Experimental observation of post-collision interaction and interference effects in resonant double photoionization processes

The combined effects of post-collision interaction in the final state and interference due to the indistinguashibility of the two lectrons have been studied in a selected case of resonant double photoionization of neon. In our coincidence experiments, the photo- and Auger-electron pair was measured when the two electrons have nearly equal energy and are ejected at smal mutual angle. The obtained energy distributions exhibit a strong onterplay of post-collsion intercation and interference effects, in agreement with the theoretical prediction of Sheinerman and Schmidt [J. Phys. B30 (1997) 1677] made on beryllium.