1. The Lebedev Physical Institute of the Russian Academy of Sciences, Moscow 119991, Russia
2. Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
3. Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia
4. Novosibirsk State University, Novosibirsk 630090, Russia
5. National Research Nuclear University MEPhI, Kashirskoye Highway 31, Moscow 115409, Russia