arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2201.12160physics.atom-ph
收藏

利用束缚电子间相互作用的有效库仑势，在强驱动原子中电离三个或更多电子的通用模型和工具包

A general model and toolkit for the ionization of three or more electrons in strongly driven atoms using an effective Coulomb potential for the interaction between bound electrons

M. B. Peters, G. P. Katsoulis, A. Emmanouilidou

阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

摘要：

我们建立了一个三维半经典模型来研究强红外激光脉冲驱动下三电子原子的三重和双重电离。在时间传播过程中，我们的模型充分考虑了库仑奇点，激光脉冲的磁场和原子核的运动，同时也考虑了三个电子的运动。我们开发的框架是通用的，可以考虑在强驱动原子的多电子电离与三个以上的电子。为了避免三个或更多电子的经典模型中出现的非物理自电离，我们用有效库仑势代替束缚电子对之间的库仑势。电子之间的库仑力，而不是都绑定完全考虑。我们开发了一套标准，以确定电子在时间传播过程中成为约束。我们比较了电离光谱与模型在这里开发和海森堡模型，其中包括一个潜在的限制电子接近核心。这样的谱包括沿激光场方向的电子动量之和以及相关的电子动量。我们还比较了这些结果与实验。

英文摘要：

We formulate a three-dimensional semi-classical model to address triple and double ionization in three-electron atoms driven by intense infrared laser pulses. During time propagation, our model fully accounts for the Coulomb singularities, the magnetic field of the laser pulse and for the motion of the nucleus at the same time as for the motion of the three electrons. The framework we develop is general and can account for multi-electron ionization in strongly-driven atoms with more than three electrons. To avoid unphysical autoionization arising in classical models of three or more electrons, we replace the Coulomb potential between pairs of bound electrons with effective Coulomb potentials. The Coulomb forces between electrons that are not both bound are fully accounted for. We develop a set of criteria to determine when electrons become bound during time propagation. We compare ionization spectra obtained with the model developed here and with the Heisenberg model that includes a potential term restricting an electron from closely approaching the core. Such spectra include the sum of the electron momenta along the direction of the laser field as well as the correlated electron momenta. We also compare these results with experimental ones.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

↑