Luminescence properties of Li6GdB3O9:Ce crystal fibers upon their excitation in the range of 4d → 4f core transitions |
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| Authors: | I N Ogorodnikov I N Sedunova V Yu Ivanov B V Shulgin A V Ishchenko M M Kidibaev T S Koroleva |
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| Institution: | 1176. Ural Federal University, Yekaterinburg, 620002, Russia
2176. Institute of Physical Technological Problems and Materials Science, National Academy of Sciences of the Kyrgyz Republic, Bishkek, 720071, Kyrgyzstan
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| Abstract: | We have investigated UV luminescence with a subnanosecond time resolution of Li6GdB3O9:Ce crystal fibers upon their ultrasoft X-ray selective excitation at 10 and 293 K in the range of 4d → 4f core transitions. We have revealed an intense fast-decaying subnanosecond luminescence component, which is caused by a high local density of electronic excitation and Auger core hole relaxation processes, and modulation of the luminescence excitation spectrum by an absorption band of the 4d–4f photoionization giant resonance in the energy range 135–160 eV. |
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