Quantitative assessment of x-ray fluorescence holography for bcc Fe as a test case

Abstract

We report a pure direct x-ray-fluorescence holography measurement. It allows a straightforward data evaluation and a quantitative analysis of the reconstructed atomic images. The experimental hologram of a bcc Fe single crystal recorded with the Fe $K\ensuremath{\alpha},\ensuremath{\beta}$ lines is presented together with its three-dimensional reconstruction. An isotropic spatial resolution is obtained by using the symmetry information from the measured Kossel lines. The fluorescence emitter atom images its neighbors in a volume of $(7\AA{}{)}^{3}.$ The measured distances to the neighbors and the spatial resolution agree with the values obtained from calculated holograms within the errors of $\ifmmode\pm\else\textpm\fi{}0.2\AA{}.$