论文标题
H $ _3^+$编队的新途径的观察和动态控制
Observation and dynamic control of a new pathway of H$_3^+$ formation
论文作者
论文摘要
我们提出并在实验上证明可以通过分子氢二聚体的单光化（H $ _4 $）产生三氢阳离子（H $ _3^+$）。使用近红外，飞秒激光脉冲和巧合动量成像，我们发现二聚体单电离后的主要通道是在几百个飞秒内的氢原子的弹出，留下了H3+阳离子。由Ab-Initio分子动力学模拟支持并很好地支持了形成机理。这是从超低氢气中h $ _3^+$造型的新途径，可能有助于解释宇宙中星际介质中H $ _3^+$的意外高丰度。
We propose and experimentally demonstrate that the trihydrogen cation (H$_3^+$) can be produced via single photoionization of the molecular hydrogen dimer (H$_4$). Using near-infrared, femtosecond laser pulses and coincidence momentum imaging, we find that the dominant channel after single ionization of the dimer is the ejection of a hydrogen atom within a few hundred femtoseconds, leaving an H3+ cation behind. The formation mechanism is supported and well reproduced by an ab-initio molecular dynamics simulation. This is a new pathway of H$_3^+$ formation from ultracold hydrogen gas that may help explain the unexpected high abundance of H$_3^+$ in the interstellar medium in the universe.
