ATI as a source for multiply charged ion production in a laser field
ATI as a source for multiply charged ion production in a laser field
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DOI：
10.1088/0953-4075/28/23/016
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发表时间：
1995-12
期刊：
影响因子：
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通讯作者：
M. Kuchiev
中科院分区：
文献类型：
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作者：
M. Kuchiev
提出了多电子多光子过程的理论。结果表明，单电子激发到连续体 (ATI) 中的某个能级后，受激电子与母体原子粒子的非弹性碰撞可以导致离子的激发。它可以是产生双电荷离子的连续态激发，也可以是也极大地增强双电荷离子产生的离散态。这些现象发生的概率大大超过单电荷离子直接电离的概率。即使在中等场强下，单电子 ATI 也使得双电子过程成为可能。讨论了在 780 nm 激光场中强度高于 ~1014 W cm-2 的 He 原子双电子激发的示例。
A theory for the many-electron multiphoton process is presented. It is shown that after single-electron excitation into some level in the continuum (ATI) an inelastic collision of the excited electron with the parent atomic particle can result in an excitation of the ion. It may be the continuum state excitation giving the doubly charged ion or the discrete state which also greatly enhances the doubly charged ion production. The probability of these phenomena greatly exceeds that of the direct ionization of a single-charged ion. The single-electron ATI makes possible the two-electron process even in a moderate field. The example of two-electron excitations of an He atom in a 780 nm laser field with intensity above ~1014 W cm-2 is discussed.