Accurate Bond Length Determination by EXAFS Method

Abstract

The Extended X-ray Absorption Fine Structure (EXAFS) spectra of pure iron, pure platinum and intermetallic compound Fe 2 Zr, whose strtuctures were well krown, have been measured at lower temperatures (20 K–300 K), and the accuracy of the interatomic-distance determination has been estimated. In order to increase the accuracy in determining the values of the structural parameters, the FABM technique proposed by Teo et al. has been applied. In our results, however the accuracy of the interatomic distance under various temperature could be improved almost an order of magnitude by assuming that the inflection point on the absorption edge represents the edge position.