Electron paramagnetic resonance study of exchange coupled Ce3+ ions in Lu2SiO5 single crystal scintillator |
| |
| Institution: | 1. Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, Warsaw 02-668, Poland;2. Lviv Polytechnic National University, Bandera 12, Lviv 79646, Ukraine;3. National Research Center for Radiation Medicine, Melnykova 53, Kyiv 04050, Ukraine;4. Department of Radiation Oncology, Sheba Medical Center, Tel HaShomer 52621, Israel;5. Department of Radiation Oncology, Thomas Jefferson University, 111 South 11th Street, Philadelphia, PA 19107, USA;6. Institute of Physics, University of Bydgoszcz, Weyssenhoffa 11, Bydgoszcz 85-072, Poland;1. Key Laboratory of Transparent Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 201899, China;2. University of Chinese Academy of Sciences, Beijing, 100049, China;3. Department of Physics, Shanghai Normal University, Shanghai, 200234, China;5. Institute of Physics, Czech Academy of Sciences, 16200, Prague, Czech Republic;1. Peter the Great Saint-Petersburg Рolytechnic University, Polytekhnicheskaya 29, 195251 St.Petersburg, Russia;2. Research and Technological Institute of Optical Materials all-Russia Scientific Center “S.I.Vavilov State Optical Institute”, Babushkina 36, St.Petersburg 192171, Russia;3. Philips Research Eindhoven, High Tech Campus 34, 5656 AE Eindhoven, The Netherlands;1. College of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing, PR China;2. Department of Chemistry, Dartmouth College, Hanover, NH, 03755, USA;1. Institute of Physics, Kazimierz Wielki University in Bydgoszcz, 85-064 Bydgoszcz, Poland;2. Electronics Department, Ivan Franko National University of Lviv, 79000 Lviv, Ukraine;3. Institute of Nuclear Physics, Polish AS, 31-342 Krakow, Poland;4. Institute of Physics, Jan Dlugosz University, 42-200 Czestochowa, Poland;5. Institute for Scintillation Materials NAS of Ukraine, 61001 Kharkiv, Ukraine |
| |
| Abstract: | The Ce3+ ions incorporation inside lutetium oxyorthosilicate (Lu2SiO5) single crystals was studied by electron paramagnetic resonance. Already known Ce1 and Ce2 centers originating from the lattice peculiarity allowing two lutetium sites coordinated by different number of the oxygen ions were detected. Remarkably, for the Ce2 center, the determined g2 tensor is asymmetric and could not be diagonalized as compared to the Ce1 center, for which the three principal values and corresponding axes orientation have been determined and reported previously. Besides, the much weaker resonance lines found in spectra close to those coming from the Ce1 and Ce2, and following them under crystal rotation with respect to the direction of an external magnetic field, have been revealed as well. They were classified as doublets produced by the exchange coupled Ce3+ ions, creating the Ce1–Ce1, Ce2–Ce2 and Ce1–Ce2-like dimers. The corresponding spin–spin coupling constants were estimated. They are in the range 0.04–0.4 cm−1. The Ce1, Ce2 and total dimer centers populations were calculated as 89%, 4.5% and 6.5%, comparing integral intensities of corresponding resonance lines. |
| |
| Keywords: | Electron paramagnetic resonance Scintillators Lutetium oxyorthosilicate Exchange coupled ions Cerium ions |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
