Browsing Doctoral Degrees (Physics) by Title

Analyzing power and cross section distributions of the 12C (p,pα)8Be cluster knockout reaction at an incident energy of 100 MeV

Mabiala, Justin (Stellenbosch : University of Stellenbosch, 2010-03)

ENGLISH ABSTRACT: The (p, pα) reaction on 12C was investigated experimentally using polarized incident protons of 100 MeV. Coincident data, which were obtained at ten quasifree angle pairs for proton angles ranging from ...

Application of the relativistic random-phase and distorted wave impulse approximations to quasielastic proton-nucleus scattering

Van Niekerk, David Douglas (Stellenbosch : University of Stellenbosch, 2010-12)

ENGLISH ABSTRACT: In this dissertation a fully relativistic model for polarized inclusive quasielastic proton-nucleus scattering is developed. Using a standard relativistic impulse approximation (RIA) treatment of quasielastic ...

Aspects of femtosecond pulse shape transfer via difference frequency mixing

Botha, Gerda Nicolene (Stellenbosch : Stellenbosch University, 2015-12)

ENGLISH ABSTRACT: We investigate the generation of shaped femtosecond pulses in the infrared spectral regime via a nonlinear process called di erence frequency mixing. First we develop a detailed model of the process, ...

Characterisation of heavy mineral sands and soils by radiometry and its use in mineral benefication and agriculture

De Villiers, Dawid (Stellenbosch : University of Stellenbosch, 2011-03)

ENGLISH ABSTRACT: Radioactivity is well known and well understood, but its usefulness in industrial applications to optimise processes or increase economic viability is not yet fully utilised by many industries. This ...

Charge carrier effects in free standing Si membranes investigated by linear and second harmonic optical techniques

Ndebeka, Wilfrid Innocent (Stellenbosch : Stellenbosch University, 2016-12)

ENGLISH ABSTRACT : Silicon (Si) based materials have been of technological importance throughout the years and today silicon remains a leading material in microelectronics industries. The silicon/silicon dioxide (Si/SiO2) ...

Charge dynamics in hybrid and organic-inorganic light harvesting thin films followed with femtosecond transient absorption spectroscopy

Minda, Iulia (Stellenbosch : Stellenbosch University, 2017-12)

ENGLISH ABSTRACT : In order to bridge the gap between traditional sources of electricity and the increasing global demand for it, as a society we must move towards renewable sources of energy such as solar radiation. ...

A cluster study of the nuclei 212Po and 218Rn

Ibrahim, Taofiq Toyin (Stellenbosch : University of Stellenbosch, 2009-12)

ENGLISH ABSTRACT: A binary cluster model is used to investigate the properties of the ground state band of 212Po, modelled as a 208Pb-alpha core-cluster system. The results obtained using a microscopic corecluster potential ...

Combinatorics and dynamics in polymer knots

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 ...

Confined counterions surrounding a Macroion : a field theoretic approach

Boonzaaier, Leandro (Stellenbosch : Stellenbosch University, 2011-12)

ENGLISH ABSTRACT: Several experiments [1, 2, 3, 4] have shown that e ective attractive interactions exist between con ned like-charged macromolecules. Theoretical approaches have not reached consensus as to precisely ...

Construction of a spectroscopic terahertz time-domain ellipsometer

Smith, Shane Raymond (Stellenbosch : Stellenbosch University., 2020-04)

ENGLISH ABSTRACT: Please refer to full text for abstract.

Control of CO2 vibrational dynamics via shaped-pulse coherent anti-Stokes Raman spectroscopy

Attie, Hendriks (Stellenbosch : Stellenbosch University, 2017-03)

ENGLISH ABSTRACT : In this work we investigate the coherent control of carbon dioxide (CO2) vibrational dynamics using Coherent anti-Stokes Raman Scattering (CARS). During CARS, vibrational modes are excited via stimulated ...

Coulomb excitation of the 2+ state in 14C and the quadrupole deformation of states in 194Pt

Brits, Christiaan Petrus (Stellenbosch : Stellenbosch University, 2019-12)

ENGLISH ABSTRACT: The safe Coulomb excitation experiment of 14C and 194Pt which took place at Florida State University took advantage of the unique beam capabilities, the availability of highefficiency large volume ...

Cross section measurement of light ions using (p,xp) and (p,xn) reactions

Kenfack Jiotsa, Doris Carole (Stellenbosch : Stellenbosch University, 2020-12)

ENGLISH ABSTRACT: The production cross section of light neutron-rich nuclei obtained from a proton induced reaction using light stable nuclei was extracted. The relevancy of such study, away from the valley of stability ...

Design, construction and characterisation of a low-level radioactivity counting system based on gamma-ray spectrometry with LaBr3:Ce scintillator detectors

Bashir, Munirat (Stellenbosch : Stellenbosch University., 2020-04)

ENGLISH ABSTRACT: The activity concentrations in naturally occurring radioactive material (NORM) samples are conventionally measured using a gamma-ray spectrometer with a single detector (mostly HPGe or NaI:Tl) enclosed ...