1. Department of Radiophysics; Vilnius University; Sauletekio 9 10022 Vilnius Lithuania
2. Research Institute of Nuclear Problems of Belarusian State University; Bobruiskaya str. 11 220030 Minsk Belarus
3. Center for Physical Sciences and Technology; Savanoriu ave. 231 02300 Vilnius Lithuania
4. Frascati National Laboratory; National Institute of Nuclear Physics; via E. Fermi 40 00044 Frascati Italy
5. IJL-UMR Université de Lorraine; CNRS 7198, ENSTIB; 27 rue Philippe Séguin, CS 60036 88026 Épinal Cedex France