Spin-orbit state-selective autodetachment of vibrationally excited CCP−
Kocheril, G. Stephen
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https://hdl.handle.net/2142/100619
Description
Title
Spin-orbit state-selective autodetachment of vibrationally excited CCP−
Author(s)
Kocheril, G. Stephen
Contributor(s)
Wang, Lai-Sheng
Cheung, Ling Fung
Czekner, Joseph
Issue Date
2018-06-19
Keyword(s)
Clusters/Complexes
Abstract
The linear dicarbon phosphide molecule (CCP) has a 2Π ground electronic state with a small spin-orbit splitting into 2Π1/2 and 2Π3/2 states. It has a reasonably large dipole moment and has been observed in interstellar space. We have studied CCP− ion using high-resolution photoelectron imaging and observed dipole-bound excited states for CCP− right below the detachment threshold. Resonant photoelectron spectra have been obtained by exciting the anion to specific vibrational levels of the dipole-bound states. We have observed a dipole-bound state for each spin-orbit state and the vibrational autodetachment is state-selective, providing the first spectroscopic evidence that the dipole-bound electron does not couple to the neutral core.
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