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Radiation Protection Dosimetry Advance Access originally published online on May 30, 2006
Radiation Protection Dosimetry 2006 119(1-4):430-433; doi:10.1093/rpd/nci617
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© The Author 2006. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

A study on the behaviour of TLD-100 glow peaks at extreme ambient temperatures in Riyadh, Saudi Arabia

Abdalla N. Al-Haj* and Charlie S. Lagarde

Biomedical Physics Department, King Faisal Specialist Hospital & Research Center, MBC 03, P.O. Box 3354, Riyadh 11211, Kingdom of Saudi Arabia

* Corresponding author: abdal{at}kfshrc.edu.sa

In this study, the temperature-induced variations in the TLD-100 response and the modifications in its glow peaks are investigated in real environmental exposure conditions in Riyadh, Saudi Arabia, where ambient temperatures during summer reach >45°C and with relative humidity of <10%. Three groups of 12 TLD-100 cards in Harshaw type 8814 TLD cardholders were deployed as environmental dosemeters for a period of ~1 month for 12 consecutive months. One group was irradiated to 5 mGy 137Cs prior to deployment; another was irradiated to the same dose after deployment, while the last group was left unirradiated. Analysis of glow curves was done using commercially available glow curve deconvolution software (CGCD). Monthly variations in peak 3, 4 and 5 areas relative to the corresponding peak areas of a prompt glow curve are presented. Results of this study show good TL signal compensation between peaks 4 and 5 at all ambient temperatures encountered in this experiment, despite the observed individual variations experienced by each of these peaks. The sum of peak 4 and 5 areas is constant to within ~10%, for both pre- and post-irradiated dosemeters, during this 12-month cycle.


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