Direct imaging of excited electronic states using diffraction techniques: Theoretical considerations
Direct imaging of excited electronic states using diffraction techniques: Theoretical considerations
复制标题
DOI：
10.1016/0009-2614(96)01108-6
复制
发表时间：
1996-11-15
影响因子：
2.8
通讯作者：
Wilson, KR
中科院分区：
文献类型：
--
作者：
BenNun, M;Martinez, TJ;Wilson, KR
我们说明了原子电子激发时电子密度分布的变化可以显著地改变它们的X射线和电子衍射，表明激发电子态的电子结构可以用光泵浦-衍射探针技术直接观察到。尽管总电子密度的变化很小，但在衍射实验的逆k空间中观察到了显着的变化。泵浦-探测衍射图案被解释为激发电子态的扩展和非球形结构。
We illustrate that the change in electron density distribution upon electronic excitation of atoms can significantly change their X-ray and electron diffraction, suggesting that electronic structures of excited electronic states may be directly observed using optical pump-diffraction probe techniques, Three electronic states of lithium are used to demonstrate changes in X-ray and electron diffraction patterns. Even though the changes in the total electron densities are small, significant changes are observed in inverse k space, the domain of diffraction experiments. The pump-probe diffraction patterns are interpreted in terms of extended and non-spherical structures of excited electronic states.