用RU-1000转靶X射线源及其测角仪系统,采集了金属玻璃Cu_(70)Ti_(30)室温(T=300K)和低温(T=80K)Cu的K吸收EXAFS谱。用本实验室编的“EXAFS数据处理程序库”对数据进行处理,以理论计算背散射振幅及相移值作数据拟合的方法,得到Cu原子与近邻原子的间距、配位数及Debye-waller因子等。讨论了Cu_(70)Ti_(30)金属玻璃中化学短程有序及Cu原子近邻结构的特征。
Copper K edge EXAFS spectrum of the metallic glass Cu_(70)Ti_(30) has been measured using RU-1000 rotating anode X-ray system with goniometer. Data analysis has processed based on the EXAFS analysis program package written in the authors' laboratory. The distances, coordination numbers and Debye-Waller factors between Cu atoms and neighbouring atoms are determined by fitting the experimental data with theoretical phase and backscattering amplitude. The chemical short range order and the atomic neighbouring structure feature of metallic glass Cu_(70)Ti_(30) have been discussed.
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