1. Université Bordeaux 1 and CNRS/IN2P3 Centre d'Etudes Nucléares de Bordeaux, Gradignan BP 120, 33175 Gradignan, France
2. Institute of Experimental Physics, University of Warsaw, Hoża 69, 00-689 Warsaw, Poland
3. The Andrzej Sołtan Institute for Nuclear Studies, 05-400 Otwock-Świerk, Poland