Evidence against atomiclike resonant Auger decay inN2doubly excited core states by high-resolution experiments (original) (raw)

Resonant Auger spectra following the decay of doubly excited core states in N 2 in the range 409-411 eV have previously been assigned to ''atomic'' lines indicating ultrafast dissociation. Using high-resolution synchrotron radiation electron spectroscopy from the MAX II facility in Sweden we have remeasured the resonant Auger spectrum of N 2 in the vicinity of the N 1s threshold. Contrary to earlier studies, we find vibrational progressions that can be associated with the final C 2 ⌺ u ϩ and 2 2 ⌸ g states in N 2 ϩ. We conclude that the decay leads entirely to molecular final states.