Routes to nonsequential double ionization
Routes to nonsequential double ionization
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DOI：
10.1103/physrevlett.85.3781
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发表时间：
2000-10-30
影响因子：
8.6
通讯作者：
Sandner, W
中科院分区：
文献类型：
--
作者：
Kopold, R;Becker, W;Sandner, W
本文提出了一种计算强激光原子物理中多电子过程S矩阵的方法，它与单电子过程的强场近似十分相似。给定一个过程如何演化的场景，对经典作用量进行相应的近似，从而可以评估量子力学的S矩阵。将该方法应用于非顺序双电离中电子总动量的分布，并与最近的测量结果进行了比较。获得了良好的协议，氖的再散射的情况下。对于氦和氩没有类似的协议，并讨论了可能的替代方案。
A method is proposed for the calculation of the S matrix for many-electron processes in intense-laser atom physics, in close analogy to the strong-field approximation for one-electron processes. Given a scenario of how some process evolves, corresponding approximations to the classical action are made which allow for the evaluation of the quantum-mechanical S matrix. The method is applied to the distribution of the total electronic momentum in nonsequential double ionization, and the results are compared to recent measurements. Good agreement is obtained for neon for a rescattering scenario. There is no comparable agreement for helium and argon, and possible alternative scenarios are discussed.