The thermoluminescence characteristics and the glow curves of Thulium doped silica fiber exposed to 10MV photon and 21MeV electron radiation

The thermoluminescence (TL) glow curves and kinetics parameters of Thulium (Tm) doped silica cylindrical fibers (CF) are presented. A linear accelerator (LINAC) was used to deliver high-energy radiation of 21MeV electrons and 10MV photons. The CFs were irradiated in the dose range of 0.2–10Gy. The e...

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Bibliographic Details
Published in:	Applied radiation and isotopes Vol. 98; pp. 80 - 86
Main Authors:	Alawiah, A., Alina, M.S., Bauk, S., Abdul-Rashid, H.A., Gieszczyk, W., Noramaliza, M.N., Mahdiraji, G.A., Tamchek, N., Zulkifli, M.I., Bradley, D.A., Marashdeh, M.W.
Format:	Journal Article
Language:	English
Published:	England Elsevier Ltd 01-04-2015
Subjects:	Glow curve Glow peak Kinetic parameters Sub-linearity TL kinetic model Sub-linearity TL kinetic model Kinetic parameters Glow curve Glow peak
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Summary:	The thermoluminescence (TL) glow curves and kinetics parameters of Thulium (Tm) doped silica cylindrical fibers (CF) are presented. A linear accelerator (LINAC) was used to deliver high-energy radiation of 21MeV electrons and 10MV photons. The CFs were irradiated in the dose range of 0.2–10Gy. The experimental glow curve data was reconstructed by using WinREMS. The WinGCF software was used for the kinetic parameters evaluation. The TL sensitivity of Tm-doped silica CF is about 2 times higher as compared to pure silica CF. Tm-doped silica CF seems to be more sensitive to 21MeV electrons than to 10MV photons. Surprisingly, no supralinearity was displayed and a sub-linear response of Tm-doped silica CF was observed within the analyzed dose range for both 21MeV electrons and 10MV photons. The Tm-doped silica CF glow curve consists of 5 individual glow peaks. The Ea of peak 4 and peak 5 was highly dependent on dose when irradiated with photons. We also noticed that the electron radiation (21MeV) caused a shift of glow peak by 7–13°C to the higher temperature region compared with photons radiation (10MV). Our Tm-doped fibers seem to give high TL response after 21MeV electrons, which gives around 2 times higher peak integral as compared with 10MV photon radiation. We concluded that peak 4 is the first-order kinetic peak and can be used as the main dosimetric peak of Tm-doped silica CF. •A sub-linear response of Tm doped silica CF was measured at dose range of 0.2–10Gy.•The TL sensitivity of Tm doped silica CF is 2 times higher as compared to pure silica CF.•Tm-doped silica CF glow curve consists of 5 individual glow peaks.•The glow peak area and peak height of Tm-doped silica CF are highly dependent on dose.•The kinetics parameters are highly dependent on dose.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0969-8043 1872-9800
DOI:	10.1016/j.apradiso.2015.01.016