Electronic spectrum of SnSi+: A MRDCI study

Multireference configuration interaction calculations are performed on the SnSi+ ion to study its electronic spectrum. Potential energy curves of the ground and low-lying states up to 35 000 cm−1 are constructed. Spectroscopic constants (Te, re, Ïe) of 18 bound states are calculated. The spin–orbit coupling is also included in the calculation to study its effect on the potential energy curves and spectroscopic properties of the ion. Transition dipole moments and hence radiative lifetimes of several dipole-allowed and spin-forbidden transitions are computed. Transitions such as 44Σ-44Σ-–X4Σ− and 4Π–X4Σ− are predicted to be highly probable, while the spin-forbidden transitions are weak. ⺠Multireference configuration interaction calculations have been carried out on the SnSi+ ion. ⺠Potential energy curves and spectroscopic constants of the ground and low-lying electronic states are computed for the ion. ⺠Effects of the spin–orbit coupling are studied. ⺠Radiative lifetimes of some dipole-allowed and spin-forbidden transitions are estimated.