Studies of thermoluminescence kinetic parameters of polymer pencil lead graphite under photon exposures

Mayeen Uddin Khandaker; Siti Nurasiah Mat Nawi; David Andrew Bradley; Siok Ee Lam; Siti Fairus Abdul Sani; Abdelmoneim Sulieman

doi:10.1016/j.apradiso.2021.109757

Studies of thermoluminescence kinetic parameters of polymer pencil lead graphite under photon exposures

Appl Radiat Isot. 2021 Aug:174:109757. doi: 10.1016/j.apradiso.2021.109757. Epub 2021 May 5.

Authors

Mayeen Uddin Khandaker¹, Siti Nurasiah Mat Nawi², David Andrew Bradley³, Siok Ee Lam², Siti Fairus Abdul Sani⁴, Abdelmoneim Sulieman⁵

Affiliations

¹ Centre for Applied Physics and Radiation Technologies, School of Engineering and Technology, Sunway University, 47500, Bandar Sunway, Selangor, Malaysia. Electronic address: mu_khandaker@yahoo.com.
² Centre for Applied Physics and Radiation Technologies, School of Engineering and Technology, Sunway University, 47500, Bandar Sunway, Selangor, Malaysia.
³ Centre for Applied Physics and Radiation Technologies, School of Engineering and Technology, Sunway University, 47500, Bandar Sunway, Selangor, Malaysia; Department of Physics, University of Surrey, Guildford, GU2 7XH, UK.
⁴ Department of Physics, University of Malaya, 50603, Kuala Lumpur, Malaysia.
⁵ Department of Radiology and Medical Imaging, College of Applied Medical Sciences, Prince Sattam Bin Abdulaziz University, P.O. Box 422, Alkharj, 11942, Saudi Arabia.

PMID: 33990033
DOI: 10.1016/j.apradiso.2021.109757

Abstract

This study analysed thermoluminescence (TL) glow curves of the polymer pencil lead graphite (PPLG) due to its potential applications in radiation dosimetry. The TL glow curves provide information on the physical parameters of the defects participating in luminescence process. The glow curves for different diameters PPLG samples were obtained with varying temperature from 50 to 300 °C, at a fixed heating rate of 10 °Cs^-1. A number of methods (initial rise, peak shape and curve fitting) were used to fit the TL glow peaks of the PPLG samples obtained under photon dose of 200 Gy. From the fitted TL signals, the trap parameters such as the order of kinetics, the activation energy, the frequency factor, etc. for the individual peaks were numerically determined. The lifetimes of TL process were calculated assuming the first-order kinetics. The results are compared among the different methods adopted in this study. Implications about the possible results in glow curve deconvolution are discussed.

Keywords: Activation energy; Kinetic parameters; Thermoluminescence; Three-point analysis method.