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Figure 6
(a) Raman spectra (R-1 to R-12) from the contaminated mirror surface in intervals of 25 mm along the long dimension of the mirror (see Fig. 3[link]). Spectrum R-1 is from one edge of the mirror, spectrum R-7 from the centre (dense contaminated region) and R-12 from the other end of the mirror. (b) The corresponding cluster size (nm), I(D)/I(G) ratios, D- and G-peak width and D- and G-peak positions calculated from Lorentzian fittings in the 900–2000 cm−1 frequency range.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 24| Part 4| July 2017| Pages 757-764
https://doi.org/10.1107/S1600577517007123
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