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Radiation Protection Dosimetry Advance Access originally published online on July 29, 2008
Radiation Protection Dosimetry 2008 131(4):406-413; doi:10.1093/rpd/ncn197
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© The Author 2008. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Investigation of the ionisation density dependence of the glow curve characteristics of LIF:MG,TI (TLD-100)

Y. S. Horowitz1,*, A. Horowitz2, L. Oster3, S. Marino4, H. Datz5 and M. Margaliot5

1 Physics Department, Ben Gurion University of the Negev, Beersheva, Israel
2 Crystal Growth Division, Nuclear Research Center, Beersheva, Israel
3 Physics Unit, Sami Shamoon College of Engineering, Beersheva, Israel
4 Radiological Research Accelerator Facility, Columbia University, NY, USA
5 Radiation Safety Division, Soreq Nuclear Research Center, Yavne, Israel

* Corresponding author: yigal{at}bgu.ac.il

Received June 4, 2008, amended July 3, 2008, accepted July 4, 2008

The dependence of the shape of the glow curve of LiF:Mg,Ti (TLD-100) on ionisation density was investigated using irradiation with 90Sr/90Y beta rays, 60 and 250 kVp X rays, various heavy-charged particles and 0.2 and 14 MeV neutrons. Special attention is focused on the properties of high-temperature thermoluminescence; specifically, the behaviour of the high-temperature ratio (HTR) of Peaks 7 and 8 as a function of batch and annealing protocol. The correlation of Peaks 7 and 8 with average linear-energy-transfer (LET) is also investigated. The HTR of Peak 7 is found to be independent of LET for values of LET approximately >30 keV µm–1. The behaviour of the HTR of Peak 8 with LET is observed to be erratic, which suggests that applications using the HTR should separate the contributions of Peaks 7 and 8 using computerised glow curve deconvolution. The behaviour of the HTR following neutron irradiation is complex and not fully understood. The shape of composite Peak 5 is observed to be broader following high ionisation alpha particle irradiation, suggesting that the combined use of the HTR and the shape of Peak 5 could lead to improved ionisation density discrimination for particles of high LET.


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Y. S. Horowitz
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Radiat Prot Dosimetry, February 21, 2009; (2009) ncp018v1.
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