1. M. V. Lomonosov Moscow State University, Department of Physics, Leninskie Gory 1/2, Moscow 119991, Russia
2. A. M. Prokhorov General Physics Institute, RAS, Vavilova Street 38, Moscow 119991, RussiacNational Research Nuclear University MEPhI, Kashirskoe Avenue 31, Moscow 115409, Russia
3. M. V. Lomonosov Moscow State University, D. V. Skobeltsyn Institute of Nuclear Physics, Leninskie Gory 1/2, Moscow 119991, Russia
4. Abo Akademi University, Laboratory for Physical Chemistry, Porthansgatan 3, 20500 Turku, Finland
5. Adámas Nanotechnologies, Inc., Raleigh, North Carolina 27617, United States