Using the quantitative rescattering model, we simulate the correlated two-electron momentum distributions for nonsequential double ionization of helium by 800 nm laser pulses at intensities in the range of (2 − 15) × 10¹⁴ W/cm². The experimentally observed V-shaped structure at high intensities [Phys. Rev. Lett. 99, 263003 (2007) [CrossRef] ] is attributed to the strong forward scattering in laser-induced recollision excitation and the asymmetric momentum distribution of electrons that are tunneling-ionized from the excited states. The final-state electron repulsion also plays an important role in forming the V-shaped structure.

中文翻译：

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氦气非顺序双电离的强度依赖性

使用定量散射模型，我们以（2 − 15）×10 ¹⁴ W / cm ²范围内的强度通过800 nm激光脉冲模拟了氦的非序贯双电离的相关双电子动量分布。实验观察到的高强度V形结构[Phys。莱特牧师 99，263003（2007）[交叉引用] ]归因于在激光诱导的再冲突激发强前向散射和是隧穿电离从激发态的电子的非对称动量分布。最终状态的电子排斥在形成V形结构中也起着重要作用。