OSL测年中CGC法求De均值的计算方法之比较分析

摘要

光释光测年中等效剂量是计算样品埋藏年龄的一个重要参数,一般通过求多个实验测量值的均值得出.标准生长曲线法是求等效剂量的一种常用且有效的方法,分析讨论了此法计算的等效剂量存在小幅度的系统性的偏大及其原因,提出了改进的方法;展望了CGC法求De均值更优的估计—极大似然估计.%Equivalent dose is one of the important parameters in calculating the burial age of the sample on the OSL dating. Generally it' s taken more than one experimental values to seek the mean as the sample's equivalent dose. Common growth curve method (CGC) is valid and common to solve the equivalent dose, this study discovered that there is a small systematic deviation in nowadays' CGC and discussed its reason,and the improved methods were proposed. A prospect of more superior method to solve the equivalent dose,CGC method-maximum likehood estimation,were given.