Akademik Veri Yönetim Sistemi
Materials Research Bulletin, cilt.192, 2025 (SCI-Expanded)
Sm³⁺-doped GdCa₄O(BO₃)₃ was synthesized and investigated for its thermoluminescence (TL) properties under beta irradiation. The kinetic parameters, including activation energy (Ea), frequency factor, and kinetic order, were determined using the Hoogenstraaten method, initial rise method, and computerized glow curve deconvolution (CGCD). The Tm-Tstop method indicated a combination of discrete and quasi-continuous trap distributions, with a stepwise increase in Ea suggesting thermally stable trapping centers. CGCD revealed nine distinct peaks with activation energies from 1.00 to 2.19 eV, confirming the presence of both shallow and deep traps. The frequency factor values varied, indicating different recombination kinetics across the peaks. Additionally, the material demonstrated high dosimetric stability, reproducibility, and a well-defined dose-response up to 500 Gy. High-dose deconvolution confirmed the formation of deep, thermally stable traps near 325 °C, while TL fading tests demonstrated strong signal retention at high temperatures. These results confirm the material's potential as a TL phosphor for radiation dosimetry.