Diamond monochromator-splitter with enhanced reflectivity for synchrotron radiation

It has been shown that a damaged surface layer can enhance the reflectivity of a diamond monochromator-splitter for synchrotron radiation. The X-ray d iffraction analysis with the use of asymmetric Bragg reflections allowed th e determination of the layer thickness and its mosaicity dispersion equal t o 3 mum and 19 ", respectively. In this case, the observed integrated inten sity of a quasisymmetric 422 Laue reflection (Mo-K alpha radiation) exceeds its calculated value by a factor of 2.5 at a sufficiently high energy reso lution (deltaE/E = 1.1 x 10(-5)) The perspectives of the practical use of a diamond monochromator-splitter with enhanced reflectivity are also discuss ed. (C) 2001 MAIK "Nauka/Interperiodica".