1. Research Institute for Nuclear Problems of Belarusian State University; Bobruiskaya Str. 11 Minsk 220030 Belarus
2. National Research Tomsk State University; Lenina Avenue 36 Tomsk 634050 Russia
3. Research Institute for Physical-Chemical Problems of Belarusian State University; Leningradskaya Str. 14 Minsk 220030 Belarus
4. Vilnius University (VU); Universiteto St. 3 01513 Vilnius Lithuania
5. INFN-Laboratori Nazionali di Frascati; Via E. Fermi 40 00044 Frascati Italy