论文标题
角度分辨时间延迟用于氦气的重大电离
Angle-resolved time delays for shake-up ionization of helium
论文作者
论文摘要
最近通过角度分辨的Rabbitt实验表明，光离子延迟取决于光电子的发射角。在这项工作中，我们证明，对于辅助氦气的光发射（相关卫星），时间延迟的角变化通过光电子和IR领域中高度极化的绑定电子之间的偶极耦合大大增强。我们表明，由于原子电位，IR场的连续脉冲（CC）耦合，由于原子电位延迟的添加性规则，并且由于这种两电子过程对于角度分辨的Rabbitt仍然有效。我们的结果预计还适用于其他高度极化或具有永久偶极矩的多电子系统。
Recent angle-resolved RABBITT experiments have shown that the photoionization time delay depends on the emission angle of the photoelectron. In this work we demonstrate that for photoemission from helium accompanied by shake-up (correlation satellites), the angular variation of the time delay is dramatically enhanced by the dipolar coupling between the photoelectron and the highly polarizable bound electron in the IR field. We show that the additivity rule for the time delays due to the atomic potential, the continuum-continuum (cc) coupling by the IR field, and due to this two-electron process remains valid for angle-resolved RABBITT. Our results are expected to be also applicable to other multi-electron systems that are highly polarizable or feature a permanent dipole moment.
