硫酸镁热释光发光曲线分析与陷阱参数

Thermoluminescence glow curve analysis and trapping parameters of magnesium sulphate

在室温至５００℃内测得ＭｇＳＯ４发光曲线的四个发光峰，用高斯函数对ＭｇＳＯ４发光曲线进行计算机拟合，定出峰温。用双升温速率法、多种升温速率法、初始升温法确定四个发光峰的激活能和频率因子，得到相近的结果。用一级和一般级动力学方程拟合发光曲线得到的激活能与升温法的结果比较，可以看出一般级动力学方程拟合得到的激活能与升温法测得的比较符合。

? The thermoluminescence (TL) from anhydrous magnesium sulphate irradiated with γ-rays was measured in pure nitrogen environment from room temperature up to 500℃ The TL glow curves were deconvoluted into four elementary peaks based on the Gaussian function The trapping parameters including activation energy, frequency factor and kinetics order were determined for each peak by two heating rates and variable heating rate methods The results show that the total glow curve can be well fitted with general order kinetics