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《CHINESE JOURNAL OF LUMINESCENCE》 1998-03
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Ba 2+ INFLUNCENCE TO THE RADIATION PROPERTIES OF Eu 2+ HALOPHOSPHATES

Shu Rong a,b) Zhou Yingxue b) Ji Bingzheng c) Zhang Xinyi b) a) (Laboratory of Excited State Proceses, Chinese Academy of Sciences, Changchun 130021) b) (National Synchrotron Radiation Laboratory of USTC, Hefe  
The Eu 2+ halophosphates are studied in the time resolved station(U10B) of the National Synchrotron Radiation Lab. The (Ca, Sr, Ba) 5(PO 4) 3Cl∶ Eu 2+ and (Ca, Sr) 5(PO 4) 3Cl∶Eu 2+ samples are studied on the irradiation properties and the reflection spectra. Excited by the 185nm, the decrease of the emission intensity of (Ca, Sr, Ba) 5(PO 4) 3Cl∶Eu 2+ is not observed in 60 minutes; on the other hand, the emission intensity of (Ca, Sr) 5(PO 4) 3Cl∶Eu 2+ is observed to have a stronger decrease in 15 minutes. According to the reflection spectra of the two samples(from 100nm to 400nm), there is a large difference on 185nm between two samples. At the same time, in the absorption spectra got by the K K relation, the absorption efficiency of two samples are different. We think: when the Ba 2+ is added into the sample, the crystal symmetry is changed, then the (O) energy level changed. The 185nm excitation efficiency of the electron from(O) center decreased. So it can resist the 185nm radiation.
【Fund】: 国家自然科学基金
【CateGory Index】: O482.31,O434.2
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