Binary and recoil collisions in strong field double ionization of helium
Binary and recoil collisions in strong field double ionization of helium
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DOI：
10.1103/physrevlett.99.263002
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发表时间：
2007-12-31
影响因子：
8.6
通讯作者：
Doerner, R.
中科院分区：
文献类型：
--
作者：
Staudte, A.;Ruiz, C.;Doerner, R.
在波长为800 nm，功率密度为4.5 × 10 ~（14）W/cm ~ 2的激光场中，研究了氦原子非顺序双电离产生的两个电子的关联动量分布。利用高分辨符合技术，我们在关联电子动量分布中发现了一个迄今为止未观察到的指状结构。该结构可以解释为在结晶过程中的微观动力学的签名。我们确定的功能对应的二进制和反冲波瓣在无场（E，2 E）碰撞。这种解释是支持分析从头算解决方案的一个完全相关的三维氦模型。
We have investigated the correlated momentum distribution of both electrons from nonsequential double ionization of helium in a 800 nm, 4.5x10(14) W/cm(2) laser field. Using very high resolution coincidence techniques, we find a so-far unobserved fingerlike structure in the correlated electron momentum distribution. The structure can be interpreted as a signature of the microscopic dynamics in the recollision process. We identify features corresponding to the binary and recoil lobe in field-free (e,2e) collisions. This interpretation is supported by analyzing ab initio solutions of a fully correlated three-dimensional helium model.