Attosecond cascades and time delays in one-electron photoionization
Attosecond cascades and time delays in one-electron photoionization
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DOI：
10.1103/physreva.86.033423
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发表时间：
2012-09-21
影响因子：
2.9
通讯作者：
Ivanov, Misha
中科院分区：
文献类型：
--
作者：
Sukiasyan, Suren;Ishikawa, Kenichi L.;Ivanov, Misha
我们用时间分辨从头算方法研究了激发氦原子单电子、单XUV光子电离过程中电子-电子关联的阿秒动力学。我们在这些动力学中发现了多个时间尺度，这是由于初始振动激发与出射电子与核心的正电子相互作用引起的激发级联的相互作用所引起的。这些激发级联的时间尺度和结构与从较深束缚轨道上抬起的“活跃的”连续电子穿过驻留在外层轨道的“被动”电子的轨道所需的时间直接相关。
We present time-resolved ab initio study of the attosecond dynamics of electron-electron correlation during single-electron, single XUV-photon ionization of an excited helium atom. We identify multiple time scales in these dynamics, caused by the interplay of the initial shake-up excitation with the excitation cascades induced by the postionization interaction of the outgoing electron with the core. The time scales and the structure of these excitation cascades are directly linked to the time it takes the "active" continuum electron, lifted from a deeper bound orbital, to traverse the orbit of the "passive" electron residing in the outer orbit.