| 摘 要： | This paper studies photo-,cathodo-and X-ray luminescence of Ce~(3 ) and Dy~(3 )mono-doped LABO_3samples or Ce~(3 ),Dy~(3 ) codoped LaBO_3 samples and the dependence of Ce~(3 ) and Dy~(3 ) luminescent intensi-ties on compositions.The results obtained indicate that Ce~(3 ) can sensitize well the luminescence of Dy~(3 ) un-der UV excitation and quench markedly it under CR and XR excitation.This paper also studies the concen-tration dependence of emission intensity of Dy~(3 ) under the excitation of peak wavelength of 352 nm,con-firming that the mechanism of concentration self-quenching of Dy~(3 ) is a dipole-dipole interaction and themechanism of the energy transfer from Ce~(3 ) to Dy~(3 ) is a resonant transfer in which electric multipoleinteraction plays a leading role.
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