title: The thermoluminescence characteristics and the glow curves of Thulium doped silica fiber exposed to 10MV photon and 21MeV electron radiation.
abstract: 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.
authors: Faculty of Engineering and Technology, Multimedia University, 75450 Malacca, Malaysia. Electronic address: alawiahofd@gmail.com.
authors: A
authors: A
authors: Alawiah
authors: Faculty of Engineering and Technology, Multimedia University, 75450 Malacca, Malaysia.
authors: M S
authors: MS
authors: Alina
authors: Physics Section, School of Distance Education, Universiti Sains Malaysia, 11800 Penang, Malaysia.
authors: S
authors: S
authors: Bauk
authors: Faculty of Engineering, Multimedia University, 20100 Cyberjaya, Selangor, Malaysia.
authors: H A
authors: HA
authors: Abdul-Rashid
authors: Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, 31-342 Krakow, Poland.
authors: W
authors: W
authors: Gieszczyk
authors: Department of Imaging, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
authors: M N
authors: MN
authors: Noramaliza
authors: Photonics Research Group, Department of Electrical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors: G A
authors: GA
authors: Mahdiraji
authors: Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
authors: N
authors: N
authors: Tamchek
authors: Telekom Research & Development Sdn. Bhd, Idea Tower, UPM-MTDC, Technology Incubation Center One, Lebuh Silikon, 43400 Serdang, Selangor, Malaysia.
authors: M I
authors: MI
authors: Zulkifli
authors: Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom; Department of Physics, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors: D A
authors: DA
authors: Bradley
authors: Department of Physics, College of Science, Al Imam Mohammad Bin Saud Islamic University, Riyadh 11623, Saudi Arabia.
authors: M W
authors: MW
authors: Marashdeh
keywords: Glow curve; Glow peak; Kinetic parameters; Sub-linearity; TL kinetic model