Valence photoionization of the N2 molecule in the region of the N 1s-> Rydberg excitations

The intensities of the X and A valence photoelectron lines of N2 have been found to display Fano line shapes as a function of photon energy around the N 1s-> Rydberg excitations. The vibrational intensity distributions of these photoelectron lines change at the N 1s->3s? and 3p? resonances. These effects indicate interference between direct and resonant photoionization channels. Our numerical simulations reproduce quite well the experimental results.