In this paper, we theoretically investigate the nonsequential double ionization (NSDI) process of Ne induced by linearly polarized laser field using strong field approximation theory. It is found that, with increasing laser intensity, the correlated electron momentum distributions (CEMDs) corresponding to multiple-return-collision process, which is believed to predominate in NSDI process at high intensity, exhibit a dependence on the wave function of the intermediate ionic state. This observation indicates that the information of the intermediate ionic state in NSDI process can be extracted from CEMD at specific laser intensity.

中文翻译：

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强场双电离中离子态分辨电子-电子关联的强度依赖性

在本文中，我们使用强场近似理论从理论上研究了由线偏振激光场引起的 Ne 的非连续双电离 (NSDI) 过程。研究发现，随着激光强度的增加，与多次返回碰撞过程相对应的相关电子动量分布（CEMD）被认为在高强度的 NSDI 过程中占主导地位，表现出对中间离子波函数的依赖性。状态。这一观察表明，在特定激光强度下，可以从 CEMD 中提取 NSDI 过程中的中间离子态信息。