Theoretical spectroscopic characterization of the B2Σ+ state of SiP and of the X2Π–B2Σ+ and A2Σ+–B2Σ+ transitions

The B2Σ+ electronic state, and the X2Π–B2Σ+ and A2Σ+–B2Σ+ transitions of the SiP molecule were characterized theoretically at a high-level of correlation treatment. Potential energy curves, dipole and transition moments, radiative transition probabilities, and radiative lifetimes are reported. Emission from the B state is presented as a possibility to spectroscopically characterize the ground state and the first excited A2Σ+ state with a Te value of just 470 cm−1. These transitions are predicted to lie in the blue region of the visible spectrum. SiP excited in the B state should have a radiative lifetime of 1.0 μs.