Ab initio relativistic treatment of the intercombination $a^3Π-X^1Σ^+$ Cameron system of the CO molecule
The intercombination $a^3Π- X^1Σ^+$ Cameron system of carbon monoxide has been computationally studied in the framework of multi-reference Fock space coupled cluster method with the use of generalized relativistic pseudopotential model for the effective introducing the relativity in all-electron correlation treatment. The extremely weak $a^3Π_{Ω=0^+,1} - X^1Σ^+$ transition probabilities and radiative lifetimes of the metastable $a^3Π$ state were calculated and compared with their previous theoretical and experimental counterparts. The impact of a presumable variation of the fine structure constant $α=e^2/\hbar c$ on transition strength of the Cameron system has been numerically evaluated as well.
physics.comp-ph↗