Growth of GSAG:Ce scintillation crystals by the Bridgman method: influence of Ce concentration and codoping.

Autor: Hovhannesyan, K. L., Derdzyan, M. V., Badalyan, G., Kharatyan, G., Pejchal, J., Nikl, M., Dujardin, C., Petrosyan, A. G.
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Zdroj: CrystEngComm; 9/21/2024, Vol. 26 Issue 35, p4812-4819, 8p
Abstrakt: Single crystals of Ce-doped gadolinium scandium aluminum garnet (Gd3Sc2Al3O12; GSAG) with Ca2+, Mg2+ and Li+ co-dopants were grown by the Bridgman method. Regardless of melt composition, crystals tend to grow close to the congruent composition. Introduction of Ca2+ or Mg2+, as in other Ce-doped garnets, leads to an increase of absorption below 350 nm, which may indicate formation of Ce4+ states, while no effect is seen with Li+ co-doping. High Ce concentration and co-doping accelerate the scintillation rise and decay times; the codopants strongly significantly reduce the afterglow. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index