1. Department of Physics of Kazimierz Wielki University in Bydgoszcz, 85090 Bydgoszcz, Poland
2. Department of Mechatronics, Kazimierz Wielki University in Bydgoszcz, 85074 Bydgoszcz, Poland
3. Institute of Physics, Academy of Sciences of Czech Republic, 16200 Prague, Czech Republic
4. Institute for Materials Research, Tohoku University, 980-8577 Sendai, Japan
5. Institute of Single Crystals, National Academy of Sciences of Ukraine, 61001 Kharkiv, Ukraine
6. Institute for Scintillation Materials, National Academy of Sciences of Ukraine, 61001 Kharkiv, Ukraine
7. Medical Physics Department of Oncology Center, Bydgoszcz, 85796 Bydgoszcz, Poland
8. Oncology and Brachytherapy Department of Collegium Medicum of Nicolaus Copernicus University, 85067 Bydgoszcz, Poland