UNISA-Brazil Symposium

Session

Session 1

29 Oct 2026, 08:30

Conveners

Session 1

• Tobias Frederico (Instituto Tecnológico de Aeronáutica)

15. Phototransferred Thermoluminescence Properties of CaGa2O4:Pr3+ Prepared by Solution Combustion Method, Analytical methods and applications.

CLEMENT SICHANGI (UNISA)

29/10/2026, 08:30

Oral Presentation

Phototransferred thermoluminescence (PTTL) is a different type of thermoluminescence (TL) that offers the opportunity to investigate the interaction of charge traps by optical stimulation of charge. We hereby present blue light stimulated PTTL of CaGa2O4:Pr3+ synthesized by the solution combustion technique. The TL glow curve of CaGa2O4:Pr3+ exposed to 10 Gy and heated to 500 oC at 1oC/s shows...

28. Investigation of the thermoluminescence Properties of MgCO3.3H2O FOR Radiation Dosimetry

Zerfie Marshet Mehabaw (University of South Africa)

29/10/2026, 08:50

Oral Presentation

ABSTRACT
This study investigated the thermoluminescence (TL) performance of magnesium carbonate trihydrate (MgCO3.3H2O) synthesized via a green route using aqueous leaf extract of Eucalyptus globulus as a natural chelating and stabilizing agent. The synthesized material was structurally and morphologically confirmed to be phase-pure crystalline MgCO3.3H2O through X-ray diffraction (XRD),...

30. Stochastic Partitions and Cluster Statistics: Mathematical Methods Across High-Energy and Few-Body Physics

Yannick Mvondo-She (National Institute for Theoretical and Computational Sciences (NITheCS))

29/10/2026, 09:10

Oral Presentation

Many physical systems admit configurations that can be described in terms of clusters, fragments, or components of different sizes. This naturally leads to the mathematics of integer partitions and to probabilistic questions concerning how such partitions are distributed and evolve. In this talk, I will discuss a framework based on random partitions, permutation cycles, urn models, and...

26. Photocatalytic Hydrogen Evolution of Gallium Oxyhydroxide Synthesized from Varying Precursor (Gallium Nitrate) Concentrations

Tabitha Alango (University of South Africa)

29/10/2026, 09:30

Oral Presentation

Green hydrogen produced by photocatalytic water splitting is a promising clean energy source, but better photocatalysts are needed. Gallium oxyhydroxide (GaOOH) is widely used as a precursor for gallium oxide, yet its use for hydrogen evolution has not been reported. In this study, GaOOH was synthesised by a hydrothermal method using gallium nitrate concentrations from 0.1 to 0.5 M. X-ray...