Dynamics of transfer ionization in p-He collisions at intermediate energies
Dynamics of transfer ionization in p-He collisions at intermediate energies
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中间能量 p-He 碰撞中转移电离的动力学
DOI：
10.1103/physreva.95.022705
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发表时间：
2017
影响因子：
2.9
通讯作者：
Zhang P.
中科院分区：
文献类型：
--
作者：
Guo D. L.;Ma X.;Zhang S. F.;Zhu X. L.;Feng W. T.;Zhang R. T.;Gao Y.;Hai B.;Zhang M.;Qian D. B.;Yan S.;Zhang P.
我们已经完成了一个运动学完整的实验转移电离，即，用反应显微镜研究了50- 100 keV p$-He碰撞过程中，入射粒子俘获一个靶电子，并伴随着第二个电子的射出。结果发现，投射到散射平面上的电子动量分布是一个独立的两步机制，涉及一个二进制遇到的预测是一致的。结合能效应和电子与剩余反冲离子的相互作用是导致电子动量分布偏离理想双脊的原因。我们的测量与动态屏蔽经典轨迹蒙特-卡罗计算之间的良好协议强烈表明，电子-电子关联在这两个电子的过程中发挥了重要作用。
We have performed a kinematically complete experiment for transfer ionization, i.e., the capture of one target electron by the projectile accompanied by the ejection of a second electron, for 50--100 keV $p$-He collisions by means of a reaction microscope. It was found that the electron momentum distribution projected onto the scattering plane is consistent with the prediction of an independent two-step mechanism involving a binary encounter. The deviation of the electron momentum distribution from the ideal binary ridge is attributed to binding energy effects and the interaction between the electron and the residual recoil ion. The good agreement between our measurements with the dynamic-screening classical trajectory Monte-Carlo calculations strongly suggests that electron-electron correlations play an important role in this two-electron process.