Chen Zhangjin, Wen Hua, Liu Fang, Morishita Toru, Zatsarinny Oleg, Bartschat Klaus
Opt Express. 2020 Mar 2;28(5):6490-6504. doi: 10.1364/OE.386971.
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) × 10 W/cm. The experimentally observed V-shaped structure at high intensities [A. Rudenko et al., Phys. Rev. Lett. 99, 263003 (2007)] 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.
利用定量再散射模型，我们模拟了在强度范围为(2 - 15) × 10 W/cm的800 nm激光脉冲作用下氦原子非顺序双电离的关联双电子动量分布。实验观测到的高强度下的V形结构[A. 鲁坚科等人，《物理评论快报》99, 263003 (2007)]归因于激光诱导的再碰撞激发中的强前向散射以及从激发态隧穿电离的电子的不对称动量分布。末态电子排斥在形成V形结构中也起着重要作用。
