Breakdown of the independent electron approximation in sequential double ionization
Breakdown of the independent electron approximation in sequential double ionization
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DOI：
10.1088/1367-2630/13/9/093008
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发表时间：
2011-05
影响因子：
3.3
通讯作者：
A. N. Pfeiffer;C. Cirelli;M. Smolarski;Xu Wang;J. Eberly;R. Dorner;U. Keller
中科院分区：
文献类型：
--
作者：
A. N. Pfeiffer;C. Cirelli;M. Smolarski;Xu Wang;J. Eberly;R. Dorner;U. Keller
强场双电离中的关联电子发射主要由第一个电离电子与其母离子的碰撞决定。在接近圆偏振的激光脉冲下，电子的电离可以被极大地改变或避免，并且电子通常被假设为场电离而没有相互作用。在这里，我们提出了符合动量测量的双电荷离子和两个电子，这是不同意的独立电子假设接近圆极化场。这些实验表明，在强场双电离中，电子的相互作用并不是导致关联电子发射的唯一机制。
Correlated electron emission in strong field double ionization is dominated by recollision of the first ionized electron with its parent ion. With laser pulses that are close-to-circularly polarized, recollision may be greatly modified or avoided and the electrons are usually assumed to be field ionized without mutual interaction. Here, we present coincidence momentum measurements of the doubly charged ion and the two electrons, which are in disagreement with the independent electron assumption for close-to-circularly polarized fields. These experiments demonstrate that recollision is not the only mechanism that can lead to correlated electron emission in strong field double ionization.