Citation: Wei CHEN, Mian Zeng SU. FURTHER EVIDENCE FOR FA CENTERS IN BaFCL:Eu²⁺ CRYSTAL[J]. Chinese Chemical Letters, ;1993, 4(9): 817-820. shu

FURTHER EVIDENCE FOR FA CENTERS IN BaFCL:Eu²⁺ CRYSTAL

Wei CHEN ^a ,
Mian Zeng SU ^b

a Department of Materials Physics, Beijing University of Science and Technology, Beijing 100083;
b Department of Chemistry, Peking University, Beijing 100871

Received Date: 7 April 1993

Fund Project: The project is supported by NNSFC grant.

The formation of color centers in BaFCl:Eu²⁺ crystal is studied in more detail and further evidence for FA centers in BaFCl:Eu²⁺ is reported.The creation of color centers in BaFCl:Eu²⁺ may be devided into three stages.Under long time X-irradiation beyond stage 1, the concentration of FA centers depends linearly on the nth (n=1, 2 or 3) power of F center concentration.While under short time X-irradiation within stage 1, the concentration dependence of FA centers on F center is complex.Simple centers are easier to create than complex centers.Possible mechanisms for color centers formation in BaFCl:Eu²⁺ are also proposed and discussed.
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