Uncertainty Analysis of Hp(10)meas/Hp(10)del Ratio for TLD–100H at Energy 24–1250 keV
DOI:
https://doi.org/10.11113/jt.v62.1899Keywords:
Energy dependence, Hp(10) uncertainty, ICRP trumpet graph, TLD–100HAbstract
The Hp(10) of an ideal TLD is independent of photon energy. This is to say that at any photon energy, the ratio R of the measured dose Hp(10)meas to the delivered dose Hp(10)del is always 1. In practice however the Hp(10) is dependent on the energy and R is not equal to 1. For this reason, ICRP has set the lower limit LL and upper limit UL for R as 0.55≤R≤1.63 for detection limit of 0.1 mSv and Hp(10)del=1 mSv. As R is the quantity arises from the measurement processes, the existence of uncertainty of R, i.e. ΔR is inevitable. In the boundary cases, such as when R is slightly lower than LL or slightly larger than UL, ΔR would serve a useful quantity in decision making either to accept or to reject the value of R. The purpose of the present work is to estimate ΔR for the TLD–100H for photon energy of 24–1250 keV. The estimation of ΔR is based on the error propagation method. For the eleven photon energies, this work obtained (a) R in the range of 0.77 to 1.16, (b) ΔR in the range of ± 0.02 to ± 0.04. The values of R were satisfactory as they complied the ICRP limit. The determined ΔR is considered very small as it is in the order of 3% in comparison of R.References
ICRU. 1985. ICRU Report 39: Determination of Dose Equivalents Resulting from External Radiation Sources. Bethesda: ICRU.
ICRU. 1992. ICRU Report 47: Measurement of Dose Equivalents from External Photon and Electron Radiations. Bethesda: ICRU.
ICRU. 1997. ICRU Report 57: Conversion Coefficients for use in Radiological Protection against External Radiation. Bethesda: ICRU.
ICRP. 1991. ICRP Publication 60: Recommendations of the International Commission on Radiological Protection. Oxford: ICRP.
IAEA. 1999. IAEA Safety Standard: Assesment of Occupational Exposure Due to External Sources of Radiation. Vienna: IAEA.
Gregori, B. N., Papadopulos, S. B., Saravi, M., and Kunst, J. J. 2000. Argentine Republic Intercomparation Programme for Personal Dosimetry. Autoridad Regulatoria Nuclear. 172: 1–6.
Priharti, W. and Samat, S. B. 2012. Evaluation of Harshaw TLD-100H Hp(10) and Hp(0.07) responses at energy 32-662 keV. 3rd Jogja International Conference on Physics 2012 Proceedings: 143–146.
Priharti, W., Samat, S. B., Othman, M. A. R., Mukhtar, A. M., Kadir, A. B. A., Kadni, T., and Dolah, M. T. 2012. Hp(10) Evaluation for TL LiF: Mg, Cu, dan P detector (TLD-100 H). 12th Postgraduate Colloquium Proceedings. 91–93.
Samat, S. B. and Evans, C. J. 1992. Statistics and Nuclear Counting – Theory, Problems and Solutions. Serdang: Universiti Pertanian Malaysia Press.
Izewska, J. and Rajan, G. 2003. Review of Radiation Oncology Physics: A Handbook for Teachers and Students. Vienna: IAEA.
Luo, L. Z. and Rotunda, J. E. 2006. Performance of Harshaw TLD-100H two-element Dosemeter. Radiation Protection Dosimetry 120(1–4): 324–330.
Downloads
Published
Issue
Section
License
Copyright of articles that appear in Jurnal Teknologi belongs exclusively to Penerbit Universiti Teknologi Malaysia (Penerbit UTM Press). This copyright covers the rights to reproduce the article, including reprints, electronic reproductions, or any other reproductions of similar nature.
