X-ray fluorescence holography: A different approach to data collection

The images of nearest neighbors of gallium atoms in a GaAs crystal were obt ained by the x-ray fluorescence holography technique. The fluorescence from gallium atoms was selected by means of a thin zinc foil filter that made p ossible the use of an x-ray silicon photodiode detector without energy reso lution. This method makes possible the detection of a much higher signal wi th respect to all previous experiments, thus reducing drastically measuring times, that is a basic and essential step from contemporary demonstration experiments to possible practical applications of x-ray holography in struc ture analysis.