1. Faculty
of Physics, St. Petersburg State University, Petrodvorets, 194508 St. Petersburg, Russia
2. Ioffe Physical Technical Institute, Polytekhnicheskaya 26, 194021 St. Petersburg, Russia
3. Frank
Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia
4. Laboratoire
de Spectrochimie Infrarouge et Raman, UMR 8516 CNRS − Université de Lille, Sciences et Technologies, 59655 Villeneuve
d’Ascq, France
5. Institut
de Chimie et des Matériaux Paris Est, ICMPE/GESMAT, UMR 7182 CNRS−Université Paris Est-Créteil, 2 rue Henri Dunant, 94320 Thiais, France
6. Kirensky Institute of Physics, Akademgorodok, 660036 Krasnoyarsk, Russia