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Figure 2
Definition of spectral purity for the classification of images using two steps. In step 1, the lowest value present in the entire, raw spectrum (top) was subtracted to reduce the background. In step 2, the area under the curve inside an 18 eV-wide window (red area) is divided by the area under the entire spectrum (red and grey areas). The resulting ratio was used to classify according to spectral purity using the definitions described in the main text.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 22| Part 3| May 2015| Pages 644-652
https://doi.org/10.1107/S1600577515005184
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