AI 中文总结
本研究通过静电偏转器调控CF₂I₂初始转动态，发现转动能量可显著改变其强场解离电离动力学，揭示了转动激发在非绝热动力学中的关键作用。
AI 中文摘要
我们采用静电偏转器制备了处于不同初始转动态分布的CF₂I₂系综，研究了其强场解离电离过程。离子通道分支比的显著变化表明，碎片动力学对初始转动激发具有强依赖性。通过分析碎片产额及其激光功率依赖性，确定了通过中间激发态CF₂I₂*的共振增强多光子电离过程。测得的分支行为显示，在近阈值非绝热科里奥利型耦合驱动下，结合态离子的稳定化与解离通道之间存在竞争。仅通过几微电子伏特的转动能量调谐，就足以显著改变电离动力学并重新分配反应产物。这些发现证明了转动激发在控制CF₂I₂强场电离后非绝热动力学中的关键作用。
英文摘要
We investigated strong-field dissociative ionization of $\mathrm{CF_2I_2}$ ensembles prepared in different initial rotational-state distributions using an electrostatic deflector. Pronounced changes in ion-channel branching ratios revealed a strong dependence of the fragmentation dynamics on the initial rotational excitation. Analysis of fragment yields and their laser-power dependences identifies resonance-enhanced multiphoton ionization through an intermediate excited state, $\mathrm{CF_2I_2^{\ast}}$. The measured branching behavior indicates competition between stabilization into bound ionic states and dissociative channels, driven by near-threshold non-adiabatic Coriolis-type coupling. Tuning the rotational energy by only a few $μ$eV is sufficient to significantly alter the ionization dynamics and to redistribute the reaction products. These findings demonstrate the key role of rotational excitation in controlling non-adiabatic dynamics following strong-field ionization of $\mathrm{CF_2I_2}$.
