Lighting up materials with X-rays: advanced X-ray excited optical luminescence probe at the BM08-XAFS/XRF beamline, SESAME

Khan, L.U.; Hasoneh, A.R.; Ahmad, A.; Dokuyucu, C.; Mohammad, A.; Aldrabee, A.; Iqbal, M.; Al Omari, F.; Al Natsheh, A.; Rehman, A.U.; Shehab, M.; AlZubi, M.; Mohammad, H.; Khan, Z.U.; Canisares, F.S.M.; Harfouche, M.; Figueroa, S.J.A.; Hameed, F.; Lausi, A.; Brito, H.F.

doi:10.1107/S2052252526007815

Figure 8
XEOL spectral mapping of Gd₂O₂S:Tb phosphor recorded under monochromatic X-ray excitation at 9000 eV. (a) Original spectral stack collected across the scanned area and (b) 2D spectral map constructed by integrating the selected ROI in the emission spectrum corresponding to the Tb³⁺ ⁵D₄ → ⁷F₅ transition (∼545 nm), revealing the spatial distribution of the green-emitting Tb³⁺ centers in the sample. (c) XEOL spectrum with the defined ROI of the ⁵D₄ → ⁷F₅ transition that is used for constructing 2D mapping. (d) Digital photograph of the Gd₂O₂S:Tb-containing sample.

IUCrJ

Volume 13| Part 6| November 2026|

ISSN: 2052-2525

https://doi.org/10.1107/S2052252526007815

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