title: The thermoluminescence glow curve and the deconvoluted glow peak characteristics of erbium doped silica fiber exposed to 70-130 kVp x-rays.
abstract: 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.
authors.affiliation: Faculty of Engineering and Technology, Multimedia University, 75450 Malacca, Malaysia. Electronic address: alawiahofd@gmail.com.
authors.forename: A
authors.initials: A
authors.lastname: Alawiah
authors.affiliation: Physics Department, Universiti Sains Malaysia, 11800 Penang, Malaysia.
authors.forename: S
authors.initials: S
authors.lastname: Bauk
authors.affiliation: Department of Physics, College of Science, Al Imam Mohammad Bin Saud Islamic University, Riyadh 11623, Saudi Arabia.
authors.forename: M W
authors.initials: MW
authors.lastname: Marashdeh
authors.affiliation: Faculty of Engineering and Technology, Multimedia University, 75450 Malacca, Malaysia.
authors.forename: M Z N
authors.initials: MZ
authors.lastname: Nazura
authors.affiliation: Fiber Optics Research Center, Faculty of Engineering, Multimedia University, 20100 Cyberjaya, Selangor, Malaysia.
authors.forename: H A
authors.initials: HA
authors.lastname: Abdul-Rashid
authors.affiliation: Fiber Optics Research Center, Faculty of Engineering, Multimedia University, 20100 Cyberjaya, Selangor, Malaysia.
authors.forename: Z
authors.initials: Z
authors.lastname: Yusoff
authors.affiliation: Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, 31-342 Krakow, Poland.
authors.forename: W
authors.initials: W
authors.lastname: Gieszczyk
authors.affiliation: Department of Imaging, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
authors.forename: M N
authors.initials: MN
authors.lastname: Noramaliza
authors.affiliation: Photonics Research Group, Department of Electrical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors.forename: F R Mahamd
authors.initials: FR
authors.lastname: Adikan
authors.affiliation: Photonics Research Group, Department of Electrical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors.forename: G A
authors.initials: GA
authors.lastname: Mahdiraji
authors.affiliation: Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
authors.forename: N
authors.initials: N
authors.lastname: Tamchek
authors.affiliation: Telekom Research & Development Sdn Bhd, Idea Tower, UPM-MTDC, Technology Incubation Center One, Lebuh Silikon, 43400 Serdang, Selangor, Malaysia.
authors.forename: S Z
authors.initials: SZ
authors.lastname: Muhd-Yassin
authors.affiliation: Telekom Research & Development Sdn Bhd, Idea Tower, UPM-MTDC, Technology Incubation Center One, Lebuh Silikon, 43400 Serdang, Selangor, Malaysia.
authors.forename: K A
authors.initials: KA
authors.lastname: Mat-Sharif
authors.affiliation: Telekom Research & Development Sdn Bhd, Idea Tower, UPM-MTDC, Technology Incubation Center One, Lebuh Silikon, 43400 Serdang, Selangor, Malaysia.
authors.forename: M I
authors.initials: MI
authors.lastname: Zulkifli
authors.affiliation: Telekom Research & Development Sdn Bhd, Idea Tower, UPM-MTDC, Technology Incubation Center One, Lebuh Silikon, 43400 Serdang, Selangor, Malaysia.
authors.forename: N
authors.initials: N
authors.lastname: Omar
authors.affiliation: Department of Non-Ionizing Radiation, Nuclear Malaysia Agency, 43000 Bangi, Selangor, Malaysia.
authors.forename: W S
authors.initials: WS
authors.lastname: Wan Abdullah
authors.affiliation: Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom; Department of Physics, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors.forename: D A
authors.initials: DA
authors.lastname: Bradley
mesh_terms: D004307:Dose-Response Relationship, Radiation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D004871:Erbium / Q000737:chemistry* / Q000528:radiation effects; D008422:Materials Testing; D055100:Optical Fibers; D011829:Radiation Dosage; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012822:Silicon Dioxide / Q000737:chemistry* / Q000528:radiation effects; D013819:Thermoluminescent Dosimetry / Q000295:instrumentation* / Q000379:methods*; D014965:X-Rays
chemical_list: D012822:Silicon Dioxide; D004871:Erbium
keywords: Glow curve; Glow peak; Kinetic parameters; Sub-linearity; TL kinetic model