Department of Physics and Astronomy: Recent submissions
Now showing items 21-40 of 238
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Investigation of stains existing on fossil samples from the sterkfonfein archeaologica sites
(University of the Western Cape, 2006)It is known that fossilized bone samples excavated from the Sterkfontein archaeological sites have prominent brown stains on their surfaces. Their existence has been postulated by researchers from Transvaal museum to be ... -
Search for tetrahedral bands in yb isotopes
(University of the Western Cape, 2007)Calculations by Dudek et al. predict shell gaps for tetrahedrally shaped nuclei at various proton and neutron numbers. 160Yb is expected to be a favourable nucleus, with tetrahedral bands predicted to lie 1 MeV above the ... -
Aluminium induced crystallization of hydrogenated amorphous silicon thin films
(University of the Western Cape, 2005)This study was carried out to crystallize hydrogenated amorphous silicon (a-Si:H) thin films using the aluminium induced crystallization (AIC) technique. This was done to investigate whether is there any lateral crystallization ... -
Synthesis of bimetallic immiscible alloy nanoparticles through green and gamma radiolysis approaches for environmental remediation applications
(University of the Western Cape, 2022)The synthesis of bimetallic immiscible alloy nanoparticles (NPs) using versatile routes, is a major concern since physio-chemical methods are not environmentally benign. Breaking down the immiscibility would generate NPs ... -
Synthesis of bimetallic immiscible alloy nanoparticles through green and gamma radiolysis approaches for environmental remediation applications
(University of the Western Cape, 2022)The synthesis of bimetallic immiscible alloy nanoparticles (NPs) using versatile routes, is a major concern since physio-chemical methods are not environmentally benign. Breaking down the immiscibility would generate NPs ... -
Linear polarization and lifetime measurement in ¹⁹⁴TL
(University of the Western Cape, 2006)High-spin states in¹⁹⁴TL were populated using the 181Ta1t8O, 5n) reaction at the beam energies of 91 and 93 MeV during two weekends of beam time. The 1^Tcoincidence data associated with this reaction were measured employing ... -
Supervised machine learning techniques for radio source classification
(University of the Western Cape, 2023)Classification is one of the most fundamental aspects of scientific investigation. Astronomers have thus developed several classification schemes to try and make sense of the evolving properties of planets, stars and ... -
Ion genaration, deflection and deposition in vacuum
(University of the Western Cape, 2010)In the PBMR it is known that at high temperatures (above 1250 'C) silver-110m is known to have been released from the TRISO particles and taken up by the helium coolant stream. The released silver-ll0m travels with the ... -
Radon exhalation studies for applications in low background environments.
(University of the Western Cape, 2022)Neutrinoless double beta decay (0 ) is a rare process that is yet to be observed. Observation of neutrinoless double beta decays would imply lepton number violation, and that the neutrino is its own antiparticle ... -
Radon exhalation studies for applications in low background environments.
(University of the Western Cape, 2023)Neutrinoless double beta decay (0νββ) is a rare process that is yet to be observed. Observation of neutrinoless double beta decays would imply lepton number violation, and that the neutrino is its own antiparticle (a Majorana ... -
E2/M1 mixing in the Jπ= 5/2+ to 3/2+ transition in 21Na and its relation to the 20Ne(p,y ) stellar reaction rate
(University of the Western Cape, 2022)In the above, M is the total mass of the molecular cloud, R is its radius, k is Boltzmann's constant, G is the gravitational constant, T is the cloud temperature, m is the mean molecular weight, and is the cloud molecular ... -
HI intensity mapping: Impact of primary beam effects
(University of the Western Cape, 2023)Neutral hydrogen (HI) intensity mapping surveys with upcoming and future radio telescopes such as the MeerKAT, a precursor to the Square Kilometre Array Observatory (SKAO) MID telescope, have great potential for constraining ... -
The interstellar medium scaling relations in cosmological simulations
(University of the Western Cape, 2022)This work presents the scaling relations for the redshift zero galaxies in the SIMBA1 cosmological hydrodynamic simulations. The aim is to test the degree to which the SIMBA simulations reproduce the physical properties ... -
Out of thermodynamic equilibrium reaction of zinc-molybdenum system monitored by real-time rutherford backscattering spectrometry
(University of the Western Cape, 2022)Solid phase reaction of bi-metallic thin films of zinc-molybdenum was thermally induced in order to investigate the diffusion kinetics of this bi-metallic system. The Zinc-Molybdenum bilayers were prepared by depositing ... -
Synthesis and characterization of ion implanted Pd/Ti/V/Pd/Ti based multilayer thin films using rutherford backscattering spectrometry (rbs) and elastic recoil detection analysis (erda) for hydrogen storage application
(University of the Western Cape, 2022)Hydrogen is regarded as an attractive, pollution-free energy carrier for future energy systems, supported by its efficient energy conversion. Still, the challenge is its storage and transportation. Hydrogen can either ... -
Study of low-lying proton unbound states in 24Al using the 24Mg(3He; t)24Al reaction.
(University of the Western Cape, 2022)This MSc project entails a study of astrophysically relevant states in 24Al, that are important for a better understanding of the 23Mg(p, )24Al nuclear reaction rate in classical novae. This is a crucial breakout reaction ... -
Anomaly Detection With Machine Learning In Astronomical Images
(University of the Western Cape, 2020)Observations that push the boundaries have historically fuelled scientific breakthroughs, and these observations frequently involve phenomena that were previously unseen and unidentified. Data sets have increased in size ... -
Isothermal and non-isothermal comparative study of zn-sn system using real-time rbs
(University of the Western Cape, 2021)Insight into the effects of isothermal and non-isothermal annealing on bi-metallic thin film is important for material synthesis and application in everyday use. The effects of isothermal annealing on bi-metallic thin ... -
Triaxiality and rotational bands in 133ce
(University of Western Cape, 2021)The neutron-de cient nuclei between the N = 50 and N = 82 shell closures provide rich information on the shape and structure of the nucleus. The isotones of 133Ce and 131Ba (N = 75) lie in this region of the nuclear ... -
Measurements and applications of radon in South African aquifer and river waters
(University of the Western Cape, 2009)In the natural decay series of 238Uan inert radioactive gas, 222Rn(radon) is formed in the decay of 226Ra.Because radon is relatively soluble in water, it migrates from places of its generation in rocks and soils to other ...