The analysis of thermoluminescent glow peaks of CaF2: Dy (TLD-200) after β-irradiation

A. Necmeddin Yazici, Reuven Chen, Semra Solak, Zehra Yegingil

Research output: Contribution to journalArticlepeer-review

Abstract

Variable dose (VD), Tm-Tstop, initial rise (IR), variable heating rate (VHR), peak shape (PS) and computerized glow curve deconvolution (CGCD) methods are used to determine the number of peaks, the order of kinetics (b), the activation energy (Ea) and attempt-to-escape frequency (s) associated with the glow peaks in CaF2 : Dy (TLD-200) after β-irradiation between the dose level 0.1 and 110 Gy. The Tm-Tstop procedure indicates that the glow curve of this crystal consists of at least nine glow peaks. The dose variation experiment indicates that seven of them, namely peaks 1-6 and 8, are of first-order kinetics and peaks 7 and 9 are of general-order kinetics. However, the Tm-Tstop procedure and the CGCD method have indicated that peak 6 has general-order kinetics too. The activation energy found with the IR, VHR, PS and CGCD methods for peak 4 yield very close values. For all other peaks, there is no agreement between the results of all the applied methods. This work also indicates that the post-irradiation annealing and the heating rate have pronounced effects on the evaluated kinetic parameters of all glow peaks.

Original languageEnglish
Pages (from-to)2526-2535
Number of pages10
JournalJournal of Physics D: Applied Physics
Volume35
Issue number20
DOIs
StatePublished - 21 Oct 2002

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