1. Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna 141980, Russia
2. Faculty of Physics, Taras Shevchenko National University of Kyiv, Kyiv 03022, Ukraine
3. Ioffe Institute, St. Petersburg 194021, Russia
4. Neutron Physics Department, Nuclear Physics Institute, ASCR, v.v.i., Řež 25068, Czech Republic
5. Neutron Spectroscopy Department, Wigner Research Centre for Physics, Budapest 1525, Hungary
6. Helmholtz-Zentrum Geesthacht, Centre for Materials and Coastal Research, Geesthacht 21502, Germany