光电子反作用于电离态$H_2^+$的电子定域
Electron localization in dissociating $H_2^+$ by retroaction of a photoelectron onto its source
摘要：
我们调查的解离$H_2^+$成一个质子和$H^0$单电离后的能量接近阈值的光子。发现当$H_2^+$沿$1sσ_g$基态解离时，$p^+$和$H^0$并不对称出现.相反，可以观察到$p^+$在逃逸光电子的方向上的优先喷射。这种对称性破缺在电子能量很小的情况下是最强的。我们的实验与Serov和Kheietov最近的预测一致[Phys.Rev.A89，031402（2014）]。在他们的模型中，经典地处理光电子，对称性破缺是由长程库仑势对离解的$H_2^+$的反作用引起的。
英文摘要：
We investigate the dissociation of $H_2^+$ into a proton and a $H^0$ after single ionization with photons of an energy close to the threshold. We find that the $p^+$ and the $H^0$ do not emerge symmetrically in case of the $H_2^+$ dissociating along the $1sσ_g$ ground state. Instead, a preference for the ejection of the $p^+$ in the direction of the escaping photoelectron can be observed. This symmetry breaking is strongest for very small electron energies. Our experiment is consistent with a recent prediction by Serov and Kheifets [Phys. Rev. A 89, 031402 (2014)]. In their model, which treats the photoelectron classically, the symmetry breaking is induced by the retroaction of the long range Coulomb potential onto the dissociating $H_2^+$.
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