Comparison of the TL fading characteristics of Ge-doped optical fibres and LiF dosimeters

Noramaliza M Noor; Nasiha A Shukor; M Hussein; A Nisbet; D A Bradley

doi:10.1016/j.apradiso.2011.11.026

Comparison of the TL fading characteristics of Ge-doped optical fibres and LiF dosimeters

Appl Radiat Isot. 2012 Jul;70(7):1384-7. doi: 10.1016/j.apradiso.2011.11.026. Epub 2011 Nov 25.

Authors

Noramaliza M Noor¹, Nasiha A Shukor, M Hussein, A Nisbet, D A Bradley

Affiliation

¹ Centre for Nuclear and Radiation Physics, Department of Physics, University of Surrey, and Department of Medical Physics, St. Luke's Cancer Centre, Royal Surrey County Hospital NHS Foundation Trust, Guildford GU2 7XH, UK. n.mohdnoor@surrey.ac.uk

PMID: 22134025
DOI: 10.1016/j.apradiso.2011.11.026

Abstract

Fading is important in choosing appropriate thermoluminescence (TL) materials for particular applications. Comparison is made herein of changes due to fading in the TL yield of Ge-doped fibres and lithium fluoride (LiF) dosimeters, for varying temperature and dose. The fading is independent of dose for all investigated dosimeters while the loss in TL yield reduces for lower storage temperatures. At room temperature and for 133 days of storage, a maximum signal loss of 5% has been observed for both forms of LiF dosimeter, while 9 and 50 μm core diameter Ge-doped fibres produced a loss of 11% and 8%, respectively.