Thermoluminescence glow curves and deconvoluted glow peaks of Ge doped flat fibers at ultra-high doses of electron radiation

The behavior of Ge doped silica, SiO2 flat fibers (FF) irradiated with 2.5MeV electron radiation at ultra-high dose (UHD) range, up to 1MGy, has been investigated. The analyzed glow curves measured by the usage of the WinREMS software revealed that peak height and glow curve maximum temperature are...

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Bibliographic Details
Published in:Radiation physics and chemistry (Oxford, England : 1993) England : 1993), 2015-08, Vol.113, p.53-58
Main Authors: Alawiah, A., Bauk, S., Marashdeh, M.W., Ng, K.S., Abdul-Rashid, H.A., Yusoff, Z., Gieszczyk, W., Noramaliza, M.N., Mahdiraji, G.A., Tamchek, N., Muhd-Yassin, S.Z., Mat-Sharif, K.A., Zulkifli, M.I., Maah, M.J., Che Omar, S.S., Bradley, D.A.
Format: Article
Language:English
Subjects:
Computer programs
Electron radiation
Fibers
Flat fiber
Flats
Germanium
Glow curves
Silicon dioxide
Software
Supralinearity
Thermoluminescence
Ultra-high dose
WinGCF
WinREMS
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Summary:The behavior of Ge doped silica, SiO2 flat fibers (FF) irradiated with 2.5MeV electron radiation at ultra-high dose (UHD) range, up to 1MGy, has been investigated. The analyzed glow curves measured by the usage of the WinREMS software revealed that peak height and glow curve maximum temperature are highly dependent on the dose. The shape of the glow curves is constant with increasing dose. The supralinearity of all glow peaks increases to its f(D)max, which occurs around 50kGy. No saturation occurs at f(D)max and further increases in dose, up to 1MGy, exhibits a significant decrease in f(D). The glow peaks 2 (230°C) and 4 (290°C), deconvoluted by the usage of WinGCF software, are the first-order kinetic peaks and can be used as the main dosimetric peaks for high-dose measurements between 1 and 50kGy in an industrial environment. •The supralinearity of FF was highly dependent on UHD.•f(D)max occurs around 50kGy for 6wt% Ge doped FF.•Peak 2 (230°C) and peak 4 (290°C) are the first-order kinetic peaks.•Sensitivity of FF decreases for doses >50kGy.
ISSN:0969-806X
1879-0895
DOI:10.1016/j.radphyschem.2015.04.030