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Citation: Shi Chunshan, Ye Zeren, Liu Zugang. THE f→f TRANSITION EMISSION OF Eu²⁺ ION IN SYSTEM BaF_2-xREF₃[J]. Chinese Journal of Applied Chemistry, ;1985, 2(3): 23-28. shu

THE f→f TRANSITION EMISSION OF Eu²⁺ ION IN SYSTEM BaF_2-xREF₃

1.
Changchun Institute of Applied Chemistry, Academia Sinica
2.

Received Date: 11 June 1984
Available Online: 15 February 1985

In this paper the narrow line emision of f→f transition for Eu²⁺ ion in the system BaF₂-xREF₃ (RE:rare earths) is reported. When RE=Lu,x=1(at temperature T=300K);RE=Y,x=2(T=300K)‘RE=Sc,x=2(T=77K);RE=La or Gd(T=77K) the narrow line emission was found to be dependent on the temperature (T) and the molar ratio (x) bet ween cations in flouride matrix and the emission became more easier according the order of La, Gd, Sc, Y and Lu. No narrow line emission for Eu²⁺ ion in BaF₂-xREF₃ (Ln=lanthanide ions except Pm) was observed, irrespective of whatever molar ratio or temperature was used in the experiments.The narrow line emission (f→f) has been ascribed to the weak crystal field at the site of the Eu²⁺ ion in fluorides.
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THE f→f TRANSITION EMISSION OF Eu²⁺ ION IN SYSTEM BaF_2-xREF₃