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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Mass-Resolved Resonance Enhanced Ionization Study of Complicated Excited Electronic States of Rb2 near 430 nm and Their Predissociation Dynamics
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Mass-Resolved Resonance Enhanced Ionization Study of Complicated Excited Electronic States of Rb2 near 430 nm and Their Predissociation Dynamics

机译：Rb2在430 nm附近的复杂激发电子态的质量分辨共振增强电离研究及其离解动力学

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摘要

We have investigated the Rb2 430 nm system by resonance enhanced two-photon ionization and photofragment yield spectroscopy.Four electronically excited states have been assigned,and their two-channel(fast and slow)predissociation has been observed.For the 3 ~1II_u,3 ~1SIGMA~+,3 ~3II_u(0_u~+),and 3 ~3II_u(1_u)states,electronic term values(T_e)and vibrational constants(omega_e and omega_e x_e)have been determined.For the predissociation dynamics,we have observed the fast predissociation threshold between the isotopically shifted 3 ~1II_u v'=14 levels of 85Rb2 and 85Rb87Rb where the 4 ~2D_(5/2)+5 ~2S_(1/2)atomic fine-structure limit is located.The 1 ~3DELTA_u state corresponding to the 4 ~2D_(5/2)+5 ~2S_(1/2)atomic fine-structure limit has been assigned to the predissociating perturber responsible for the fast channel.Also,we have found that the fast channel branches out into two finer product channels due to long-range potential crossing.
机译：我们通过共振增强双光子电离和光碎裂产率光谱研究了Rb2 430 nm系统，分配了四个电子激发态，并观察到它们的两通道（快和慢）预离解。3〜1II_u，3 〜1SIGMA〜+，3〜3II_u（0_u〜+）和3〜3II_u（1_u）状态，电子项值（T_e）和振动常数（omega_e和omega_e x_e）已确定。对于预分解动力学，我们已经观察到同位素位移3〜1II_u v'= 14的85Rb2和85Rb87Rb水平之间的快速预离解阈值，其中4〜2D_（5/2）+5〜2S_（1/2）原子精细结构极限位于1〜对应于4〜2D_（5/2）+5〜2S_（1/2）原子精细结构极限的3DELTA_u状态已分配给负责快速通道的预离解扰动。此外，我们发现快速通道分支由于远距离电势交叉，可以分为两个更精细的产品渠道。

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