论文标题
与能量分辨的光子角度分布区分共振对称性，从o $ _2 $中的离子对形形成两光子的吸收后9.3 eV femtsecond pulse。
Distinguishing resonance symmetries with energy-resolved photoion angular distributions from ion-pair formation in O$_2$ following two-photon absorption of a 9.3 eV femtosecond pulse
论文作者
论文摘要
我们提出了一项关于在9.3 eV femtsecond脉冲的共振剂两光子吸收后，关于O $ _2 $的离子对形成的光解离动力学的合并实验和理论研究，其中使用3-D Momentum Imaging检测到所得的O $^+$离子。 $^3σ^-_ g $和$^3π_g$对称性的离子-pair组态通过光学深色连续性rydberg状态进行访问，这些状态聚集到B $^2σ^-_ g $离子状态，这些状态是通过平行 - parallel-Parallel-Parallel-Parallel-Parallel-Parallel-Parallel-Parallel-Parlallecal-ebsellal-derpendicular-derpendicular transition transition trivesition trivestion ressondure ressondure ressondure consoss的。这种混合物在解离的角度相对于光极化的角度分布中很明显，并且随碎片离子对的动能释放（KER）而变化。依赖KER的光角分布揭示了离子对生产机制中涉及的潜在的两光子吸收动力学，并表明存在两个具有不同对称性的近乎退化的连续共振，这两个共振都可以通过内部转换耦合到相同的总体对称性的离子-PAIR状态。
We present a combined experimental and theoretical study on the photodissociation dynamics of ion-pair formation in O$_2$ following resonant two-photon absorption of a 9.3 eV femtosecond pulse, where the resulting O$^+$ ions are detected using 3-D momentum imaging. Ion-pair formation states of $^3Σ^-_g$ and $^3Π_g$ symmetry are accessed through predissociation of optically dark continuum Rydberg states converging to the B $^2Σ^-_g$ ionic state, which are resonantly populated via a mixture of both parallel-parallel and parallel-perpendicular two-photon transitions. This mixture is evident in the angular distribution of the dissociation relative to the light polarization, and varies with the kinetic energy release (KER) of the fragmenting ion-pair. The KER-dependent photoion angular distribution reveals the underlying two-photon absorption dynamics involved in the ion-pair production mechanism and indicates the existence of two nearly degenerate continuum resonances possessing different symmetries, which can both decay by coupling to ion-pair states of the same total symmetry through internal conversion.
