Ab initio calculation on the low-lying excited states of Si2+ cation including spin-orbit coupling

- 24 Λ-S states are correlated to the dissociation limit of Si(3Pg) + Si+(2Pu) are first reported.
- The dissociation energies of the calculated electronic states are predicted in our work.
- It is first time that the entire 54 Ω states generated from the 24 Λ-S states have been studied.
- PECs of Λ-S and Ω states are depicted with the aid of avoided crossing rule between the same symmetry.