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中文摘要：
采用提拉法生长了尺寸为30 mm×50 mm的（Yb3＋,La3＋）∶Gd2SiO5单晶和尺寸为24 mm×57 mm的（Yb3＋,Tb3＋）∶GdTaO4单晶,用X射线荧光法测量了掺杂样品的组分浓度在晶体中的分布,拟合了掺杂离子的有效分凝系数,结果表明：Yb3＋在Gd2SiO5晶体中的分凝系数为1.185（15）,接近单位1,而La3＋则为0.68（10）,偏离单位1较多,对晶体的光学均匀性会有较大的影响;Yb3＋和Tb3＋在GdTaO4中的分凝系数为0.84（14）和0.84（5）,接近单位1,对晶体的光学均匀性影响较小。
英文摘要：
The crystal（Yb3＋,La3＋）∶Gd2SiO5 with its size 30 mm×50 mm and crystal（Yb3＋,Tb3＋）∶GdTaO4 with its size 24 mm×57 mm were successfully grown by Czochralski method.The concentration distribution of doped ions in the crystals was detected by the X-ray fluorescence（XRF） spectroscopy and the effective segregation coefficients of doped ions were obtained by fitting calculation.The coefficient of Yb3＋ whose value is close unity in Gd2SiO5 crystal is 1.185（15）,and that of La3＋ whose value have a relatively larger deviation from unity is 0.68（10） will cause a greater influence on the optical homogeneity of the crystal.The coefficients of Yb3＋ and Tb3＋ in GdTaO4 crystal are 0.84（14） and 0.84（5） correspondingly,both of them a value close unit 1,which will affect optical homogeneity of the crystals.
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