This study explored the thermoluminescence (TL) properties of various quartz types (amethyst, citrine, rock crystal, and rose quartz) when exposed to gamma irradiation, assessing their potential for dosimetric applications. Key aspects such as heating rate, glow curves, dose-response behavior, linearity index, sensitivity, and fading characteristics were analyzed for each quartz type. The results revealed significant differences in TL performance among the quartz samples, with each type exhibiting distinct characteristics under gamma irradiation. Amethyst displayed the most reliable TL behavior, with strong linearity and stable dose-response relationships, making it the most suitable candidate for radiation dosimetry. These findings contribute valuable insights into the selection of optimal quartz materials for radiation measurement, enhancing the precision and reliability of TL-based dosimetric techniques.
This study investigates the luminescence properties of calcite within coral skeletons collected from Pulau Redang, Malaysia, focusing on the effects of gamma irradiation. Using Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDX), X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Raman Spectroscopy, and luminescence measurements, we examined structural and compositional changes in corals subjected to varying doses of gamma radiation. Present results indicate significant lattice disorder and structural breakdown at higher radiation doses, evidenced by increased porosity and altered elemental composition. Despite these changes, specific luminescent properties persisted, suggesting a degree of adaptability in the coral calcite. Thermoluminescence (TL) and photoluminescence (PL) analyses revealed that gamma irradiation created new electron traps, maintaining luminescence despite structural disruptions. The study highlights potential risks to coral structural integrity due to radiation while also revealing an inherent resilience in luminescent properties. These findings provide valuable insights into the effects of environmental stressors on coral calcite, informing conservation strategies aimed at preserving coral reefs under changing conditions.