0105591 - UJF-V 20043140 RIV US eng J - Journal Article
Šaroun, Jan
Random-walk algorithm for the simulation of neutron diffraction in deformed mosaic crystals.
[Random-walk" algoritmus pro simulaci difrakce neutronů v deformovaných mosaikových krystalech.]
Nuclear Instruments & Methods in Physics Research Section A. Roč. 529, č. 1 (2004), s. 162-165. ISSN 0168-9002. E-ISSN 1872-9576
R&D Projects: GA ČR GA202/03/0891; GA AV ČR IAA1048003
Institutional research plan: CEZ:AV0Z1048901
Keywords : Monte Carlo simulations * neutron diffraction * neutron monochromators
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 1.349, year: 2004

A sampling formula is derived for random-walk steps, which simulate neutron transport through mosaic crystals with deformation gradient. The formula describes both purely gradient (elastically deformed) and undeformed mosaic crystals as limit cases. Simulations of reflection in a mosaic Ge crystal at asymmetric (Fankuchen defocusing) reflection geometry are shown as an example. The results demonstrate the effects of crystal deformation on reflectivity, neutron propagation inside the crystal and spatial profile of the diffracted beam.

Je prezentován "random-walk" algoritmus pro simulaci difrakce neutronů v deformovaných mosaikových krystalech.
Permanent Link: http://hdl.handle.net/11104/0012827