1. Institute of Applied Physics of the Russian Academy of Sciences, 46 Ulyanov str., 603950 Nizhny Novgorod, Russia
2. Lobachevsky State University of Nizhny Novgorod, 23 Gagarin ave., 603950 Nizhny Novgorod, Russia
3. Budker Institute of Nuclear Physics, 11 Lavrentieva ave., 630090 Novosibirsk, Russia