1. National Centre for Nuclear Research (NCBJ), ul. Andrzeja Sołtana 7, Otwock-Świerk, Poland
2. Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali di Legnaro, Viale dell’Università 2, Legnaro PD, Italy
3. Physikalisch-Technische Bundesanstalt, Bundesallee 100, Braunschweig, Germany
4. Faculty of Physics, University of Warsaw, Pasteura 5, Warszawa, Poland
5. Department of Physics and Astronomy, University of Padova, Via Marzolo 8, Padova, Italy