• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Materials >Determination of Thermoluminescence Kinetic Parameters of La2O3 Doped with Dy3+ and Eu3+
【2h】

Determination of Thermoluminescence Kinetic Parameters of La2O3 Doped with Dy3+ and Eu3+

机译：Dy3 +和Eu3 +掺杂的La2O3的热致发光动力学参数的确定

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Thermoluminescence (TL) properties of La O : Dy , Li , and La O : Eu , Li , exposed to 5.12 Gy of beta radiation, and recorded at different heating rates 0.5, 1, 2, 3, 4, and 5 °C s (from Molefe et al., paper 2019), were analyzed and the trap parameters were determined in this study. These parameters include the order of kinetics , the activation energy (eV), the frequency factor (s ), or the pre-exponential factor ″ (s ), and the initial concentration of trapped electrons (cm ). A new non-linear curve fitting technique, based on the general order kinetic equation and the outcomes of Hoogenstraaten’s Method, was established and applied on the TL glow peaks of La O : Dy , Li . The fitting technique was evaluated by calculating the R-square and figure of merit (FOM) values. The results revealed that the FOM values are <1%, and the R-square values are >0.997, which demonstrates an excellent convergence between experimental and fitted curves. A modified technique based on the three-points analysis method was exploited to deconvolute complex TL glow curves of La O : Eu , Li , and in turn, to determine the trap parameters the method disclosed that each TL glow curve consists of four peaks. The trap parameters of the individual peaks were numerically determined. The fading, as a function of storage temperature and time, from the TL signals of the investigated materials was predicted and discussed based on the calculated trap parameters. The results support the value of the materials for employment in radiation dosimeter applications with a low fading fraction.
机译：La O：Dy，Li和La O：Eu，Li的热致发光（TL）特性，暴露于5.12 Gy的β辐射下，并在0.5、1、2、3、4和5°C s的不同加热速率下记录（根据Molefe等人的论文，2019年）进行了分析，并在此研究中确定了捕集阱参数。这些参数包括动力学顺序，活化能（eV），频率因数（s）或指数前因数''（s）以及被捕获电子的初始浓度（cm）。建立了一种基于总阶动力学方程和Hoogenstraaten方法结果的非线性曲线拟合新技术，并将其应用于La O：Dy，Li的TL辉光峰。通过计算R平方和品质因数（FOM）值来评估拟合技术。结果表明，FOM值<1％，R平方值> 0.997，这表明实验曲线与拟合曲线之间具有很好的收敛性。利用一种基于三点分析法的改进技术对La O：Eu，Li的复杂TL辉光曲线进行反卷积，进而确定陷阱参数，该方法公开了每个TL辉光曲线均由四个峰组成。数值确定了各个峰的阱参数。基于所计算的陷阱参数，对所研究材料的TL信号随存储温度和时间而变的情况进行了预测和讨论。结果证明了该材料在辐射剂量计应用中具有低褪色率的应用价值。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号