We report a reddish orange long-lasting phosphor of KY_(3)F_(10):Sm^(3+)synthesized by a solid-state reaction for applications in x-ray or cathode-ray tubes.The spectrum contains a group of reddish orange emission lin...We report a reddish orange long-lasting phosphor of KY_(3)F_(10):Sm^(3+)synthesized by a solid-state reaction for applications in x-ray or cathode-ray tubes.The spectrum contains a group of reddish orange emission lines originating from^(4)G_(5/2)→^(6)H_(J)transitions of Sm^(3+).The Judd-Ofelt theory is introduced to analyze the optical transitions of the Sm^(3+)ions.Moreover,phosphorescence characteristics are discussed.The energy charging and release processes of the phosphor are measured and the phosphorescence decay time with 10%of initial intensity is about 40.7 seconds.The order of kinetics and the activation energy are obtained according to the thermoluminescence curve.The phosphorescence mechanism is proposed based on structural analysis and thermoluminescence glow curve measurement.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 11104024,50972021,61078061 and 11104023the Natural Science Foundation of Liaoning Province(20092147)+1 种基金Foundation of Education Department of Liaoning Province under Grant No L2010056Fundamental Research Funds for the Central/Kernel Universities under Grant Nos 2011JC037,2011JC036,2011ZD032 and 2011ZD033.
文摘We report a reddish orange long-lasting phosphor of KY_(3)F_(10):Sm^(3+)synthesized by a solid-state reaction for applications in x-ray or cathode-ray tubes.The spectrum contains a group of reddish orange emission lines originating from^(4)G_(5/2)→^(6)H_(J)transitions of Sm^(3+).The Judd-Ofelt theory is introduced to analyze the optical transitions of the Sm^(3+)ions.Moreover,phosphorescence characteristics are discussed.The energy charging and release processes of the phosphor are measured and the phosphorescence decay time with 10%of initial intensity is about 40.7 seconds.The order of kinetics and the activation energy are obtained according to the thermoluminescence curve.The phosphorescence mechanism is proposed based on structural analysis and thermoluminescence glow curve measurement.
