Figure 1
First-order peak reflectivities of Pt/C multilayers versus number of layer pairs calculated for four different periodic lengths (d) with σ = 0 and 3 Å at an incidence angle of 0.3°. d values of 30, 35, 41 and 50 Å correspond to X-ray energies of 40, 35, 30 and 25 keV, respectively. σ values are marked on each curve. |