Abstract
The authors present the first simultaneous studies of fragment ion production and electron emission of a molecule following deep core-level excitation. Using synchrotron radiation they tune in to various absorption resonances and correlate certain electron-hole states in the decay of the x-ray excitation with the appearance of specific ionic fragments. For ${\mathrm{N}}_{2}$ specifically they observe a 1:1 correspondence between single valence hole states and undissociated ${\mathrm{N}}_{2}^{+}$ after N $1s\ensuremath{\rightarrow}{\ensuremath{\pi}}^{*}$ excitation and relate the production of ${\mathrm{N}}^{++}$ ions to the generation of holes in the $2{\ensuremath{\sigma}}_{\mathrm{u}}$ orbital.
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