Citation

Alawiah, A. and Amin, Y. M. and Abdul Rashid, Hairul Azhar and Abdullah, W. S. Wan and Maah, M. J. and Bradley, D. A. (2017) An ultra-high dose of electron radiation response of Germanium Flat Fiber and TLD-100. Radiation Physics and Chemistry, 130. pp. 15-23. ISSN 0969-806X

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Abstract

The thermoluminescence (TL) response of Germanium Flat Fiber (GFF) and TLD-100 irradiated with 2.5 MeV electrons for the doses up to 1 MGy were studied and compared. The aim was to evaluate the TL supralinearity response at an ultra-high dose (UHD) range and to investigate the change in kinetic parameters of the glow peaks, as the doses increases up to 1 MGy. It is found that the critical dose limit (CDL) of GFF is 5 times higher as compared to TLD-100. CDL is determined by the dose at the maximum supralinearity, f(D)max. It is also found that annealing the TLD-100 and GFF with temperature more than 400 °C is required to reset it back to its original condition, following radiation doses up to 1 MGy. It is also noticed the strange behavior of Peak 4 (TLD-100), which tends to be invisible at the lower dose (<10 kGy) and starts to be appeared at the critical dose limit of 10 kGy. This result might be an important clue to understand the behavior of TLD-100 at extremely high dose range. For both samples, it is observed that the TL intensity is not saturated within the UHD range studied.

Item Type:	Article
Uncontrolled Keywords:	Critical dose limit, Ultra-high dose, TL kinetic model, Supralinearity, Glow curve, Glow peak
Subjects:	Q Science > QC Physics > QC350-467 Optics. Light
Divisions:	Faculty of Engineering (FOE)
Depositing User:	Ms Suzilawati Abu Samah
Date Deposited:	27 Jul 2020 09:38
Last Modified:	25 Aug 2021 08:39
URII:	http://shdl.mmu.edu.my/id/eprint/6978

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