%0 Journal Article
%T Gd3+-sensitized Tb3+-doped Scintillating Silicate Glasses
%A WANG Sheng
%A QIAN Qi
%A ZHANG Qin-Yuan
%A YANG Zhong-Min
%A JIANG Zhong-Hong
%J 无机材料学报
%D 2009
%I Science Press
%R 10.3724/sp.j.1077.2009.00773
%X Gd3+-sensitized Tb3+-doped scintillating silicate glasses with Gd2O3 and Tb2O3 concentrations up to 45wt% were prepared. Effects of different Gd2O3 and Tb2O3 concentrations on the density, refractive index and luminescence properties under UV and X-ray excitations were investigated and the energy transfer mechanisms between Gd3+ and Tb3+ analyzed and discussed. The results show that, with the increasing concentrations of Tb3+ and Gd3+, a monotonic increase in the energy transfer efficiencies from Gd3+ |SUP>6P7/2 to Tb3+ |SUP>5H7 is observed followed by enhanced emissions centered at 620, 583, 541 and 496nm under 273nm UV excitation. However, with X-ray excitation, the incorporation of a large amount of Tb3+ weakens the luminescence emission due to the increase of point defects in glass.
%K terbium ions
%K gadolinium ions
%K scintillating glasses
%K energy transfer
%U http://www.jim.org.cn/fileup/PDF/20090426.pdf