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The dispersed laser-induced fluorescence spectrum of gas-phase at 308 nm

We have recorded the dispersed laser-induced fluorescence spectrum of gas-phase ablated from a rotating copper cylinder by 308 nm radiation from a XeCl excimer laser. At vibrational energies below the spectrum consists of three progressions of transitions to the electronic ground state ending on the odd vibrational levels of the lowest frequency mode, with the lowest and modes as additional origins or on the vibrational levels of the third mode with two quanta of the lowest mode and the combination as the additional origins. At higher vibrational energies, the observed bands become more complex and have yet to be analysed.