Product state distributions in the dissociation of H3 (n=2,3) Rydberg states
Product state distributions in the dissociation of H3 (n=2,3) Rydberg states
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H3 解离中的产物态分布 (n=2,3) Rydberg 态
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
P. Cosby
中科院分区：
文献类型：
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作者：
U. Müller;P. Cosby
使用快速中性束光碎片光谱仪研究了 H3 分子的 2s 2A1'、2p 2A2"、3s 2A1' 和 3d 2E" Rydberg 态的解离。通过 Cs 蒸气中 H+3 离子的电荷转移中和产生的 3–6 keV 亚稳态 H3 2p 2A2" (N=K=0) 分子束与激光束相交，以选择性地填充每个 H3 态中的特定振动水平以供研究。由 H3 态解离产生的相关碎片 H+H2 对由时间和位置敏感探测器观察，该探测器指定碎片的质心动能释放和弹射角度。 3s 2A1' (N=1, K=0) 和 3d 2E" (N=1, G=0, R=1) 旋转能级是通过使用可调谐染料激光器从 2p 2A2" (N=K=0) 能级泵浦跃迁而在其基振动态或振动激发态下制备的。观察到所有这些光激发能级都预解离并辐射到解离基态。相比之下，2s 2A1...
Dissociation of the 2s 2A1′, 2p 2A2″, 3s 2A1′, and 3d 2E″ Rydberg states of the H3 molecule is investigated using a fast neutral beam photofragment spectrometer. A beam of 3–6 keV metastable H3 2p 2A2″ (N=K=0) molecules, generated by charge transfer neutralization of H+3 ions in Cs vapor, is intersected by a laser beam to selectively populate a specific rovibrational level in each of the H3 states for study. The correlated pair of fragments H+H2, created by dissociation of the H3 state, is observed by a time‐ and position‐sensitive detector, which specifies the fragments’ center‐of‐mass kinetic energy release and angle of ejection. The 3s 2A1′ (N=1, K=0) and 3d 2E″ (N=1, G=0, R=1) rotational levels are prepared either in their ground vibrational states or in vibrationally excited states by pumping transitions from the 2p 2A2″ (N=K=0) level with a tunable dye laser. All of these photoexcited levels are observed to both predissociate and to radiate into the dissociative ground state. In contrast, the 2s 2A1...