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Figure 4
Evolution of the errors of the extracted parameters with measurement time for (a)–(c) the h-PS/bis-PCBM and (d)–(f) the d-PS/FBR samples. (a) and (d) NR curves measured with different counting times at the first incidence angle (0.8°). (b) and (e) NR curves measured at the second angle (3.0°) with different counting times, concatenated with the first section of the curve measured at the first angle. The reflectivity curves measured at a higher counting time are shifted for visibility. (c) and (f) The relative error of the parameters obtained by fitting the curves in panels (a), (b), (d) and (e) as a function of measurement time. The vertical black lines indicate the point at which the incidence angle was changed.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 59| Part 3| June 2026| Pages 765-773
https://doi.org/10.1107/S1600576726002657
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