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Radiation Protection Dosimetry Advance Access originally published online on May 22, 2006
Radiation Protection Dosimetry 2006 119(1-4):438-441; doi:10.1093/rpd/nci548
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© The Author 2006. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

A comprehensive comparative study of the predose effect for three quartz crystals of different origin

George Kitis1, Vasilis Pagonis2,*, Reuven Chen3 and George Polymeris1

1 Nuclear Physics Laboratory, Aristotle University of Thessaloniki, 54124-Thessaloniki, Greece
2 Department of Physics, McDaniel College, Westminster, MD 21157, USA
3 School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel-Aviv University, Tel-Aviv 69978, Israel

* Corresponding author: vpagonis{at}mcdaniel.edu

The study of the thermoluminiscence (TL) sensitivity of quartz due to heat and irradiation treatments is of importance in dating and retrospective dosimetry. A comprehensive comparative study of the predose effect was carried out for three types of quartz of different origin. Complete TL vs. dose and sensitivity S vs. predose curves were obtained for the dose range of 0.1 < D < 400 Gy. Additional complete sensitivity vs. predose curves were obtained for samples which underwent a combined predose irradiation and a subsequent heat treatment to 500°C. Although the TL vs. dose curves showed very different behaviours, the sensitivity vs. predose curves showed several common characteristics. The sensitivity vs. predose curves showed abrupt changes ~10 Gy. The sensitivity after a combined predose irradiation and heat treatment to 500°C showed a very gradual change in the whole dose range studied. These results are explained qualitatively by using the modified Zimmerman model for quartz.


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