Time dependent screening in the photoionization of doubly excited two-electron systems

被引：13
作者：
Rosen, C [1 ]
Dörr, M
Eichmann, U
Sandner, W
机构：
[1] Max Born Inst, D-12489 Berlin, Germany
[2] Tech Univ, D-10623 Berlin, Germany
[3] Free Univ Brussels, B-1050 Brussels, Belgium
来源：
PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 22期
关键词：
D O I：
10.1103/PhysRevLett.83.4514
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We have investigated the two-electron dynamics of asymmetric doubly highly excited high angular momentum states in Sr interacting with a laser field. Even down to modest laser intensities the dominant fragmentation process is the photoionization of the inner electron. Analysis of the final ionic state reveals that the near-threshold ionization process is compatible with a time dependent screening of the nuclear charge on a time scale comparable to the orbit time of the outer electron. This is evidence of long-range dipolar correlation forces during the ionization process.
引用
收藏
页码：4514 / 4517
页数：4
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