稀土原子与离子的自然辐射寿命测量  

Natural radiative lifetime measurements of rare-earth atoms and ions

作　　者：蒋红玫[1] 杨博思[2] 李贺龙[1,2] 徐淮良[2,3] 

机构地区：[1]吉林大学物理学院,吉林长春130012 [2]吉林大学电子科学与工程学院集成光电子学国家重点联合实验室,吉林长春130012 [3]吉林大学原子与分子物理研究所,吉林长春130012

出　　处：《中国光学》2013年第5期660-669,共10页Chinese Optics

基　　金：国家自然科学基金资助项目(No.10978012);教育部留学回国人员科研启动基金资助项目;吉林大学基础科研业务研究经费"杰青"和"种子"基金资助项目

摘　　要：概述了当前自由原子和离子的激发态自然辐射寿命测量技术的进展。以LaⅠ和PrⅡ为例,系统介绍了几种稀土元素自由原子和离子激发态寿命测量技术并分析了它们的优缺点;以SmⅡ为例,详细介绍了激光烧蚀产生自由原子(离子)技术及结合激光诱导荧光时间分辨光谱技术进行激发态寿命测量的优缺点。最后,探讨了改进上述技术局限性的解决思路,以期进一步提高辐射寿命测量的精确度。Advances in the techniques available for natural radiative lifetime measurement of excited states of free atoms and ions are presented.The disadvantages and advantages of several often-used methods for radia-tive lifetime measurements of free atoms and ions of rare-earth elements are reviewed by taking La Ⅰ and PrⅡas examples.Then, the techniques of the laser ablation to produce free atoms and ions are introduced by taking SmⅡas an example, and the time-resolved laser induced fluorescence （LIF） spectroscopy for the radi-ative lifetime measurements is discussed in detail .The limitation of this method of LIF combined with laser ab-lation is summarized and a possibly useful solution is suggested , which may be helpful to further improve the precision of radiative lifetime measurements.

关 键 词：自然辐射寿命 稀土元素 自由原子(离子) 激光诱导荧光光谱 

分 类 号：O562[理学—原子与分子物理]