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Radiation Protection Dosimetry Advance Access originally published online on May 18, 2006
Radiation Protection Dosimetry 2006 119(1-4):191-196; doi:10.1093/rpd/nci557
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© The Author 2006. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Comparative study of LiF:Mg,Cu,Na,Si and Li2B4O7:Cu,Ag,P TL detectors

S. Miljanic1,*, M. Ranogajec-Komor1, Z. Knezevic1, M. Stuhec2 and M. Prokic3

1 Ruder Boskovic Institute, Bijenicka 54, 10000 Zagreb, Croatia
2 Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
3 "VINCA" Institute of Nuclear Sciences, 11001 Belgrade, Serbia and Montenegro

* Corresponding author: saveta{at}rudjer.irb.hr

Recently, two new types of ‘tissue equivalent’ thermoluminescent detectors (TLDs) have aroused attention: LiF:Mg,Cu,Na,Si and Li2B4O7:Cu,Ag,P. In this work the characteristics of both detectors were compared with the characteristics of the well-known type LiF:Mg,Ti detector, TLD-100. The following properties were investigated: the glow curve structures, relative sensitivity, batch homogeneity and uniformity, detection threshold, reproducibility of the response, linearity in the wide dose range and fading. Also, the energy dependence for medium and low energy X rays was determined in the range of mean energies between 33 and 116 keV. The results confirmed ‘tissue equivalency’ of both new types in the investigated range of photon energies. LiF:Mg,Cu,Na,Si detector has very high sensitivity (~75 times higher than that of TLD-100) and is convenient for use in a very low range of doses. Li2B4O7:Cu,Ag,P detector shows some improvements in comparison with the previously prepared types of lithium borate. The most important is the five times higher sensitivity than that of TLD-100. This detector is also very promising, especially in medical dosimetry.


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