Radiative transition probabilities of CO2+.

Radiative transition probabilities (Einstein A coefficients), Franck-Condon factors, and radiative lifetimes have been determined for the X³Π, ³Σ^-, a¹Σ⁺, ¹Π, c¹ Δ, and A³Σ⁺ states of the CO²⁺ dication using ab initio potential energy, spin-orbit coupling, electric dipole and electronic transition moment functions, and the standard complex-scaling method. The calculated radiative lifetimes of the upper electronic states of the spin-allowed A³Σ⁺–X³Π and b¹Π–a¹Σ⁺ transitions are generally longer than their predissociating lifetimes, explaining thus the failure of the attempts made so far to observe CO²⁺ in the optical spectral region in a convincing fashion. © 2007 Wiley Periodicals, Inc. Int J Quantum Chem, 2007 [ABSTRACT FROM AUTHOR]