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23 September 1998 Luminescence of Li2B4O7:Tm in glassy and polycrystalline states
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Investigated is the influence of doping with thulium on the character of solidification and luminescent properties of lithium tetraborate (LBO). It is found that the increase of thulium content favors crystallization of the melt preventing its vitrification. The character of the luminescence spectra of LBO:0.4%Tm3+ glass and LBO:0.5%Tm3+ polycrystal testified that in both cases the emission of Tm3+ ions in the low-symmetry surroundings of the matrix ions takes place under the influence of static electric fields.
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Boris V. Grinyov, Leonid V. Grin', Elena F. Dolzhenkova, Mikhail F. Dubovik, Tatyana I. Korshikova, Tatyana S. Teplitskaya, and Aleksander V. Tolmachyov "Luminescence of Li2B4O7:Tm in glassy and polycrystalline states", Proc. SPIE 3424, Inorganic Optical Materials, (23 September 1998);

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