五、参考文献 (1)F.W,Lytle,D.E.Sayers,E.A.Steen Phys.Rev.B1l.4825(1975). (2)刘建民、赵伯麟、陈训平，聚焦分光条件下EXAFS分辨率和信噪比与实验诸参数 的关系（待发表）。 A Study of the Relationship Between the Resolution Signal to Noise Ratio and the Experimental Data of EXAFS Liu Jianmin,Znao Bailin,Chen Xunping,Wu Ping abstract This paper describes in detail the relationship bet ween the resolut tion,signal to noise ratio and the experimental data from EXAFS mea sure ment.It has been presented the opinion of critical condition for experimental data and the method of a precise measurement.The rela- tionship between resolution,singnal to noise ratio and the critical ex- perimental data have been discussed and the follo wing conclutions ha ve been introduced at the critial condition: 1.The resolution is independent on the rocking curve width of the monochromator crystal when the width of entrance slit and exit slit both equal to the critial data but the signal to noise ratio depends on which is more important to the mosaic structure size that is charac te- rized by the rocking curve wicth of the mono-chromactor crystal:the intensity distribution or the extinction effect. 2.The entrance slit width increases to the optimum that the resolu- tion keepsa constant and the signal to noise ratio increase obviously wh the width of exit slit and the rocking curve of monochromator crys tal equal to the critical data.But the signal to noise ratio does not in crease with the entrance slit width if the width is largerth an the op timum. It has been shown in the paper that the conclution l is more suit- able to that where the perfection of the monochromator crystal is not good enough;and the conclution 2 is fit to perfect crystal. 112〕 ， 〕 刘建 民 、 赵伯 麟 、 的关系 待发表 五 、 参考文嗽 ， 陈训 平 ， 聚 焦分光 条件下 分辨率和信噪 比与实验 诸参数 ， ， ， ， ， 一 一 ， 一 一