Comment on 'X-ray scattering from a randomly rough surface' - Reply

In a recent paper in this journal, the authors have presented a small-contr ast perturbation theory of the coherent and incoherent scattering of x-rays from a randomly rough surface. In a Comment on our work, de Beer compares its predictions with those of earlier theories of such scattering. In this reply we argue that several of his comments and conclusions are incorrect o wing to an insufficiently careful estimation of certain integrals that occu r in our theory.