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Investigation of silica-based TL media for diagnostic x-ray dosimetry

Amjad., Alyahyawi, and Zahariman, Siti Rozaila and Ahmad Shaharuddin, Siti Shafiqah and Sabtu, Siti Norbaini and A, Alsubaie and A, Alanazi and Eman, Daar and S.F, Abdul Sani and D.A, Bradley (2017) Investigation of silica-based TL media for diagnostic x-ray dosimetry. Radiation Physics and Chemistry, 140. pp. 78-82. ISSN 0969-806X (In Press)

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We focus on the development of Ge-doped silica thermoluminescent dosimeters with sensitivity superior to that of the LiF (Mg,Ti) phosphors popularly used in x-ray diagnostic imaging dosimetry, typically in the form of the product TLD-100. Of interest are Ge-doped silica telecommunication fibres (SMF) and tailor-made doped photonic crystal fibres (PCFc), the latter Ge-doped or also co-doped with boron. The PCFs are formed of capillaries that at high temperatures and under vacuum are made to collapse inwards (PCFc), the internal walls fusing and generating strain-related defects. To-date, the fabricated PCFc-Ge-B, PCFc-Ge and (SMF) have been observed to provide TL yields which weight-for-weight are some 15, 10 and 2 × that of TLD-100. In present study we test the linearity of TL yield for x-ray doses from 0.1- to 10 mGy, use being made of an x-ray tube operated at 80 kVp, a value typically selected in chest radiography. For a dose of 10 mGy, a study of energy dependence has been conducted using x-ray tube potentials of 80 kVp 100 kVp, and 120 kVp, with inherent filtration 0.9 mm Al measured at 75 kVp, and total filtration of 2.8 mm Al at 80 kVp.

Item Type: Article (Journal)
Additional Information: 7747/55557
Uncontrolled Keywords: Chest imaging; Dosimetry; Ge-doped silica; Thermoluminesence photonic crystal fibre; TLD
Subjects: Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Science > Department of Physics
Depositing User: DR Siti Shafiqah Binti Ahmad Shaharuddin
Date Deposited: 13 Feb 2017 17:32
Last Modified: 22 Mar 2018 10:34
URI: http://irep.iium.edu.my/id/eprint/55557

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