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Optically stimulated Al2O3:C luminescence dosimeters for teletherapy: Hp(10) performance evaluation

Hashim, S. and Musa, Y. and Ghoshal, S. K. and Ahmad, N. and Hashim, I. H. and Yusop, M. and Bradley, D. and Kadir, A. (2018) Optically stimulated Al2O3:C luminescence dosimeters for teletherapy: Hp(10) performance evaluation. Applied Radiation and Isotopes, 135 . pp. 7-11. ISSN 0969-8043

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Official URL: http://dx.doi.org/10.1016/j.apradiso.2018.01.010


The performance of optically stimulated luminescence dosimeters (OSLDs, Al2O3:C) was evaluated in terms of the operational quantity of HP(10) in Co-60 external beam teletherapy unit. The reproducibility, signal depletion, and dose linearity of each dosimeter was investigated. For ten repeated readouts, each dosimeter exposed to 50 mSv was found to be reproducible below 1.9 ± 3% from the mean value, indicating good reader stability. Meanwhile, an average signal reduction of 0.5% per readout was found. The dose response revealed a good linearity within the dose range of 5–50 mSv having nearly perfect regression line with R2 equals 0.9992. The accuracy of the measured doses were evaluated in terms of operational quantity HP(10), wherein the trumpet curve method was used respecting the 1990 International Commission on Radiological Protection (ICRP) standard. The accuracy of the overall measurements from all dosimeters was discerned to be within the trumpet curve and devoid of outlier. It is established that the achieved OSL Al2O3:C dosimeters are greatly reliable for equivalent dose assessment.

Item Type:Article
Uncontrolled Keywords:Linearity, Reproducibility
Subjects:Q Science > QC Physics
ID Code:86660
Deposited By: Widya Wahid
Deposited On:30 Sep 2020 17:01
Last Modified:30 Sep 2020 17:01

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