| Zhao Nan,Yang Ruijie,Wang Junjie.The dosimetric characteristics of thermoluminescent dosimeter[J].Chinese Journal of Radiological Medicine and Protection,2015,35(9):696-699 |
| The dosimetric characteristics of thermoluminescent dosimeter |
| Received:November 17, 2014 |
| DOI：10.3760/cma.j.issn.0254-5098.2015.09.014 |
| KeyWords:Thermoluminescent dosimeter Repeatability Dose response Dose rate effect Energy response |
| FundProject:国家自然科学基金(81372420) |
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| Abstract:: |
| Objective To study the dosimetric characteristics of thermoluminescent dosimeter (TLD). Methods A total of 350 pieces of TLD 2000 type TLDs having the same sensitivity within±3.0% were selected. The TLDs were irradiated to study the repeatability and dosage effect of TLDs by using 6 MV X-rays and 125I seeds. In order to study the dose response, the TLDs were irradiated at different dosages by using 137Cs (662 keV γ-rays), 125I seeds and 6 MV X-rays. In order to study the energy response, the TLDs were exposed to the same dose, from 125I seeds, 137Cs and X-rays (48, 65, 83, 118, 250 keV and 6 MV). Results The maximum deviations of the repeatability were 2.7% and 4.0% for 6 MV X-rays and 125I seeds, respectively, and there was no effect of dose rate observed. The dose response of TLDs to 137Cs and 125I seeds were linear. For 6 MV X-rays, the linear response was within the range of 0.74-10 Gy and non-linear range was beyond 10 Gy. The energy response to 125I seeds, 48, 65, 83, 118, 250 keV and 6 MV X-rays, relative to the energy response of 137Cs, were 1.70, 1.25, 1.08, 0.99, 0.91, 0.96 and 1.22, respectively. Conclusions TLD 2000 has a good repeatability and linear dose response for 137Cs, 125I seeds and 6 MV X-rays with no dose rate effects, but the dose response is energy dependent. |
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