Temperature dependence of the PbWO4:F,Eu luminescence |
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| Institution: | 1. Synchrotron Radiation Laboratory, Physics Faculty, M.V. Lomonosov Moscow State University, Vorob’evy Gory, 119992 Moscow, Russia;2. Skobeltsyn Institute of Nuclear Physics, M.V. Lomonosov Moscow State University, Vorob’evy Gory, 119992 Moscow, Russia;3. Faculty of Electronics, Ivan Franko National University of Lviv, Dragomanova st. 50, Lviv UA 79005, Ukraine |
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| Abstract: | Luminescence of the PbWO4:F,Eu single crystal was investigated in the temperature region of 10–300 K. Besides two well known “blue” (2.80 eV) and “green” (2.45 eV) luminescence bands an additional band at 2.25 eV was observed in the whole temperature region and was assigned to the WO3F defect centres. Europium dopant evinced as a narrow weak luminescence band at 2.02 eV only at 300 K. Temperature dependence of the excitation spectra was simulated assuming existence of the two defect absorption bands located near the fundamental absorption edge. |
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