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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Emission spectra at different tilt angles, with the sharp emission peak of Gd3+ at 314 nm, as well as a wide Cherenkov emission spectrum with a maximum intensity at 42.5°.