大规模平行电离触发的多电子动力学
Many-electron dynamics triggered by massively parallel ionization
摘要：
团簇或生物分子中多个原子的大规模平行电离被认为是一种新的光-物质相互作用现象，通过短而强的自由电子激光脉冲使其成为可能。几乎同时从被照射的目标发射的光电子可以具有如此高的密度，使得它们即使在光电离之后也基本上相互作用。这种相互作用的结果在一个特征的电子光谱，可以解释为卷积的平均场电子动力学和二进制电子-电子碰撞。我们证明，这个普遍的频谱可以得到分析总结合成两体库仑碰撞事件。此外，我们提出了一个实验与氢团簇观察大规模并行电离。
英文摘要：
Massively parallel ionization of many atoms in a cluster or bio-molecule is identified as new phenomenon of light-matter interaction which becomes feasible through short and intense FEL pulses. Almost simultaneously emitted from the illuminated target the photo-electrons can have such a high density that they interact substantially even after photo-ionization. This interaction results in a characteristic electron spectrum which can be interpreted as convolution of a mean-field electron dynamics and binary electron-electron collisions. We demonstrate that this universal spectrum can be obtained analytically by summing synthetic two-body Coulomb collision events. Moreover, we propose an experiment with hydrogen clusters to observe massively parallel ionization.
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