| 赵楠,杨瑞杰,王俊杰.热释光探测器的剂量学特性研究[J].中华放射医学与防护杂志,2015,35(9):696-699 |
| 热释光探测器的剂量学特性研究 |
| The dosimetric characteristics of thermoluminescent dosimeter |
| 投稿时间：2014-11-17 |
| DOI：10.3760/cma.j.issn.0254-5098.2015.09.014 |
| 中文关键词: 热释光探测器 重复性 剂量响应 剂量率效应 能量响应 |
| 英文关键词:Thermoluminescent dosimeter Repeatability Dose response Dose rate effect Energy response |
| 基金项目:国家自然科学基金(81372420) |
|
| 摘要点击次数: 3113 |
| 全文下载次数: 2644 |
| 中文摘要: |
| 目的 研究热释光探测器(TLD)的剂量学特性。方法 选取一致性为±3%的TLD 2000型热释光探测器350片。采用6 MV X射线和125I粒子分别照射,研究热释光探测器对6 MV X射线和125I粒子响应的重复性以及剂量率效应。采用137Cs(662 keV γ射线)、125I粒子、6 MV X射线分别照射热释光探测器,研究热释光探测器的剂量响应。采用125I粒子、137Cs和X射线(48、65、83、118、250 keV和6 MV)对热释光探测器照射相同剂量,研究热释光探测器的能量响应。结果 热释光探测器对于6 MV X射线和125I粒子响应重复性最大偏差分别为2.7%和4.0%,且均无剂量率效应。对于137Cs和125I粒子,热释光探测器的剂量响应均为线性。对于6 MV X射线,剂量线性响应范围为0.74~10 Gy,超过10 Gy热释光剂量响应呈非线性。能量响应按照137Cs进行归一,对于125I粒子,48、65、83、118、250 keV和6 MV能量X射线,能量响应分别为1.70、1.25、1.08、0.99、0.91、0.96和1.22。结论 TLD 2000型热释光探测器的重复性好,对于137Cs、125I粒子和6 MV X射线的剂量响应呈线性,且无剂量率效应,但存在能量响应。 |
| 英文摘要: |
| 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. |
| HTML 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|