Abstract
This work demonstrates that the threshold energy E0 can be obtained from a simple tentative rule and the bond length R can be obtained correctly by running the FIT program while fixing E0. The extended X-ray absorption fine structure (EXAFS) spectra for Cu, W, and Au metal foils are tested and for the anharmonic system, the experimental Cu spectra measured at temperatures of 50, 150, 295, 400, 500, 600 and 700K. From the tests, it is confirmed that a more precise bond length R comparable to the crystallographic data can be obtained for both cases. Moreover, it is deduced that the new running mode of the conventional EXAFS FIT program yields satisfactory results for the anharmonic system.
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