Effect of two-cutoff structure in laser-induced recollision dynamics

Effect of two-cutoff structure in laser-induced recollision dynamics
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激光诱导碰撞动力学中二截止结构的影响

DOI:
10.1016/j.rinp.2022.105322
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发表时间:
2022-02
期刊:
影响因子:
5.3
通讯作者:
Jing Chen
Jing Chen
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Yuxing Bai;Xiaolei Hao;Weidong Li;Jing Chen

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我们从理论上确定了第三次返回重碰撞轨迹的重碰撞能量分布中的两个截止结构,其贡献在阈值以上电离(ATI)谱的高能部分中占主导地位。重碰撞能量分布中额外的第二截止点是由库仑场加速到特定重碰撞轨迹引起的,引起二维(2D)光电子动量谱的扩展,并将影响激光诱导电子衍射(LIED)方案中提取的微分截面(DCS)。第二次截止的位置和相对产量都随着激光强度的增加而减小。因此,当激光强度不太高时,应考虑第二次截止的影响。
We theoretically identify a two-cutoff structure in the recollision energy distribution of the third-return recollision trajectories whose contribution is dominant in the high-energy part of the above-threshold ionization (ATI) spectrum. The additional second cutoff in the recollision energy distribution, resulted from the acceleration of Coulomb field to specific recollision trajectories, induces an extension of the Two-dimensional (2D) photoelectron momentum spectrum and will affect the differential cross-sections (DCS) extracted in laser-induced electron diffraction (LIED) scheme. Both the position and relative yield of the second cutoff decrease with increasing laser intensity. Therefore, the effect of the second cutoff should be taken into account when the laser intensity is not so high.
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