早在本世纪30年代,人们在研究各种物质对 X 射线的吸附时就发现,在各种元素的 X 射线吸收光谱中,在吸收限高能一侧30～1000eV范围内,吸收曲线出现波动状态精细结构。这种精细光谱结构称为“扩展 X 射线吸收精细结构”(Extended X-Ray Absorption FineStructure,EXAFS)。50～60年代的研究工作已经证明,EXAFS的形状与吸光原子的化学环境有关。70年代初,Sayers 等将 Ge 的 EXAFS 数据经付里 As early as the 1930s, when people studied the X-ray absorption of various substances, people found that the absorption curve fluctuated in the range of 30-1000eV on the X-ray absorption spectrum of various elements Fine structure. This fine spectral structure is called “Extended X-Ray Absorption Fine Structure” (EXAFS). Studies from the 1950s to the 1960s have shown that the shape of EXAFS is related to the chemical environment of the light-absorbing atoms. In the early 1970s, Sayers et al. Paid Ge’s EXAFS data