Thermoluminescence characteristics of flat optical fiber in radiation dosimetry under different electron irradiation conditions

A., Alawiah and A. M., Intan and H. A., Abdul-Rashid and Z., Yusoff and M. R., Mokhtar and S., Bauk and W. S., Wan Abdullah and K. A., Mat Sharif and G. A., Mahdiraji and F. R., Mahamd Adikan and N., Tamchek and N. M., Noor and D. A., Bradley (2013) Thermoluminescence characteristics of flat optical fiber in radiation dosimetry under different electron irradiation conditions. Micro-structured and Specialty Optical Fibres II, 8775.

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Abstract

Thermoluminescence (TL) flat optical fibers (FF) have been proposed as radiation sensor in medical dosimetry for both diagnostic and radiotherapy applications. A flat optical fiber with nominal dimensions of (3.226 × 3.417 × 0.980) mm3 contains pure silica SiO2 was selected for this research. The FF was annealed at 400°C for 1 h before irradiated. Kinetic parameters and dosimetric glow curve of TL response were studied in FF with respect to electron irradiation of 6 MeV, 15 MeV and 21 MeV using linear accelerator (LINAC) in the dose range of 2.0-10.0 Gy. The TL response was read using a TLD reader Harshaw Model 3500. The Time-Temperature-Profile (TTP) of the reader used includes; initial preheat temperature of 80°C, maximum readout temperature is 400°C and the heating rate of 30°Cs-1. The proposed FF shows excellent linear radiation response behavior within the clinical relevant dose range for all of these energies, good reproducibility, independence of radiation energy, independence of dose rate and exhibits a very low thermal fading. From these results, the proposed FF can be used as radiation dosimeter and favorably compares with the widely used of LiF:MgTi dosimeter in medical radiotherapy application.

Item Type: Article
Subjects: T Technology > T Technology (General)
Divisions: Faculty of Engineering and Technology (FET)
Depositing User: Ms Nurul Iqtiani Ahmad
Date Deposited: 27 Feb 2014 08:44
Last Modified: 03 Mar 2014 06:58
URI: http://shdl.mmu.edu.my/id/eprint/5325

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