Ba原子6pnd自电离态的光谱研究  

Autoionization spectra of Ba 6pnd(J=1,3)states

作　　者：袁卫国[1] 戴长建[1] 

机构地区：[1]天津理工大学理学院,天津300384

出　　处：《天津理工大学学报》2008年第2期1-4,共4页Journal of Tianjin University of Technology

基　　金：国家自然科学基金(10574098;10674102);天津市自然科学基金(05YFJMJC05200);天津理工大学特聘教授专项科研基金(069-000004)

摘　　要：采用三台可调谐激光器和孤立实激发技术,是将处于基态的Ba原子分三步激发到6p1/2nd和6p3/2nd(J=1,3)自电离态上,并通过频率扫描获得了这些自电离态的光谱.本文着重研究了从钡原子的6 snd3D2Rydberg态激发的那些较低的自电离态的光谱.通过对实验光谱的线形拟合,得到了上述原子态的能级位置和宽度等实验数据,进而获得了量子亏损和约化宽度等微观信息.通过对这些自电离光谱的分析和比较,讨论了它们在6p1+/2电离限附近的光谱特征及其产生机制.The 6p1/2 nd and 6p3/2 nd （J = 1,3 ） autoionizing states of Ba atom, especially those with lower principal quantum number, have been experimentally studied, using the isolated core excitation scheme with three dye lasers. Level energies and widths of 6p1/2nd and 6p3/znd（J = 1,3 ） autoionizing states, which are excited from 6snd 3D2 Rydberg states are reported. A discussion is made based on comparison between spectra of different autoionizing states, quite closed to the 6p ＋ 1/2 threshold, so that one may explain the complex spectral structures of these autoionizing states.

关 键 词：孤立实激发 组态相互作用 自电离态 

分 类 号：O433[机械工程—光学工程]