EXCITATION-FUNCTION MEASUREMENTS OF THE DISSOCIATIVE PHOTOIONIZATION EXCITATION OF N-2

The excitation function of the dissociative photoionization excitation (DIE) of N-2 has been measured with the detection technique of coinci dence between photoion and fluorescence-photon using extreme-uv synchr otron radiation (SR) as an excitation source in the energy region of 3 5 - 65 eV and the detection direction parallel and perpendicular to th e polarization vector of SR. The coincidence spectra obtained in this energy region show at least two qualitatively different structures ori ginating from two different DIE processes. The major components of the DIE in the present energy region is ascribed to the dissociation of t he 2 sigma(g)(-1 2)Sigma(g)(+) state which is strongly coupled with co rrelation states in the (2) Sigma(g)(+) symmetry.