of current exper- imental ...

    • 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 ...

    • Surface enhanced Raman spectroscopy (SERS) of amino acids 

      Pfukwa, Ngaatendwe Buhle Cathrine (Stellenbosch : Stellenbosch University, 2016-03)
      ENGLISH ABSTRACT : Raman spectroscopy (RS) is an invaluable technique for sample identification. This method requires little sample preparation and is not completely non-invasive. The intensity of Raman scattered light can ...

    • 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 ...

    • Test of fast neutron detectors for spectroscopy with (3He,n) two proton stripping reactions 

      Elbasher, Mohamed Elbasher Ahmed (Stellenbosch : Stellenbosch University, 2012-03)
      ENGLISH ABSTRACT: Nine 100x100x600 mm3 plastic scintillators, formerly built for the neutron time of ight measurements at iThemba LABS, were refurbished. The position resolution of these detectors was determined using ...

    • 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 ...

    • 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 ...

    • 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 ...

    • Time domain pulse shaping using a genetic algorithm 

      Mori, Andrew (Stellenbosch : University of Stellenbosch, 2010-03)
      ENGLISH ABSTRACT: Through the use of complex Laser Pulse Shaping, numerous fundamental laser induced processes may be controlled as well as studied. This work serves as an introduction into Laser Pulse Shaping, with the ...

    • 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 ...

    • 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 ...

    • Transverse and longitudinal Bose-Einstein correlations in antiproton-proton reactions at centre-of-mass energy 630 GeV 

      October, Faith Joy (Stellenbosch : Stellenbosch University, 2002-03)
      ENGLISH ABSTRACT: We use Hanbury-Brown Twiss interferometry to determine Bose-Einstein correlations in the transverse and longitudinal directions. By using these two directions, we are able to determine the shape of the ...

    • Ultrafast electron diffraction on the charge density wave compound 4Hb-TaSe2 

      Boshoff, Ilana (Stellenbosch : Stellenbosch University, 2012-03)
      ENGLISH ABSTRACT: Ultrafast electron diffraction is a powerful method to study atomic movement in crystals on sub-picosecond timescales. This thesis consists of three parts. In part one the ultrafast electron diffraction ...

    • 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 ...

    • Ultrashort optical pulse characterization 

      Bosman, Gurthwin Wendell (Stellenbosch : University of Stellenbosch, 2008-03)
      Various autocorrelation techniques are employed to characterize ultrashort laser pulses in both the temporal and spectral domain. These techniques are; interference autocorrelation (IAC), modified spectrum autointerfer ...

    • 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 ...