[1] Univ Caen, Inst Sci Mat & Rayonnement, CEA,Ctr Interdisciplinaire Rech Ions Lasers, CNRS,Unite Mixte Rech 6637, F-14050 Caen 4, France
[2] Univ Verona, Dipartimento Sci & Tecnol, I-37134 Verona, Italy
[3] Univ Parma, Dipartimento Chim Gen & Inorgan Chim Analit & Chi, I-43100 Parma, Italy