We report the observation of the unusually weak decay of the N 1s --> pi* c
ore-excited N-2 molecule to the (B) over tilde (2)Sigma(u)(+) final state o
f N-2(+), which is only detectable in an experiment with high sensitivity.
The resonant Auger spectra exhibit an unexpected dependence on the selected
vibrational level of the intermediate state. Theoretical calculations show
that the interference between direct and resonant photoemission as well as
a strong geometry dependence of the decay probability on the bond distance
give rise to the observed features.