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Radiation Protection Dosimetry 101:65-68 (2002)
© 2002 Oxford University Press

Design of a Finger Ring Extremity Dosemeter Based on OSL Readout of alpha-Al2O3:C

J. S. Durham, X. Zhang, F. Payne and M. S. Akselrod

A finger-ring dosemeter and reader has been designed that uses OSL readout of alpha-Al2O3:C (aluminium oxide). The use of aluminium oxide is important because it allows the sensitive element of the dosemeter to be a very thin layer that reduces the beta and gamma energy dependence to acceptable levels without compromising the required sensitivity for dose measurement. OSL readout allows the ring dosemeter to be interrogated with minimal disassembly. The ring dosemeter consists of three components: aluminium oxide powder for measurement of dose, an aluminium substrate that gives structure to the ring, and a aluminised Mylar cover to prevent the aluminium oxide from exposure to light. The thickness of the three components have been optimised for beta response using the Monte Carlo computer code FLUKA. A reader was also designed and developed that allows the dosemeter to be read after removing the Mylar. Future efforts are discussed.


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