The thermoluminescence glow curve and the deconvoluted glow peak characteristics of erbium doped silica fiber exposed to 70-130 kVp x-rays.

Autor: Alawiah A; Faculty of Engineering and Technology, Multimedia University, 75450 Malacca, Malaysia. Electronic address: alawiahofd@gmail.com., Bauk S; Physics Department, Universiti Sains Malaysia, 11800 Penang, Malaysia., Marashdeh MW; Department of Physics, College of Science, Al Imam Mohammad Bin Saud Islamic University, Riyadh 11623, Saudi Arabia., Nazura MZ; Faculty of Engineering and Technology, Multimedia University, 75450 Malacca, Malaysia., Abdul-Rashid HA; Fiber Optics Research Center, Faculty of Engineering, Multimedia University, 20100 Cyberjaya, Selangor, Malaysia., Yusoff Z; Fiber Optics Research Center, Faculty of Engineering, Multimedia University, 20100 Cyberjaya, Selangor, Malaysia., Gieszczyk W; Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, 31-342 Krakow, Poland., Noramaliza MN; Department of Imaging, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia., Adikan FR; Photonics Research Group, Department of Electrical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia., Mahdiraji GA; Photonics Research Group, Department of Electrical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia., Tamchek N; Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia., Muhd-Yassin SZ; Telekom Research & Development Sdn Bhd, Idea Tower, UPM-MTDC, Technology Incubation Center One, Lebuh Silikon, 43400 Serdang, Selangor, Malaysia., Mat-Sharif KA; Telekom Research & Development Sdn Bhd, Idea Tower, UPM-MTDC, Technology Incubation Center One, Lebuh Silikon, 43400 Serdang, Selangor, Malaysia., Zulkifli MI; Telekom Research & Development Sdn Bhd, Idea Tower, UPM-MTDC, Technology Incubation Center One, Lebuh Silikon, 43400 Serdang, Selangor, Malaysia., Omar N; Telekom Research & Development Sdn Bhd, Idea Tower, UPM-MTDC, Technology Incubation Center One, Lebuh Silikon, 43400 Serdang, Selangor, Malaysia., Wan Abdullah WS; Department of Non-Ionizing Radiation, Nuclear Malaysia Agency, 43000 Bangi, Selangor, Malaysia., Bradley DA; Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom; Department of Physics, University of Malaya, 50603 Kuala Lumpur, Malaysia.
Jazyk: angličtina
Zdroj: Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine [Appl Radiat Isot] 2015 Oct; Vol. 104, pp. 197-202. Date of Electronic Publication: 2015 Jul 11.
DOI: 10.1016/j.apradiso.2015.07.011
Abstrakt: In regard to thermoluminescence (TL) applied to dosimetry, in recent times a number of researchers have explored the role of optical fibers for radiation detection and measurement. Many of the studies have focused on the specific dopant concentration, the type of dopant and the fiber core diameter, all key dependencies in producing significant increase in the sensitivity of such fibers. At doses of less than 1 Gy none of these investigations have addressed the relationship between dose response and TL glow peak behavior of erbium (Er)-doped silica cylindrical fibers (CF). For x-rays obtained at accelerating potentials from 70 to 130 kVp, delivering doses of between 0.1 and 0.7 Gy, present study explores the issue of dose response, special attention being paid to determination of the kinetic parameters and dosimetric peak properties of Er-doped CF. The effect of dose response on the kinetic parameters of the glow peak has been compared against other fiber types, revealing previously misunderstood connections between kinetic parameters and radiation dose. Within the investigated dose range there was an absence of supralinearity of response of the Er-doped silica CF, instead sub-linear response being observed. Detailed examination of glow peak response and kinetic parameters has thus been shown to shed new light of the rarely acknowledged issue of the limitation of TL kinetic model and sub-linear dose response of Er-doped silica CF.
(Copyright © 2015 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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