[1] Ist Nazl Fis Nucl, I-40126 Bologna, Italy
[2] Univ Bologna, Dipartmento Fis, Bologna, Italy
[3] Ist Nazl Fis Nucl, LNS, I-95129 Catania, Italy
[4] Catania Univ, Dipartimento Fis & Astronomia, Catania, Italy
[5] Ist Nazl Fis Nucl, I-20133 Milan, Italy
[6] CNR, Inst Fis Cosm, I-20133 Milan, Italy
[7] Ist Nazl Fis Nucl, Messina, Italy
[8] Univ Messina, Dipartmento Fis, Messina, Italy
[9] Inst Phys & Nucl Engn, Bucharest, Romania
[10] Univ Milan, Dipartimento Fis, Milan, Italy
[11] Silesian Univ, Inst Phys, PL-40007 Katowice, Poland
[12] CNRS, IN2P3, Inst Phys Nucl, Orsay, France
[13] ENSI Caen, LPC, Caen, France
[14] Univ Caen, F-14032 Caen, France
[15] Jagiellonian Univ, M Smoluchowski Inst Phys, Krakow, Poland
[16] Ist Nazl Fis Nucl, I-95129 Catania, Italy
[17] Catania Univ, Dipartimento Fis & Astronomia, Catania, Italy
[18] CNRS, IN2P3, CEA, GANIL, Caen, France
[19] H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland
[20] CNRS, IN2P3, Inst Phys Nucl, Lyon, France
[21] Inst Modern Phys, Lanzhou, Peoples R China
[22] Warsaw Univ, Inst Phys Expt, Warsaw, Poland
[23] Univ Naples Federico II, Ist Nazl Fis Nucl, Naples, Italy
[24] Univ Naples Federico II, Dipartimento Fis, Naples, Italy
[25] Inst Nucl Studies, Otwock, Poland