Electronic state-lifetime interference observed at Ne K inter-resonance excitation

Electronic decay spectra of Ne, excited at the 1s threshold have been measured. Final states of the 2p−2n′p configuration are reached via 1s−1np intermediate states. Appreciable intensity from spectator shake transitions (n ≠ n′) is found and the predictions of a simple intensity model are evaluated. The model reproduces the experimental results at on-resonance excitation. At inter-resonance excitation an apparent excitation energy dependence of the shake probability is accounted for by electronic state-lifetime interference theory.