Luminescence and scintillation properties of Gd3Sc2(Al3-xGax)O12:Ce (x = 1, 2, 3) garnet crystals

Composition-Engineered GSAG Garnet: Single-Crystal Host for Fast Scintillators

“…The RL spectrum of the undoped sample (Figure ) shows the 4f-4f lines of Gd 3+ at 275 and 312 nm starting from 6 I 7/2 and 6 P 7/2 , respectively, 4f-4f ( 5 D 3 – 7 F 6 ) line of Tb 3+ trace impurity at 381 nm, and a broadband with a maximum around 780 nm, which is most probably due to a defect, possibly Fe 3+ impurity. , The GSAG:Ce0.1% sample shows the expected 5d 1 –4f broad emission of Ce 3+ with a maximum at 550 nm (long wavelength shifted by about 20 nm compared to an analogous composition, where Sc is replaced by Ga in GAGG:Ce). In the Pr-doped sample, the spectrum is dominated by narrow emissions due to the 4f-4f transitions starting from 3 P 0 and 1 D 2 levels with maxima at 486 and 608 nm, respectively.…”

“…The participation of the Sc 3d state in the formation of the bottom of the conduction band (CB) was also observed. The second article 40 investigated the luminescence and scintillation characteristics of the Ce-doped Gd 3 Sc 2 (Al 3−x Ga x )O 12 with x = (1, 2, 3). The results showed that with decreasing contents of Ga, the 5d 1 level of Ce 3+ shifts to a lower energy due to the increase of the crystal field strength around Ce +3 while the bottom of the CB shifts upward.…”

Development and prospects of garnet ceramic scintillators: A review

“…Lu 3+ could be replaced by many rare-earth ions to achieve a variety of luminescence characteristics [137][138][139]. In the Lu-based garnets, Y 3+ and Gd 3+ of a high concentration can be incorporated [140,141], and the Al 3+ lattice site could be replaced by ions like Ga 3+ and Sc 3+ [77,[142][143][144].…”

Ce concentration dependence of optical and scintillation properties on Ce-doped La2Si2O7 crystal

“…13) At present, the mission to find the perfect materials for scintillators for each specific tool is still ongoing, and the improvement of scintillation detector performance is largely dependent on the improvement of referred scintillator properties. 14) The domain of materials for scintillator use is very large, and includes plastic, 15) glass, [16][17][18] transparent ceramic, 19,20) single crystal, 21,22) or even organic-inorganic perovskite compound. 23) Recently, rare-earth-doped single crystals have become more interesting for novel scintillator research due to their good scintillation properties, and in particular, pyrosilicate group materials have attracted much attention.…”