Ultrafast core-to-core luminescence in BaF2 - LaF3 single crystals

Ultrafast core-to-core luminescence in BaF2 - LaF3 single crystals

Abstract This study investigates the mechanisms underlying the ultrafast cross-luminescence observed in BaF2 crystals doped with LaF3. We identified an ultrafast luminescent component with a decay time of approximately 150 ps, which emerges under excitation energies exceeding 24 eV as a novel radiat...

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Main Authors: Roman Shendrik, Evgeny Radzhabov, Alexandra Myasnikova, Viktorija Pankratova, Anatolijs Šarakovskis, Alexander Nepomnyashchikh, Alexander Bogdanov, Veronika Gavrilenko, Ekaterina Kaneva, Dmitry Sofich, Tatiana Garmysheva, Vladimir Pankratov
Format: Article
Language:English
Published: Nature Portfolio 2025-07-01
Series:Scientific Reports
Online Access:https://doi.org/10.1038/s41598-025-11505-w
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Summary:Abstract This study investigates the mechanisms underlying the ultrafast cross-luminescence observed in BaF2 crystals doped with LaF3. We identified an ultrafast luminescent component with a decay time of approximately 150 ps, which emerges under excitation energies exceeding 24 eV as a novel radiative recombination process between electrons in the 5p core band of Ba2+ and holes in the 5p core band of La3+. Ab initio calculations supported this hypothesis, showing that the energy levels of the core bands facilitate such transitions. The findings indicated that BaF2-LaF3 scintillators hold significant promise for the detection of ultrafast processes in high-energy physics and medical applications.
ISSN:2045-2322

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