测定古砖年代的光释光和热释光方法的比较研究  

A comparative study between OSL and TL techniques for the dating of ancient Chinese bricks

作　　者：梁宝鎏[1] 唐强[1,2] 李德卉[1] 张纯祥[3] 

机构地区：[1]香港城市大学物理及材料科学系 [2]中山大学物理系广州510275 [3]中山大学物理系

出　　处：《核技术》2004年第6期464-468,共5页Nuclear Techniques

基　　金：香港城市大学研究基金(7001104;9010007);国家自然科学基金(10275100);高等学校博士学科点专项科研基金(20020558015)资助

摘　　要：采用单片再生剂量光释光法对分布在不同年代(年龄介于180—1600a)的中国古砖样品的等效剂量进行了测定;;在测量过程中插入固定的检测剂量来校正样品对光释光的灵敏度变化。同时我们也采用细颗粒常规高温热释光法对砖样的等效剂量进行了测定。这两种方法对照的结果能较好地吻合。得到的等效剂量之比(De(OSL)/De(TL))介于0.96—1.21之间;;平均值为(1.08±0.07)。通过等效剂量和已知年代计算出年剂量为5.07—6.85;;与实测的年剂量值相比差别不大。因此;;单片再生剂量光释光法用于鉴定古砖样品是一种快速有效的方法。The single-aliquot regenerative-dose (SAR) protocol to the optically stimulated luminescence (OSL) was applied to measure the paleodose of ancient Chinese bricks with an age range from 180 to 1600 years. In the protocol, sensitivity changes can be corrected by using OSL response to a fixed test dose during measurement. For comparative study between OSL and TL, thermoluminescence (TL) measurement procedures were also applied to determine the paleodose of the bricks. Both results of OSL and TL are in good agreement with, and the paleodose ratios (DeOSL/DeTL ) are between 0.96 and 1.21, with a mean value of 1.08±0.07. The annual dose of the bricks, estimated by the paleodoses and the known ages, ranges from 5.07 to 6.85 mGy/a, comparable with the measured annual dose values. Therefore, it is concluded that the SAR protocol is a rapid and effective OSL technique to authenticate Chinese bricks.

关 键 词：光释光 热释光 再生剂量法 古砖 

分 类 号：O483[理学—固体物理]