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Figure 4
Power spectral density of the smooth sample. The data points were obtained from optical interferometry and from atomic force microscopy. The solid black curve is a polynomial fit to the concatenated data set. The solid green curve results from equation (8)[link] applied to the correlation function shown in Fig. 6[link].

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 29| Part 2| March 2022| Pages 447-455
https://doi.org/10.1107/S1600577522000534
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