Notes on the order-of-reflection dependence of microstrain broadening

The reflection-order-dependent increase of the integral breadth of microstrain broadening on the d* scale is investigated. Whereas for negligible local strain gradients `usual', linear increase of the integral breadth occurs, strain gradients can lead to a nonlinear and, for the special case of uncorrelated strains, to a parabolic increase of the integral breadth in association with Lorentzian line shapes.