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    Radiation-induced thermoluminescence in Ca5(PO4)3OH powder from eggshell: Trapping parameter assessment
    (Pergamon-Elsevier Science Ltd, 2024) Souadi, G.; Bulcar, K.; Yucel, A.; Oglakci, M.; Sezer, S.; Madkhali, O.; Can, N.
    This study examines the thermoluminescence (TL) properties exhibited by hydroxyapatite (HAp) samples. The HAp samples were characterized using X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses. XRD results confirm that Hap corresponds to a hexagonal structure with a space group of P63/m. The study emphasizes the critical role of appropriate band-pass filters in TL measurements and explores the dose-dependent behavior of TL glow peaks. Examining the impact of varying heating rates (HR) on TL peak intensities revealed a positive correlation between HR and TL maximum peak temperatures, accompanied by a decrease in TL intensities. Notably, no thermal quenching effect was observed in HAp samples. The activation energy values were 0.51, 1.12, and 1.57 eV for Hoogenstraaten's method and 0.55, 1.19, and 1.65 eV for the Booth-BohunPorfianovitch method, demonstrating their consistency and robustness. Additionally, Tm-Tstop analysis was employed to identify distinct trap levels and calculate their respective activation energies. This study establishes a solid foundation for characterizing TL properties in HAp samples, shedding light on their potential applications in various fields. The findings provide valuable insights for the design and development of efficient catalysts for diverse applications.