Figure 1
Formation of Kossel lines. Fluorescent radiation emitted by the atoms (A0) in the sample interferes with its Bragg reflection (AB) resulting in strong intensity modulations (A = A0 + AB) in the vicinity of cones defined by the normal of the diffracting plane (hkl) and the Bragg angle (ΘBragg). The viewing direction is in the diffracting planes (grey lines) but the cone is illustrated with an ellipse. Arrows indicate relevant direct (thick arrows) and reflected (thin arrows) plane-wave components of the spherical-wave fluorescent radiation. |