High-Resolution Photoelectron Imaging and Photodetachment Spectroscopy of Cryogenically Cooled IO-
- 16 July 2020
- journal article
- research article
- Published by American Chemical Society (ACS) in The Journal of Physical Chemistry A
- Vol. 124 (28), 5720-5726
- https://doi.org/10.1021/acs.jpca.0c04080
Abstract
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 the (2)Pi(3/2) and (2)Pi(1/2) states 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 repulsive (3)Pi state, and a shallow bound (1)Pi state. More interestingly, we have observed two vibrational resonances which are proposed to be due to a dipole-induced resonant state, about 230 cm(-1) above the detachment threshold of IO-.Funding Information
- Basic Energy Sciences (DE-SC0018679)
- K. C. Wong Education Foundation (GJTD-2018-10)
- National Natural Science Foundation of China (21573273, 21773289)
- Chinese Academy of Sciences (XDA21000000)
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