Spectroscopic properties and transition probabilities of SiC+ cation

This paper calculates the potential energy curves, spectroscopic parameters, transition dipole moments, and transition probabilities of the SiC+ radical. The rotationless radiative lifetimes of vibrational levels are approximately 10−7 s for the 24Π and 24Σ− states, 10−5 to 10−6 s for the 22Σ− state and the first well of 14Π state, 10−5 s for the e2Π state, and very short for the second well of 14Π state. From a spectroscopic standpoint, the a2Δ, b2Π, c2Σ−, d2Σ+, A4Δ, and 14Σ+ states are insignificant. The Einstein coefficients of emissions are large between the 22Σ− and the c2Σ− state, the e2Π and the a2Δ state, the 24Σ− and the X4Σ− state, the 24Π and the X4Σ− state, the first well of 14Π state and the X4Σ− state, as well as the second well of 14Π state and the 14Σ+ state. The SOC effect on the spectroscopic parameters is insignificant for all the states except for the second well of the 14Π state.139