论文标题
在氩气中库珀最小值附近的摄影动力学
Attosecond photoionization dynamics in the vicinity of the Cooper minima in argon
论文作者
论文摘要
使用频谱分辨的电子干涉测量技术，我们测量了光电离时间延迟在$ 3S $和$ 3p $ $ $ $ $ 34-ev的能源范围内，涵盖了两个子壳中的库珀最小值。观察到的3s-3p $延迟差异（包括符号变化）的强大变化通过理论计算很好地复制了使用Two-Photon两色随机相近似与Exchange。强大的改进频道导致光电子与$ 3S $ subshell散发的光电子重叠。这些渠道需要包括在我们的分析中以重现实验数据。我们的测量为旨在准确描述通道间相关性的多层理论模型提供了严格的测试。
Using a spectrally resolved electron interferometry technique, we measure photoionization time delays between the $3s$ and $3p$ subshells of argon over a large 34-eV energy range covering the Cooper minima in both subshells. The observed strong variations of the $3s-3p$ delay difference, including a sign change, are well reproduced by theoretical calculations using the Two-Photon Two-Color Random Phase Approximation with Exchange. Strong shake-up channels lead to photoelectrons spectrally overlapping with those emitted from the $3s$ subshell. These channels need to be included in our analysis to reproduce the experimental data. Our measurements provide a stringent test for multielectronic theoretical models aiming at an accurate description of inter-channel correlation.
