Figure 2
(a) Rocking curves in (left) the incident condition and (right) the exit condition for the first crystal at 12.4 keV with absorption. α = 6° and b = 0.21 in equation (3), where ωs, ωo and ωg represent the intrinsic Darwin width in the symmetric case (α = 0°), the incident acceptance and the exit reflectance, respectively. (b) DuMond diagrams in both symmetric and asymmetric geometries, where and represent the incident and exit angles on the first crystal, respectively. The same applies to and on the second crystal. |