Figure 4
(a) SEM image of the region of interest. The sample is 150 µm thick. (b) Map of the X-ray response observed in the region displayed in (a) using a micrometer-size focused X-ray beam at 6 keV. The sensitivity of the detector appears to be closely dependent on the material as the grain structure can be clearly recognized. (c) Same map but measured at 3 keV (see text). |