High-resolution emission bands of the A2Π – X2Π system of SO+

Abstract

The A2Πi → X2Πr visible band system of SO+ has been recorded photographically at high resolution. Molecular constants for the A and X states have been fitted to the measured line positions of the 0–5, 0–6, 1–5, and 1–6 bands. Λ-type doubling was resolved completely for most of the lines of the 2Π1/2 – 2Π1/2 sub-bands, and has led to the first reported values of the splitting constants p′ and p″. All the estimated constants have been merged with constants obtained previously from medium-resolution spectra for other levels of the X2Π ground state. A self-consistent set of constants is reported for ν′ = 0 and 1 and for ν = 4–9, together with revised equilibrium constants.