Calculation of the X-ray reflectivity of b-class mosaic crystals via the monte carlo method

Abstract

b-class mosaic crystals, including pyrolytic graphite, are widely used as neutron and X-ray mono-chromators in experimental physics and ensure a more intense yield of monochromatic radiation than do perfect crystals. A new technique that has been proposed for calculating the X-ray reflectivity of these crystals via the Monte Carlo method is implemented. According to this technique, repeated reflections of photons inside crystals and the experiment geometry can be correctly estimated for an arbitrary mosaicity distribution.