Time-resolved luminescence and excitation spectroscopy of Co-doped Gd3Ga3Al2O12 scintillating crystals

Abstract Cerium doped Gd3Ga3Al2O12 (GGAG) single crystals as well as GGAG:Ce single crystals co-doped by divalent (Mg2+, Ca2+) and tetravalent (Zr4+, Ti4+) ions have been studied by means of time-resolved luminescence as well as the excitation luminescence spectroscopy in vacuum ultraviolet (VUV) an...

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Autores principales:	Viktorija Pankratova, Anna P. Kozlova, Oleg A. Buzanov, Kirill Chernenko, Roman Shendrik, Anatolijs Šarakovskis, Vladimir Pankratov
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0afa536fa6994875ac6c2bc14b8d9c77
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spelling	oai:doaj.org-article:0afa536fa6994875ac6c2bc14b8d9c772021-12-02T12:33:45ZTime-resolved luminescence and excitation spectroscopy of Co-doped Gd3Ga3Al2O12 scintillating crystals10.1038/s41598-020-77451-x2045-2322https://doaj.org/article/0afa536fa6994875ac6c2bc14b8d9c772020-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-77451-xhttps://doaj.org/toc/2045-2322Abstract Cerium doped Gd3Ga3Al2O12 (GGAG) single crystals as well as GGAG:Ce single crystals co-doped by divalent (Mg2+, Ca2+) and tetravalent (Zr4+, Ti4+) ions have been studied by means of time-resolved luminescence as well as the excitation luminescence spectroscopy in vacuum ultraviolet (VUV) and soft X-ray (XUV) spectral range. Tunable laser excitation was applied for time-resolved experiments in order to obtain luminescence decay curves under excitations in Ce3+, Gd3+ and excitonic absorption bands. The influence of the co-dopant ions on the Ce3+ luminescence decay kinetics is elucidated. The fastest luminescence decay was observed for the Mg2+ co-doped crystals under any excitation below bandgap energy indicating the perturbation of the 5d states of Ce3+ by Mg2+ ions. Synchrotron radiation was utilized for the luminescence excitation in the energy range from 4.5 to 800 eV. Special attention was paid to the analysis of Ce3+ excitation spectra in VUV and XUV spectral range where multiplication of electronic excitation (MEE) processes occur. Our results demonstrated that GGAG:Ce single crystals co-doped by Mg2+ ions as well as the GGAG:Ce crystal annealed in vacuum reveal the most efficient excitation of Ce3+ emission in VUV-XUV excitation range. The role of intrinsic defects in MEE processes in the co-doped as well as in the annealed GGAG:Ce single crystals is discussed.Viktorija PankratovaAnna P. KozlovaOleg A. BuzanovKirill ChernenkoRoman ShendrikAnatolijs ŠarakovskisVladimir PankratovNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-11 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Viktorija Pankratova Anna P. Kozlova Oleg A. Buzanov Kirill Chernenko Roman Shendrik Anatolijs Šarakovskis Vladimir Pankratov Time-resolved luminescence and excitation spectroscopy of Co-doped Gd3Ga3Al2O12 scintillating crystals
description	Abstract Cerium doped Gd3Ga3Al2O12 (GGAG) single crystals as well as GGAG:Ce single crystals co-doped by divalent (Mg2+, Ca2+) and tetravalent (Zr4+, Ti4+) ions have been studied by means of time-resolved luminescence as well as the excitation luminescence spectroscopy in vacuum ultraviolet (VUV) and soft X-ray (XUV) spectral range. Tunable laser excitation was applied for time-resolved experiments in order to obtain luminescence decay curves under excitations in Ce3+, Gd3+ and excitonic absorption bands. The influence of the co-dopant ions on the Ce3+ luminescence decay kinetics is elucidated. The fastest luminescence decay was observed for the Mg2+ co-doped crystals under any excitation below bandgap energy indicating the perturbation of the 5d states of Ce3+ by Mg2+ ions. Synchrotron radiation was utilized for the luminescence excitation in the energy range from 4.5 to 800 eV. Special attention was paid to the analysis of Ce3+ excitation spectra in VUV and XUV spectral range where multiplication of electronic excitation (MEE) processes occur. Our results demonstrated that GGAG:Ce single crystals co-doped by Mg2+ ions as well as the GGAG:Ce crystal annealed in vacuum reveal the most efficient excitation of Ce3+ emission in VUV-XUV excitation range. The role of intrinsic defects in MEE processes in the co-doped as well as in the annealed GGAG:Ce single crystals is discussed.
format	article
author	Viktorija Pankratova Anna P. Kozlova Oleg A. Buzanov Kirill Chernenko Roman Shendrik Anatolijs Šarakovskis Vladimir Pankratov
author_facet	Viktorija Pankratova Anna P. Kozlova Oleg A. Buzanov Kirill Chernenko Roman Shendrik Anatolijs Šarakovskis Vladimir Pankratov
author_sort	Viktorija Pankratova
title	Time-resolved luminescence and excitation spectroscopy of Co-doped Gd3Ga3Al2O12 scintillating crystals
title_short	Time-resolved luminescence and excitation spectroscopy of Co-doped Gd3Ga3Al2O12 scintillating crystals
title_full	Time-resolved luminescence and excitation spectroscopy of Co-doped Gd3Ga3Al2O12 scintillating crystals
title_fullStr	Time-resolved luminescence and excitation spectroscopy of Co-doped Gd3Ga3Al2O12 scintillating crystals
title_full_unstemmed	Time-resolved luminescence and excitation spectroscopy of Co-doped Gd3Ga3Al2O12 scintillating crystals
title_sort	time-resolved luminescence and excitation spectroscopy of co-doped gd3ga3al2o12 scintillating crystals
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/0afa536fa6994875ac6c2bc14b8d9c77
work_keys_str_mv	AT viktorijapankratova timeresolvedluminescenceandexcitationspectroscopyofcodopedgd3ga3al2o12scintillatingcrystals AT annapkozlova timeresolvedluminescenceandexcitationspectroscopyofcodopedgd3ga3al2o12scintillatingcrystals AT olegabuzanov timeresolvedluminescenceandexcitationspectroscopyofcodopedgd3ga3al2o12scintillatingcrystals AT kirillchernenko timeresolvedluminescenceandexcitationspectroscopyofcodopedgd3ga3al2o12scintillatingcrystals AT romanshendrik timeresolvedluminescenceandexcitationspectroscopyofcodopedgd3ga3al2o12scintillatingcrystals AT anatolijssarakovskis timeresolvedluminescenceandexcitationspectroscopyofcodopedgd3ga3al2o12scintillatingcrystals AT vladimirpankratov timeresolvedluminescenceandexcitationspectroscopyofcodopedgd3ga3al2o12scintillatingcrystals
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Time-resolved luminescence and excitation spectroscopy of Co-doped Gd3Ga3Al2O12 scintillating crystals

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