Affiliation: | 1. National Hellenic Research Foundation , Theoretical and Physical Chemistry Institute , 48, Vas. Constantinou Ave., Athens, 116/35, Greece;2. Department of Experimental Physics , J.A.T.E. University , Domtér 9, Szeged, H-6720, Hungary;3. National Hellenic Research Foundation , Theoretical and Physical Chemistry Institute , 48, Vas. Constantinou Ave., Athens, 116/35, Greece |