0482761 - FZÚ 2018 RIV NL eng J - Článek v odborném periodiku
Tamulaitis, G. - Vaitkevicius, A. - Nargelas, S. - Augulis, R. - Gulbinas, V. - Boháček, Karel - Nikl, Martin - Borisevich, A. - Fedorov, A. - Korjik, M. - Auffray, E.
Subpicosecond luminescence rise time in magnesium codoped GAGG:Ce scintillator.
Nuclear Instruments & Methods in Physics Research Section A. Roč. 870, Oct (2017), s. 25-29. ISSN 0168-9002. E-ISSN 1872-9576
Grant CEP: GA ČR GA16-15569S
GRANT EU: European Commission(XE) 654168 - AIDA-2020
Grant ostatní: COST(XE) TD1401
Institucionální podpora: RVO:68378271
Klíčová slova: scintillator * GAGG garnet crystal * luminescence kinetics * radiation detector
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 1.336, rok: 2017 ; AIS: 0.394, rok: 2017
DOI: https://doi.org/10.1016/j.nima.2017.07.015

The influence of co-doping of Gd3Al2GA3O12:Ce (GAGG:Ce) scintillator with magnesium on the rise time of luminescence response was studied in two GAGG:Ce crystals grown in nominally identical conditions except of Mg co-doping in one of them. Time-resolved photoluminescence spectroscopy and free carrier absorption techniques were exploited. It is evidenced that the Mg co-doping decreases the rise time down to sub-picosecond domain. Meanwhile, the light yield decreases by ∼20%. Thus, the feasibility of exploitation of the fast rise edge in luminescence response for ultrafast timing in scintillation detectors is demonstrated. The role of Mg impurities in facilitating the excitation transfer to radiative recombination centers is discussed
Trvalý link: http://hdl.handle.net/11104/0278139