Eu原子4f^76p_(3/2)ns自电离衰变分支比和弹射电子角分布  

Branching ratio and angular distribution of ejected electrons from Eu 4f^76p_(3/2)ns autoionizing states

作　　者：王靖 沈礼[1] 杨玉娜[1] 戴长建[1] WANG Jing;SHEN Li;YANG Yuna;DAI Chang-Jian(School of Science,Tianjin University of Technology,Tianjin 300384,China)

机构地区：[1]天津理工大学理学院,天津300384

出　　处：《原子与分子物理学报》2018年第3期374-382,共9页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(11174218)

摘　　要：首先运用孤立实激发技术将Eu原子从基态4f^76s^(28)S_(7/2)经中间态4f^76s6p共振激发到4f^76sns Rydberg态,然后再将其进一步激发至4f^76p_(3/2)ns(n=7,8)自电离态.其次,采用速度影像技术对Eu原子自电离弹射出的电子进行探测,以便来研究自电离衰变分支比和弹射电子角分布.在研究自电离衰变分支比时,重点讨论了粒子数反转的可能性,并依据此现象可为实现自电离激光器提供有价值的信息.另外,还探讨了各向异性参数对弹射电子角分布的影响;以及在Eu原子不同自电离几率位置处,讨论了弹射电子角分布形状的变化情况.First,the Eu atom is excited from the 4f^76s^（28） S（7/2） ground state to the 4f^76 sns Rydberg state via the4f^76s6 p intermediate state,then excited to the 4f^76p（3/2） ns（ n = 7,8） autoionizing states with the isolated core excitation method. Then,the ejected electrons from the Eu autoionization process are detected by using the velocity map imaging technique to study the autoionization branching ratio and the angular distributions of ejected electrons. When the autoionization branching ratio is studied,the possibility of the population inversion is mainly discussed. This phenomenon can provide useful information for the realization of the autoionization laser. In addition,the impacts of the anisotropic parameters on the angular distributions of ejected electrons are discussed.Furthermore,at the different positions of Eu autoionzaion probability,the shapes of the angular distributions of ejected electrons are also discussed.

关 键 词：Eu原子 4f76p3/2ns自电离态 分支比 角分布 

分 类 号：O433[机械工程—光学工程]