Low-dose photon irradiation response of GE and AI-doped SIO2 optical fibres

• Main Authors: Yaakob, Nor Haliza, Wagiran, Husin, Hossain, Md. Imam, Ramli, Ahmad Termizi, Bradley, David, Ali, Hasan
• Format: Article
• Published: Pergamon Press 2011
• Subjects: QC Physics
• Online Access: http://eprints.utm.my/id/eprint/45023/
• Institution: Universiti Teknologi Malaysia

We have investigated the thermoluminescent response and fading characteristics of germanium- and aluminium-doped SiO2 optical fibres. These optical fibres were placed in a solid phantom and irradiated using 6 and 10 MV photon beams at doses ranging from 0.02 to 0.24 Gy delivered using a linear accelerator. In fading studies, the TL measurements were continued up to 14 days post-irradation. We have investigated the linearity of TL response as a function of dose for Ge-, Al-doped optical fibre and TLD-100 obtained for 6 and 10 MV photon irradiations. We have concentrated on doses that represent a small fraction of that delivered to the tumour to establish sensitivity of measurement for peripheral exposures in external beam radiotherapy.