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Radiation Protection Dosimetry Advance Access originally published online on April 27, 2006
Radiation Protection Dosimetry 2006 119(1-4):402-407; doi:10.1093/rpd/nci579
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© The Author 2006. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Thermoluminescence glow curves and optical stimulated luminescence of undoped {alpha}-Al2O3 crystals

C. X. Zhang1,*, Q. Tang1, L. B. Lin2 and D. L. Luo1

1 Department of physics, Zhongshan University, Guangzhou 510275, China
2 Radiation and Technology Laboratory, Sichuan University, Chengdu 610064, China

* Corresponding author: stszcx{at}zsu.edu.cn

The characteristics of thermoluminescence (TL) and optical stimulated luminescence (OSL) in undoped {alpha}-Al2O3 single crystals were studied. The TL glow curves of the crystal samples irradiated at various dose levels were measured by RisØ TL/OSL-DA-15B/C reader with U-340 or 7-59 filters at different heating rates. The glow peaks measured with U-340 at ~210°C of the undoped {alpha}-Al2O3 can be well fitted by first-order kinetic equation whereas the glow peaks measured with 7-59 filters are a composite of two first-order glow peaks. It indicates that the TL glow curves are dependent upon the filter used in the reader that is related to the emission spectra of luminescence materials. The OSL were also measured and fitted by two exponential functions to get the luminescence intensities. The TL and OSL dose responses of the undoped {alpha}-Al2O3 crystal were obtained in the dose range of 0.12–248 Gy and fitted by the composite action dose–response function to get nonlinear characteristic parameters. The TL and OSL dose responses are linear–sublinear.


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