Electronic decay of vibrationally selected core excited states in molecular N2

We have measured and analyzed the vibrational fine structure of the electronic participator decay of the 1s−11πg state in gas-phase N2. The monochromator resolution allowed us to limit the vibrational excitations in the excited state so that unequivocally assignable vibrational fine structure in the decay spectra could be resolved. The excitation-emission process is shown to be well-described within the two-step Franck–Condon model, and the data represents individual decay of vibrationally selected core excited states.