热电离质谱(TIMS)铀系法测定中的难点与对策  

Problems and Solutions in Measuring U and Th of Uranium Series Dating Technique by Thermal Ionization Mass Spectrometry

作　　者：何学贤[1] 刘敦一[1] 彭子成[2] 刘卫国[3] 

机构地区：[1]中国地质科学院地质研究所,北京100037 [2]中国科学技术大学地球和空间系,合肥230026 [3]中国科学院黄士和第四纪开放实验室,西安710054

出　　处：《质谱学报》2001年第2期17-22,共6页Journal of Chinese Mass Spectrometry Society

摘　　要：根据MAT 2 62质谱计的性能和U、Th同位素特征 ,本文探讨了热电离质谱铀系法测定中所遇到的难点 ,提出相应的对策 ,指导设计MAT 2According to the ability of MAT 262 mass spectrometer and the characteristics of U and Th isotopes,the article studies the problems in measuring U and Th of uranium series dating technique,e.g.huge differences in U and Th natural abundance,fractionation effects,big peak trailer and external U and Th from spikes,and proposes suitable solutions by devising formulae in experiments on MAT 262 spectrometer.

关 键 词：热电离质谱 铀系法 年代测定 年代学 

分 类 号：P597[天文地球—地球化学]