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Figure 5
As fluorescence signals (closed circles), specular fluxes (open circles) and diffracted fluxes (crosses) observed from an As/Si(001) sample in grazing-angle diffraction for (a) 220, (b[2\overline{2}0] and (c) 040 reflections in ultrahigh vacuum. Average As emission counts in 500 s are 650 in (a), 500 in (b) and 1400 in (c). The glancing-incidence angles used are indicated (φ0). Lines show least-squares fits.

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SYNCHROTRON
RADIATION
ISSN: 1600-5775
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