论文标题
通过Attsond激光脉冲在霓虹灯中对齐激发态的光电离
Photoionization of aligned excited states in neon by attosecond laser pulses
论文作者
论文摘要
我们从数值上描述了由线性和循环极化的XUV XUV激光脉冲诱导的电离过程，在对齐的原子靶标上，特别是激发态ne $^*（1S^22S^22p^22p^5 [{} {}^2^2 \ 2 \ 2 \ 2 \ p}^{p}^\ text {p}^\ text {o} {o} {o} _ {p}^p text {1/2}我们通过应用时间依赖性的限制空间自洽场（TD-RASSCF）方法来计算激发原子状态以充分说明电子相关性。我们发现，相关辅助电离通道可以在无需相关的情况下占主导地位。我们还观察到，与线性极化的情况相比，可以用可访问的电离通道的差异来解释光电子动量分布与圆极化激光脉冲的旋转。这项研究表明，必须包含电子相关效应，以获得来自对齐激发态的光电发射动力学的准确描述。
We describe numerically the ionization process induced by linearly and circularly polarized XUV attosecond laser pulses on an aligned atomic target, specifically, the excited state Ne$^*(1s^22s^22p^5[{}^2\text{P}^\text{o}_{1/2}]3s[^1\text{P}^o])$. We compute the excited atomic state by applying the time-dependent restricted-active-space self-consistent field (TD-RASSCF) method to fully account for the electronic correlation. We find that correlation-assisted ionization channels can dominate over channels accessible without correlation. We also observe that the rotation of the photoelectron momentum distribution by circularly polarized laser pulses compared to the case of linear polarization can be explained in terms of differences in accessible ionization channels. This study shows that it is essential to include electron correlation effects to obtain an accurate description of the photoelectron emission dynamics from aligned excited states.
