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

Abstract

Variable dose (VD), T m-T stop , 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 (E a) and attempt-to-escape frequency (s) associated with the glow peaks in CaF 2 : Dy (TLD-200) after β-irradiation between the dose level 0.1 and 110 Gy. The T m-T stop 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 T m-T stop 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.

Determination of trapping parameters of dosimetric thermoluminescent glow peak of lithium triborate (LiB3O5) activated by aluminum

“…Previously published studies have shown that determination of activation energy and frequency factor mainly depends on the prior knowledge of kinetic order and the exact number of glow peaks in the glow curve [7][8][9]. Therefore, to form an opinion about the number of glow peaks and kinetic orders of all individual glow peaks in the glow curve structure of Al-doped LiB 3 O 5 , the additive dose method was firstly utilized in the current study.…”

The analysis of dosimetric thermoluminescent glow peak of CaF2:Mn after β-irradiation

“…Consequently, if the previous history of the material is unknown, it is advantageous to anneal the sample at 400°C for 30 min before putting it to any dosimetric use. Previously published studies have shown that the determination of E a and s mainly depends on the prior knowledge of kinetic order (b) and the exact number of glow peaks in the glow curve [19][20][21][22][23]. The investigations were based on the principle of different characteristic response patterns of glow peaks during irradiation.…”

The analysis of thermoluminescent glow peaks of copper doped ZnS thin films after β-irradiation

“…As mentioned in our previously published study [14], it is essential to find the kinetic order (b) and exact number of the glow peaks in each glow curve before the evaluating of trap depth (activation energy E a ) and frequency factor (s). Therefore, to find the b-values of each individual glow peak, the additive dose method was firstly used.…”