Theoretical study of the B3Σu−−X3Σg− and B″3Πu−X3Σg − band systems of S2

Multireference configuration-interaction (MRCI) wavefunctions and potential energy curves have been calculated for the X3Σg−, B3Σu−, and B″3Πu states of S2 using correlation consistent Gaussian basis sets. These wavefunctions are utilized to compute the transition dipole moments of the B3Σu−−X3Σg− and B″3Πu−X3Σg− systems. Oscillator strengths, transition probabilities, and radiative lifetimes are computed for the BX and B″X systems and comparison is made with experimental data.