Double ionization of helium by electron-impact:: Complete pictures of the four-body breakup dynamics
Double ionization of helium by electron-impact:: Complete pictures of the four-body breakup dynamics
复制标题
DOI：
10.1103/physrevlett.86.3755
复制
发表时间：
2001-04-23
影响因子：
8.6
通讯作者：
Ullrich, J
中科院分区：
文献类型：
--
作者：
Dorn, A;Kheifets, A;Ullrich, J
实验研究了2keV电子碰撞He双电离动力学，动量转移为0.6a.u，过剩能量为10和40eV。完整的五倍微分截面的所有电子发射角共面几何。超越第一玻恩近似的贡献确定比较实验数据与一阶收敛的紧密耦合的计算，这是在相当好的协议与本实验比早期测量Kheietheit等人。
The dynamics of He double ionization by 2 keV electron impact is studied experimentally for a momentum transfer of 0.6 a.u, at excess energies of 10 and 40 eV. Complete sets of fivefold differential cross sections are presented for all electron emission angles in coplanar geometry. Contributions beyond the first Born approximation are identified comparing experimental data with first order convergent close-coupling calculations which are in considerably better agreement with the present experiment than with the earlier measurement of Kheifets et al.