Single-photon double ionization of the hydrogen molecule
Single-photon double ionization of the hydrogen molecule
复制标题
氢分子的单光子双电离
DOI：
10.1088/0953-4075/38/13/021
复制
发表时间：
2005
期刊：
影响因子：
--
通讯作者：
T. Pattard
中科院分区：
文献类型：
--
作者：
C. Siedschlag;T. Pattard
在较宽的光子能量范围内，我们从理论上研究了分子氢的单光子双电离。我们的数值方法是基于单光子多重电离的半碰撞图像，并采用量子-经典混合方法，将双电离过程分为抖动和敲除两部分。我们证明了该方法可以成功地推广到具有两个独立核的分子靶系统中，这种方法以前已经应用于氦的双光电离。这里给出的处理方法既允许以与实验和最近的从头计算合理一致的计算简单的方式计算分子的双光电离，也允许以简单的准经典图像的形式对结果进行物理理解。
We investigate the single-photon double ionization of molecular hydrogen theoretically over a wide range of photon energies. Our numerical approach is based on the half-collision picture of single-photon multiple ionization and employs a mixed quantum-classical method that splits the double ionization process into a shake-off and a knockout part. We demonstrate that this approach, which has been applied to the double photoionization of helium before, can be successfully extended to the case of molecular target systems with two separate nuclei. The treatment given here allows for both a computationally simple way of calculating molecular double photoionization in reasonable agreement with experiment and recent ab initio calculations, and a physical understanding of the results in terms of a simple quasiclassical picture.