Gd^(3+) content optimization for mastering high light yield and fast GdxAl_(2)Ga_(3)O_(12):Ce^(3+) scintillation ceramics  

作　　者：Vasili Retivov Valery Dubov Daria Kuznetsova Artem Ismagulov Mikhail Korzhik 

机构地区：[1]NRC"Kurchatov Institute",1Kurchatov Sq,123098,Moscow,Russia [2]NRC"Kurchatov Institute",IREA,3 Bogorodsiy val,107076,Moscow,Russia [3]Institute for Nuclear Problems of Belarus State University,11 Bobruiskaya,220030,Minsk,Belarus

出　　处：《Journal of Rare Earths》2023年第12期1911-1918,I0004,共9页稀土学报（英文版）

基　　金：Project supported by the NRC"Kurchatov Institute"(No.2834 dated 09.11.2021);the Russian Federation represented by the Ministry of Education and Science of Russia (Agreement No.075-11-2021-070 dated 19.08.2021)。

摘　　要：Tailoring of the composition of the scintillation ceramics Gd_(x)Ce_(0.03)Al_(2)Ga_(3)O_(12)(x=2.89-3.07) heavily doped with Ce was performed.The co-precipitation is found to be quite a useful method to provide a purpo seful deviation of Gd content from the stoichio metric ratio in powders for their further compacting and sintering in the air.The effect of the composition variations on microstructure,phase composition,luminescent and scintillation characteristics is demonstrated.It is shown that Gd content below the stoichiometric composition leads to increasing the grain size but,quenching of the photoluminescence and the scintillation,whereas excess Gd leads to higher luminosity;the maximum value is obtained for the composition with an excess of Gd ~2%.Ceramics possess a light yield of -50000 ph/MeV,effective scintillation kinetics of 50 ns,and is a good candidate for application in a new generation of scanners utilizing pulsed X-ray sources.

关 键 词：Scintillation ceramics Complexgarnet COMPOSITION STOICHIOMETRY Light yield Scintillation kinetics 

分 类 号：TQ174.1[化学工程—陶瓷工业]