We have recorded the electronic spectrum of gas-phase AuS at vibrational resolution. The spectrum covers the wavelength region 440–740 nm and involves excitation into four different excited electronic states. Approximately 100 red-degraded bands have been observed and analyzed to determine an accurate set of term energies and vibrational constants for the excited and ground electronic states. The molecules have been made either by laser ablation in a cold molecular beam or by sputtering in a hot hollow cathode source. The ground state is observed to be an inverted 2Π state, in agreement with previous work by others on the photoelectron spectrum of the molecule. The four excited states have been characterized as the a4Σ–, A2Σ+, B2Σ–, and C2Δ states. The electronic configurations from which these states arise will be discussed.

Characterizing the electronic states of gold monosulfide, AuS

251st National Meeting (2016)

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