The effect of electron-electron correlation on the attoclock experiment
The effect of electron-electron correlation on the attoclock experiment
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DOI：
10.1088/0953-4075/48/24/245602
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发表时间：
2015-12-28
影响因子：
1.6
通讯作者：
Landsman, A. S.
中科院分区：
文献类型：
--
作者：
Emmanouilidou, A.;Chen, A.;Landsman, A. S.
我们用半经典模型研究了氦的强场电离中的多电子效应，该模型不同于其他常用的理论方法，它考虑了电子-电子的关联。我们的方法还有一个额外的优势，即允许选择性地关闭来自母离子的不同贡献(如剩余电子或核电荷)，从而详细研究ATTOCLOCK实验中的最终电子角是如何受到这些贡献的影响的。我们发现，束缚电子对最终电子动量分布有很大的影响，然而，这种影响可以由适当选择的平均场来解释。我们的结果与其他广泛使用的单活电子近似下的理论模型吻合得很好。
We investigate multi-electron effects in strong-field ionization of helium using a semi-classical model that, unlike other commonly used theoretical approaches, takes into account electron-electron correlation. Our approach has an additional advantage of allowing to selectively switch off different contributions from the parent ion (such as the remaining electron or the nuclear charge) and thereby investigate in detail how the final electron angle in the attoclock experiment is influenced by these contributions. We find that the bound electron exerts a significant effect on the final electron momenta distribution that can, however, be accounted for by an appropriately selected mean field. Our results show excellent agreement with other widely used theoretical models done within a single active electron approximation.