1. Radiophysics and Electronics Department, Belarusian State University, Nezavisimosty Ave. 4, 220030 Minsk, Belarus
2. Center of Nanoelectronics and Novel Materials, Belarusian State University of Informatics and Radioelectronics, P.Brovka 6, 220013 Minsk, Belarus
3. Laboratory of Nuclear Reactions, Joint Institute of Nuclear Research, 141980 Dubna, Russia