Figure 3
Darwin curves of the 008 back-reflection with φ = 2°. Each curve was calculated under a constant incident plane wave [with photon energy EB + ΔE, the values of ΔE indicated in (a)–(d)] but with the crystal rotated. The rocking angle Δθ is relative to θ0 = φ = 2°. (a′)–(d′) are magnified views showing the four-beam diffraction intensity dips in (a)–(d), respectively. |