arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv physics/0010031physics.atom-phnlin.CDquant-ph
收藏

强场中原子双电离的途径

Pathways to double ionization of atoms in strong fields

Krzysztof Sacha, Bruno Eckhardt

摘要:

在经典模型下讨论了强线偏振激光场中原子双电离的最后阶段。我们建议,所有的轨迹导致非顺序双电离通过接近鞍在相空间中,我们确定和表征。鞍位于对称逃逸电子的二自由度子空间中。计算得到的离子纵动量在子空间内的分布显示出实验中观察到的双峰结构。包括一个对称的弯曲模式的电子,使我们能够重现的横向离子动量。我们还讨论了顺序电离的路径,并表明它不会导致所观察到的动量分布。

英文摘要:

We discuss the final stages of double ionization of atoms in a strong linearly polarized laser field within a classical model. We propose that all trajectories leading to non-sequential double ionization pass close to a saddle in phase space which we identify and characterize. The saddle lies in a two degree of freedom subspace of symmetrically escaping electrons. The distribution of longitudinal momenta of ions as calculated within the subspace shows the double hump structure observed in experiments. Including a symmetric bending mode of the electrons allows us to reproduce the transverse ion momenta. We discuss also a path to sequential ionization and show that it does not lead to the observed momentum distributions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑