High-Resolution Photoelectron Imaging and Photodetachment Spectroscopy of Cryogenically Cooled IO-
High-Resolution Photoelectron Imaging and Photodetachment Spectroscopy of Cryogenically Cooled IO-
复制标题
低温冷却 IO- 的高分辨率光电子成像和光分离光谱
DOI：
10.1021/acs.jpca.0c04080
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发表时间：
2020
影响因子：
2.9
通讯作者：
Wang Lai-Sheng
中科院分区：
文献类型：
--
作者：
Wang Yong-Tian;Ning Chuan-Gang;Liu Hong-Tao;Wang Lai-Sheng
我们报道了低温冷却IO-的高分辨光电子成像和光剥离光谱研究。高分辨光电子能谱得到IO的电子亲合势为2.3805（5）eV，IO的2 Π3/2和2 Π1/2态的自旋轨道分裂能为2093（5）cm-1。光剥离光谱证实了几个激发态的IO-阴离子的理论计算预测，包括两个价型激发态，排斥3 Π态，和浅bound 1 Π态。更有趣的是，我们已经观察到两个振动共振，这是由于偶极诱导的共振态，约230 cm-1以上的IO-的脱离阈值。
We report a high-resolution photoelectron imaging and photodetachment spectroscopy study of cryogenically cooled IO–. The high-resolution photoelectron spectra yield a more accurate electron affinity (EA) of 2.3805(5) eV for IO as well as a more accurate spin–orbit splitting energy between the2Π3/2and2Π1/2states of IO as 2093(5) cm–1. Photodetachment spectroscopy confirmed several excited states for the IO–anion predicted by theoretical calculations, including two valence-type excited states, the repulsive3Π state, and a shallow bound1Π state. More interestingly, we have observed two vibrational resonances which are proposed to be due to a dipole-induced resonant state, about 230 cm–1above the detachment threshold of IO–.