Eu原子6p_(1/2)nl(l=0,2)自电离Rydberg态的相互作用  

Interaction of Eu Atom 6p_(1/2)nl(l=0,2)Autoionizing Rydberg States

作　　者：杨金红[1,2] 王曦[1,2] 沈礼[1,2] 戴长建[1,2] 

机构地区：[1]天津理工大学理学院,天津300384 [2]显示材料与光电器件教育部重点实验室,天津300384

出　　处：《光学学报》2013年第10期278-285,共8页Acta Optica Sinica

基　　金：国家自然科学基金(10674102,11174218)

摘　　要：为了系统地研究Eu原子的自电离光谱并讨论其多种不同的光谱特性,采用三步孤立实激发技术,分步将Eu原子从基态经中间态(4f76s6p6P5/2或4f76s6p8P5/2)共振激发到4f76sns(n=7和8)或4f76s7dRydberg态,然后将其进一步激发至4f76p1/2ns及4f76p1/27d自电离态。不仅观察到了4f76p1/2ns(n=7和8)和4f76p1/2nd自电离Rydberg系列间的组态相互作用,而且还识别出了混合于4f76p1/2ns自电离光谱中的属于其他系列的复杂结构,并对其光谱特征进行了详细分析和讨论。另外,报道了相关自电离态的能级位置、线宽和线形等重要信息,讨论了孤立实激发技术的适用条件。In order to systematically study autoionization spectra of the Eu atom and discuss their spectral characteristics, the three-step isolated core excitation （ICE） is used in the present experiment. The atom is excited from its ground state via the 4f^7 6s6p6 P5/2 or 4f 6s6ps P5/7 intermediate state to the 4f^7 6sns （ n = 7 or 8） or 4f^7 6s7d Rydberg state, from which it is further populated to the 4f76p1/2 ns （n = 7 or 8） or 4f7 6pl/27d autoionizing state. Not only the profound interaction between the 4f^7 6pl/2 ns （n = 7 or 8） and 4f^76p1/2 nd autoionization Rydberg series revealed, but also the fingerprints of other series mixed in the 4f^7 6pl/2 ns （n = 7 or 8） autoionization spectrum are identified. Moreover, the information of level energy, line width and line shape of these autoionizing states is reported, while the validity of ICE method is discussed.

关 键 词：光谱学 Eu原子 孤立实激发 自电离光谱 自电离系列相互作用 

分 类 号：O433[机械工程—光学工程]