Resonant two‐photon ionization spectroscopy of jet‐cooled Au3
Resonant two‐photon ionization spectroscopy of jet‐cooled Au3
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喷射冷却 Au3 的共振双光子电离光谱
DOI：
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
M. Morse
中科院分区：
文献类型：
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作者：
G. Bishea;M. Morse
使用共振双光子电离光谱法，在近红外光谱区定位了喷射冷却Au 3的带系统。原点带位于13 354.15 cm−1处，系统向蓝色方向延伸了700 cm−1以上。激发态的辐射寿命约为28 μs，对应的吸收振子强度为f = 0.0003。因此，可以认为该跃迁对应于自旋禁戒二重态（S=1/2）到四重态（S=3/2）的跃迁，这是由于自旋轨道污染而允许的，大概是在上态。在光谱中，一个完全对称的伸缩振动（ω=179.7 cm−1）的级数是明显的，沿着的是另一个模式的弱得多的级数，它显示了一种有趣的分裂模式。虽然没有一个赋值是绝对明确的，但还是提出了各种候选项。其中最有可能的是将系统指定为D3 h点群中的A 4 E '← X 2 E'过渡，同时具有地面X 2 E '和......
A band system of jet‐cooled Au3 has been located in the near infrared region of the spectrum using resonant two‐photon ionization spectroscopy. The origin band is located at 13 354.15 cm−1 and the system extends more than 700 cm−1 further to the blue. The excited state displays a radiative lifetime of approximately 28 μs, corresponding to an absorption oscillator strength of f≊0.0003. Accordingly, it is thought that the transition corresponds to a spin‐forbidden doublet (S=1/2) to quartet (S=3/2) transition, which is made allowed by spin–orbit contamination, presumably in the upper state. A progression in a totally symmetric stretching vibration (ω=179.7 cm−1 ) is obvious in the spectrum, along with a much weaker progression in another mode, which displays an interesting pattern of splittings. Although no assignment is absolutely unambiguous, various candidates are presented. The most likely of these assigns the system as an A 4E’←X 2E’ transition in the D3h point group, with both the ground X 2E’ and ...