Maghrabi M, Al-Jundi J, Arafah D-E
Physics Department, Hashemite University, P.O. Box 150459, Zarqa 13115, Jordan.
Radiat Prot Dosimetry. 2008;130(3):291-9. doi: 10.1093/rpd/ncn061. Epub 2008 Mar 12.
Mixed-order (MO) and general-order (GO) kinetics expressions are applied to experimental glow curves of CaSO4:Ce, LiNaSO4:Eu, BaF2:Ce and SrF2:Er. The purpose is to compare the activation energies derived from the two models to investigate the correlation between the order of kinetics, b, and the parameter alpha of the MO model for real systems and to explore the validity of the correlation between b and alpha derived from the analysis of synthetic glow peaks or experimentally isolated single peak for complex glow curves. The two alternative routes resulted in clean fits with very close values of the sum of squared residuals. The general conclusions are: (1) the activation energies derived from the MO model are slightly higher than the ones derived from the GO model, but the difference appears to be insignificant, (2) the correlation between b and alpha is not smooth and the scatter in the b values for a given alpha is within the theoretically expected spread in the b value and (3) the MO expression is capable of evaluating the shape parameters as accurately as the GO expression with the advantage that it has a physical basis contrary to the purely empirical GO model.
混合级（MO）和广义级（GO）动力学表达式被应用于硫酸钙：铈、硫酸锂钠：铕、氟化钡：铈和氟化锶：铒的实验辉光曲线。目的是比较从这两种模型得出的活化能，以研究动力学级数b与实际系统中MO模型的参数α之间的相关性，并探讨从合成辉光峰分析或复杂辉光曲线的实验分离单峰得出的b与α之间相关性的有效性。这两种替代方法都得到了拟合良好的结果，残差平方和的值非常接近。总体结论如下：（1）从MO模型得出的活化能略高于从GO模型得出的活化能，但差异似乎不显著；（2）b与α之间的相关性不光滑，对于给定的α，b值的分散在理论预期的b值范围内；（3）MO表达式能够与GO表达式一样准确地评估形状参数，其优点是它有物理基础，这与纯粹经验性的GO模型不同。
