The Low Lying Electronic States of GeO

Abstract

The A 1Π-X 1Σ+ band system in 74Ge16O and 74Ge18O is analyzed and the local perturbations of the A 1Π state are assigned. Four new electronic states are reported, namely the d 3Δ, e 3Σ-, C 1Σ- and D 1Δ states. Vibrational numbering is determined from the isotopic shifts. The vibrational variations of the perturbation matrix elements are shown to be in agreement with single configuration arguments. The electronic spin-orbit parameter a + and the Coriolis parameter b are determined. The molecular constants for the eight lowest electronic states are reported. Semi-empirical and isovalent relationships between spin-orbit and spin-spin constants are also discussed.The equilibrium constants for the A 1Π state and the four perturbing states are in cm-1: State Te ω e Be A 1Π37 763.1648.80.414 32 D 1Δ32 7155910.362 2 C 1Σ- 32 4755910.362 2 e 3Σ- 32 2146000.362 2 d 3Δ1 30 4925970.362 2