Maghrabi Mufeed, Al-Abdullah Tariq, Khattari Ziad
Physics Department, Hashemite University, P.O. Box 150459, Zarqa, 13115, Jordan.
J Fluoresc. 2018 Mar;28(2):597-603. doi: 10.1007/s10895-018-2222-7. Epub 2018 Mar 24.
The two heating rates method (originally developed for first-order glow peaks) was used for the first time to evaluate the activation energy (E) from glow peaks obeying mixed-order (MO) kinetics. The derived expression for E has an insignificant additional term (on the scale of a few meV) when compared with the first-order case. Hence, the original expression for E using the two heating rates method can be used with excellent accuracy in the case of MO glow peaks. In addition, we derived a simple analytical expression for the MO parameter. The present procedure has the advantage that the MO parameter can now be evaluated using analytical expression instead of using the graphical representation between the geometrical factor and the MO parameter as given by the existing peak shape methods. The applicability of the derived expressions for real samples was demonstrated for the glow curve of LiBO:Mn single crystal. The obtained parameters compare very well with those obtained by glow curve fitting and with the available published data.
首次使用双升温速率法（最初是为一阶辉光峰开发的）来评估符合混合阶（MO）动力学的辉光峰的活化能（E）。与一阶情况相比，推导得到的E表达式有一个可忽略不计的附加项（在几毫电子伏特的量级上）。因此，使用双升温速率法得到的E的原始表达式在MO辉光峰的情况下可以以极高的精度使用。此外，我们推导了一个关于MO参数的简单解析表达式。本方法的优点是现在可以使用解析表达式来评估MO参数，而不是像现有峰形方法那样使用几何因子和MO参数之间的图形表示。通过LiBO:Mn单晶的辉光曲线证明了所推导表达式对实际样品的适用性。获得的参数与通过辉光曲线拟合得到的参数以及现有的已发表数据非常吻合。
