Luminescence and vacuum ultraviolet excitation spectroscopy of cerium doped Gd3Ga3Al2O12 single crystalline scintillators under synchrotron radiation excitations

• Published in: Results in physics Vol. 16; p. 103002
• Main Authors: Kozlova, Anna P., Kasimova, Valentina M., Buzanov, Oleg A., Chernenko, Kirill, Klementiev, Konstantin, Pankratov, Vladimir
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.03.2020; Elsevier
• Subjects: Atom and Molecular Physics and Optics; Atom- och molekylfysik och optik; Ce3; Fysik; Gd3Ga3Al2O12; GdGaAlO; Luminescence; Natural Sciences; Naturvetenskap; Physical Sciences; Synchrotron radiation; VUV spectroscopy; XANES; Ce3; XANES; VUV spectroscopy; Synchrotron radiation; Gd3Ga3Al2O12; Luminescence
• ISSN: 2211-3797; 2211-3797
• DOI: 10.1016/j.rinp.2020.103002

•VUV – soft X-ray excitation spectra of Ce3+ and Gd3+ emissions in GGAG are obtained.•Multiplications of electronic excitations processes in co-doped GGAG are studied.•The role of co-dopant ions in electronic excitations of GGAG is elucidated.•The correlation between VUV excitation spectra and XANES data is demonstrated. Cerium doped Gd3Ga3Al2O12 (GGAG) single crystals as well as GGAG:Ce single crystals co-doped by divalent (Mg2+, Ca2+), trivalent (Sc3+) or tetravalent (Zr4+, Ti4+) ions have been studied by means of the excitation luminescence spectroscopy in vacuum ultraviolet spectral range. Synchrotron radiation from the undulator beam was utilized for the luminescence excitation in the energy range from 4.5 to 800 eV. The influence of the co-dopant ions on the excitonic transitions as well as on the intrinsic defects in GGAG was revealed examining the luminescence emission and excitation spectra of both Gd3+ and Ce3+ ions in all single crystals studied. Special attention was paid to the analysis of Ce3+ excitation spectra in VUV spectral range (4.5–45 eV) where multiplication of electronic excitation (MEE) processes occur. It was obtained that GGAG:Ce single crystals having different co-dopant ions reveal distinguished efficiency of MEE. The role of intrinsic defects in MEE processes in the co-doped GGAG:Ce single crystals was elucidated.