1. Institute of Physics, Kazimierz Wielki University in Bydgoszcz, Powstan ́ców Wielkopolskich str., 2, 85090 Bydgoszcz, Poland
2. Faculty of Technical Physics, Poznan University of Technology, Piotrowo Street 3, 60-965 Poznań, Poland
3. Institute for Scintillation Materials, National Academy of Sciences of Ukraine, av. Nauky, 60, 61001 Kharkiv, Ukraine
4. SSI Institute for Single Crystals, National Academy of Sciences of Ukraine, av. Nauky, 60, 61178 Kharkiv, Ukraine
5. Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
6. Institute of Physics, Academy of Science of Czech Republic, Cukrovarnicka str., 10, 16253 Prague, Czech Republic