[1] Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia
[2] Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Russia
[3] Natl Res Nucl Univ MEPhI, Moscow 115409, Russia
[4] Dukhov Res Inst Automat, Moscow 101000, Russia
[5] Russian Acad Sci, Nesmeyanov Inst Organoelement Cpds, Moscow 119991, Russia