Anomalous heating rate and kinetic analysis in the thermoluminescence of GdCa4O(BO3)3
Radiation Physics and Chemistry, cilt.232, 2025 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 232
- Basım Tarihi: 2025
- Doi Numarası: 10.1016/j.radphyschem.2025.112614
- Dergi Adı: Radiation Physics and Chemistry
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Pollution Abstracts, Civil Engineering Abstracts
- Anahtar Kelimeler: Anomalous heating rate, GdCa4O(BO3)3, Semi-localized transition (SLT) model, Thermoluminescence
- Çukurova Üniversitesi Adresli: Evet
Özet
This study investigates the thermoluminescence (TL) properties of GdCa4O(BO3)3 phosphors under beta irradiation, highlighting their potential for dosimetric applications. A prominent glow peak at 175 °C was observed, demonstrating consistent sensitivity under preheating conditions. TL glow peaks were studied using variable heating rate (VHR), Tm-Tstop, initial rise (IR), and computerized glow curve deconvolution (CGCD) methods. Eight distinct trap levels with activation energies ranging from 0.92 to 1.28 eV were identified, confirming the material's diverse trap-depth distribution. The dose-response behavior exhibited superlinear characteristics, with a minimum detectable dose (MDD) of 74.4 mGy, making it suitable for low-dose monitoring. Observed anomalous heating rate effects were explained using the semi-localized transition (SLT) model. These findings position GdCa4O(BO3)3 as a promising candidate for luminescence-based technologies.