Channel switching in above-threshold ionization of xenon

被引:82
|
作者
Schyja, V [1 ]
Lang, T [1 ]
Helm, H [1 ]
机构
[1] Univ Freiburg, Dept Mol & Opt Phys, D-79104 Freiburg, Germany
来源
PHYSICAL REVIEW A | 1998年 / 57卷 / 05期
关键词
D O I
10.1103/PhysRevA.57.3692
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The intensity dependence of the angular and energy distributions of photoelectrons is used to map the effect of channel closing in short-pulse, multiphoton ionization of xenon. At 800 nm, we observe the nine-photon channel to close at approximate to 3 x 10(13) W/cm(2) and the dominant ionization path to switch from (8 + 1)-photon resonant ionization via f-type Rydberg states to (9 + 1)-photon resonant ionization via g-type Rydberg states. Very low-energy electrons are observed prior to reaching the channel closing intensity, indicative of a contribution of nonresonant ionization.
引用
收藏
页码:3692 / 3697
页数:6
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