光解作为探针的H $_3^+$避免了交叉缝
Photodissociation as a probe of the H$_3^+$ avoided crossing seam
摘要：
实验研究了避免交叉缝在H $_3^+$光解中的作用。解离产物的三维成像用于确定断裂通道之间的动能释放和分支比。通过H $_2^+$产物的解离电荷转移测量振动分布。发现热的H $_3^+$在近紫外光下的光解离产生冷的H $_2^+$，而热的H $_2$ .沿排斥性势能面对波包动力学进行建模说明了地面势能面的再布居。避免交叉缝的作用被强调，并强调其重要性的天体物理学相关的电荷转移反应。
英文摘要：
Experiments are conducted to investigate the role of the avoided crossing seam in the photodissociation of H$_3^+$. Three-dimensional imaging of dissociation products is used to determine the kinetic energy release and branching ratio among the fragmentation channels. Vibrational distributions are measured by dissociative charge transfer of H$_2^+$ products. It is found that the photodissociation of hot H$_3^+$ in the near ultraviolet produces cold H$_2^+$, but hot H$_2$. Modelling the wavepacket dynamics along the repulsive potential energy surface accounts for the repopulation of the ground potential energy surface. The role of the avoided crossing seam is emphasized and its importance for the astrophysically relevant charge transfer reactions is underlined.
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