A study of Mg2+ ions effect on atoms segregation, defects formation, luminescence and scintillation properties in Ce3+ doped Gd3Al2Ga3O12 single crystals

The Effect of Be Co‐Doping on Luminescence Properties of Gd3Al3Ga2O12:Ce Glass Ceramics

“…The calculated PL decay time values in general are smaller than in Gd 3 Al 2 Ga 3 O 12 :Ce,Mg or Lu 0.8 Gd 2.2 (Al 5‐x Ga x )O 12 :Ce,Mg ( x = 2.6, 3) single crystals (4 – 55 ns). [ 13,39 ] The influence of Be co‐doping is in a good correlation with the EDX mapping showing the incorporation of Be into the ceramic grains (see Figure S1 and S3 Supporting Information).…”

“…The calculated PL decay time values in general are smaller than in Gd 3 Al 2 Ga 3 O 12 :Ce,Mg or Lu 0.8 Gd 2.2 (Al 5-x Ga x )O 12 :Ce,Mg (x ¼ 2.6, 3) single crystals (4-55 ns). [13,39] The influence of Be co-doping is in a good correlation with the EDX mapping showing the incorporation of Be into the ceramic grains (see Figure S1 and S3 Supporting Information). To study the influence of the Be doping on light yield, the RL spectra of the samples C1 and B1,B2 (Table 1) were measured along with the spectrum of BGO (see Figure 3A).…”

“…[40] The position of the Ce 3þ RL band is changing from 2.34 eV in the Gd 3 Al 2 Ga 3 O 12 to 2.25 eV in the Gd 3 Al 3 Ga 2 O 12 . [13,14] From this follows that the garnet composition and the type of the material influence the luminescence and scintillation properties. It cannot be excluded that after the optimization of the initial composition the scintillation properties of the Gd 3 Al 3 Ga 2 O 12 glass-ceramics will be improved.…”

“…[ 8–11 ] The Gd 3 Al 2 Ga 3 O 12 :Ce garnet is one of the most studied recently due to its high potential for demanding applications as a scintillator. [ 12 ] In this material, Ce 3+ emission band has the maximum at 550 nm (2.25 eV) [ 13 ] whereas in the Gd 3 Al 3 Ga 2 O 12 :Ce garnet, the Ce 3+ emission is observed at 529 nm (2.34 eV). [ 14 ] Moreover, the difference is even more prominent in the scintillation decay time.…”

“…[ 14 ] Moreover, the difference is even more prominent in the scintillation decay time. Specifically, the fast decay component is 55 ns in the Gd 3 Al 2 Ga 3 O 12 :Ce [ 13 ] while in the Gd 3 Al 3 Ga 2 O 12 :Ce it is about 80 ns. [ 14 ] The light yield of the Gd 3 Al 2 Ga 3 O 12 :Ce is 56 500 ph MeV −1 .…”