Autoionisation of superexcited states in N-2 to the N2+B state

• Vibrationally resolved N-2(+) (B-X) (1-2) and (0-1) emission bands were recorded after photoexcitation of N-2 in the 20-46 eV energy range. The branching ratio between these transitions reveals strong non-Franck-Condon effects. Ab initio calculations using a configuration interaction method based on Kohn-Sham orbitals indicate that the autoionisation of certain superexcited states is responsible for some structures present in the branching ratio curve.

Nyckelord

doubly-excited states

cross-sections

photoionization

distributions

excitation

resonances

continuum

nitrogen

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