Electron spectra of WO molecule. New electron state 3Π

Abstract

The electron spectrum of the tungsten monooxide molecule is observed in the 550–800 nm region using intracavity laser absorption spectroscopy. The WO molecules are produced in a pulsed electric discharge through the mixture of tungsten hexacarbonyl vapors. The spectrum is recorded using a diffraction spectrometer (resolving power of 240000). The bands in the 16400–15500 cm^–1 region are assigned to the ³Π₀–X³Σ⁺ component of the ³Π₀–X³Σ⁺–³XΣ⁺ electron transition. The rotational analysis of the 0-0 and 1-0 bands is carried out and the rotational constants for the ground X″³Σ and the exited ³Π₀ states are computed: В′ = 0.385738 cm^–1, B″ = 0.415538 cm^–1.