Investigation of Luminescence Processes in YAG Single Crystals Irradiated by 50 MeV Electron Beam
| Autor: | Harutyunyan, V. V., Aleksanyan, E. M., Baghdasaryan, V. C., Kostanyan, P. B., Bondarenko, G., Kirm, Marco, Vielhauer, Sebastian |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Armenian journal of physics 12(4), 316-324 (2019). doi:10.3204/PUBDB-2020-04335 |
| DOI: | 10.3204/pubdb-2020-04335 |
| Popis: | Armenian journal of physics 12(4), 316 - 324 (2019). Absorption, emission and excitation spectra of 50 MeV electron beam irradiated and as-grown YAG single crystals were studied and compared in the 10-300 K temperature range using time-resolved luminescence spectroscopy under UV/VUV/XUV excitation by synchrotron radiation and cathodoluminescence. The emission spectra consist of intrinsic (excitonic) and defect related non-elementary bands in the VIS/UV range. It is shown that fast electrons create stable F and F$^+$ color centers with characteristic emission and absorption bands in the visible/UV range. Induced absorption caused from these defects starts at 4.2 $eV.$ Energy transfer from host to color centers is not efficient process. |
| Databáze: | OpenAIRE |
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